CN104663183A - Culture method of super purple sweet potato - Google Patents
Culture method of super purple sweet potato Download PDFInfo
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- CN104663183A CN104663183A CN201310634217.3A CN201310634217A CN104663183A CN 104663183 A CN104663183 A CN 104663183A CN 201310634217 A CN201310634217 A CN 201310634217A CN 104663183 A CN104663183 A CN 104663183A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
Abstract
The invention discloses the culture technology of crops, and specifically relates to a culture method of super purple sweet potato. The culture method achieves the productivity of 10000g of purple sweet potatoes per mu. According to the method, the super purple sweet potato has the characteristics of being strong to grow, resistant to barren, early to sprout, purple green in color of tender stalk, strong in vines, less in diseases and insect pests, high in resistance to typhoon and rainstorm, slightly influenced by natural hazard, an wide in applicability; a culture field for the super purple sweet potato is selected and constructed; the sprouting and forced sprouting conditions and method of the super purple sweet potato are utilized; the super purple sweet potato parent is used for culturing the strong super purple sweet potato seedlings; the high-output culture technology and method of the super purple sweet potato are utilized to perform culture management for the super purple sweet potato; the diseases and insect pests are prevented and controlled for the super purple sweet potato; the super purple sweet potato is harvested at proper time; the super purple sweet potato produced exceeding 10000g per mu sets a new international and national records; the cultured super purple sweet potato is large, high in quality and high in output; the modern agricultural planting is met; the super purple sweet potato is applied to the international and national markets; the economic benefits of agricultural production and planting is increased.
Description
Technical field
The invention belongs to proportion of crop planting technical field, be specifically related to the cultivation method of a kind of super purple sweet potato, the good harvest of, high-quality large with the shape realizing super purple sweet potato, per mu yield 10000 jin.
Background technology
The invention belongs to the innovation and creation of agricultural production practice, be devoted to the method and practice of the cultivation of super purple sweet potato, the present invention is in the autumn and winter of 2012 and 2013, and the per mu yield successfully realizing super purple sweet potato for continuous 2 years surpasses the domestic and international new record of ten thousand jin.The cultivation method of the super purple sweet potato of the present invention, explore the cultivation practices experience in existing more than ten years, non-avaible of the present invention can be sought, and cannot quote as proof.
Purple sweet potato cries again sweet potato, sweet potato, pachyrhizus, and originate in Central America, Yin Qipi, meat color are purple, so cry purple sweet potato.
Purple sweet potato moisture foot, content of starch 18%-20%, every 100 grams of edible part heat content 3.5 kilocalories, 3.15 grams, protein, 0.81 gram, fat, 4.2 grams, carbohydrate, raw fiber 1.1 grams, ash content 1.2 grams, calcium 16 milligrams, 34 milligrams, phosphorus, iron 2.32 milligrams, carotin 6.43 milligrams, thiamine 0.07 milligram, vitamin B2 0.25 milligram, vitamin C 32 milligrams, niacin 0.71 milligram.Especially the content of selenium is higher; the light violet sweet potato of organic selenium content every kilogram reaches more than 0.01 milligram; the light violet sweet potato of anthocyanidin content every kilogram reaches 200 milligrams, often ediblely can play ease constipation, defaecation, improves immunocompetence, reduces blood pressure, protects the health-care effect of liver, anticancer, anti-cancer.
Purple sweet potato because of its Se content high, be 20 times of general potato class, be also referred to as selenium-rich purple sweet potato.The purple sweet potato of opinion quality every strain knot potato number is on the high side, and 6-8 at least, 20-30 at most, potato block is less than normal, and mostly like egg or goose egg size, in long spindle-type, yampi block ratio is few.Its per mu yield is generally at 500 kilograms-1000 kilograms at present.
It is strong, resistance to lean that purple sweet potato has growing way, and germinating morning, tender stem look purple is green, tendril is sturdy, and damage by disease and insect is few, and to typhoon and heavy rain resistance, also comparatively slight by natural calamity, the features such as wide adaptability;
Take a broad view of the production of domestic and international purple sweet potato, its present situation is that purple sweet potato nutrient content is high, individual little, yield poorly.The research topic of pendulum in face of people is the body how increasing purple sweet potato, improves the output of purple sweet potato, create, cultivates the cultivation method of the super purple sweet potato of per mu yield ten thousand jin, to improve the economic benefit of planting purple sweet potato.
Summary of the invention
Technical problem to be solved by this invention is, selects, creates super purple sweet potato milpa; Super purple sweet potato cultivating seeds is adopted to go out super purple sweet potato strong sprout, use culture technique, the method for super purple sweet potato, carry out the cultivation to super purple sweet potato and management, carry out the extermination of disease and insect pest of super purple sweet potato, the super purple sweet potato of timely collecting, by cultivating the practice of super purple sweet potato, summing up experience, put forward the methods, change the situation that current purple sweet potato is little, yield poorly, the cultivation method of a kind of super purple sweet potato is provided, makes that the super purple sweet potato body of production is large, high-quality, output are high, per mu yield reaches new cultivation technology, the new method of ten thousand jin.
The object of this invention is to provide the cultivation method of a kind of super purple sweet potato, realize that purple sweet potato body is large, quality good, output is high, to reach the super purple sweet potato of per mu yield ten thousand jin.
Technical characteristics of the present invention is: select, create super purple sweet potato milpa; Adopt super purple sweet potato cultivating seeds super purple sweet potato strong sprout, use culture technique, the method for super purple sweet potato, carry out the cultivation to super purple sweet potato and management, carry out the extermination of disease and insect pest of super purple sweet potato, the super purple sweet potato of timely collecting, obtains the super purple sweet potato that body is large, quality good, output is high in enormous quantities through cultivating, and leads modern agriculture to plant super purple sweet potato, be supplied to domestic and international market, meet the consumption demand of people.
The concrete technology of invention is:
1, the selection of super purple sweet potato milpa and establishment:
(1) according to being applicable to super purple sweet potato habit and production factors, selecting and creating milpa.Different soil is selected to have different impacts to super purple sweet potato body, quality, output; Should according to applicable super purple sweet potato habit and production factors, select soil: select the sand soil being rich in organic black, purple, yellow mud chiltern ground; Require that physical features is slightly high, sunny, the soil is porous, and soil is rich in organic matter, selenium content is high, and soil layer is deep, and preserve moisture and fertility, granular structure are good, good permeability, row, Rang soil easily, soil pH 4.8-7.6; Selection is made a clear distinction between the four seasons, the temperate zone milpa of pleasant Climate creates super purple sweet potato milpa;
(2) super purple Ipomoea short day crop, it needs sufficient sunlight, and select to make a clear distinction between the four seasons, sunshine is sufficient, the temperate zone milpa of pleasant Climate creates selenium-rich purple sweet potato ground.Adapt to most selection and the establishment of super purple sweet potato milpa, rich selenium hillside fields on the sunny side or the super purple sweet potato of rich selenium field plantation be selected, make that the super purple sweet potato body of production is large, selenium content is high, and quality is good.
(3) selection of super purple sweet potato milpa will adapt with the environmental weather conditions of locality with establishment.Super purple sweet potato cauline leaf growth thermophilic 18 DEG C-30 DEG C, temperature stops growing lower than 15 DEG C, and temperature just can normal growth at 18 DEG C; It is 21 DEG C-25 DEG C that potato block expands the suitableeest temperature, and ground temperature expands lower than 20 DEG C of stoppings, more than 35 DEG C of growth retardations.The environmental requirement that selection and the establishment of super purple sweet potato milpa will grow with above-mentioned purple sweet potato adapts.
(4) super purple sweet potato blade moisture transpiration amount is large, demand large, in cauline leaf peak of growing season, and the key element that soil moisture content is advisable with 55%-80%; Super purple sweet potato ground will be created in that the rainfall is plentiful, there is the climate characteristic that between Clear and Bright, autumnal equinoctial period, rain is numerous and confused, extremely adapt to the growth of super purple sweet potato, selection and the establishment of super purple sweet potato milpa require pleasant Climate, arrange, pour water easily area field or plot.
(5) super purple sweet potato has fearness stain, is afraid of the feature of flood.The selection of super purple sweet potato milpa requires with creating: best without typhoon, without flood, without the field of drought or plot.
(6) be applicable to super purple sweet potato cauline leaf growth thermophilic at 15 DEG C-35 DEG C, temperature stops growing lower than 15 DEG C, more than 35 DEG C of growth retardations.The weather of the super purple sweet potato growth of long-term adaptation will have about 230 days, increases effective vegetative period of super purple sweet potato, can make that the type body of super purple sweet potato is large, quality good, output is high, the harvest that land utilization rate is high, good in economic efficiency.
2, the condition of super purple sweet potato nurturing staff and method
(1), the condition of super purple sweet potato seed sprouting vernalization.
The optimal temperature conditions of super purple sweet potato seed sprouting vernalization is between 15 DEG C-25 DEG C, hinders seed sprouting and young Stem nematode, should not sow more than 30 DEG C.According to the temperature condition needed for the vernalization of super purple sweet potato seed sprouting, we are in order to improve the output of super purple sweet potato, increase effective vegetative period of super purple sweet potato, accomplish nurturing staff ahead of time, reach the object of early planting good harvest, manually to find or to create the condition of a kind of super purple sweet potato seed sprouting vernalization, to adapt to its germination vernalization, strong sprout must be cultivated early.
Germination vernalization and the sowing of the super purple sweet potato seed in south of China can be selected at spring, Xia Liangji, and the germination vernalization sowing of season late spring one can be selected in the north.
(2), the method for super purple sweet potato seed sprouting vernalization:
1., the method for artificial thermophilic germination vernalization:
Spring, south China round the clock temperature more than 15 DEG C, less than 22 DEG C, suitable super purple sweet potato seed sprouting vernalization and sowing.Because super purple sweet potato seed head is not of uniform size, seed winter dormancy deep mixed, germinate below 15 DEG C slow, the seeding stage is long, for accelerating its germination, emerging and can adopt following methods:
A, to bask seeds: the super purple sweet potato seed selecting the high-quality of a year, before germination vernalization, select fine day to bask seeds 2-3 days, guarantee that Seed imbibes is consistent, germinate neat.And the disinfection carried out super purple sweet potato seed.
B, seed soaking: soak seed super purple sweet potato seed in the warm water of 25 DEG C-30 DEG C before sowing 2-3 hour, to improve the temperature of seed, activates the growth activity of seed cell, is conducive to seed sprouting growth.
The method of C, germination vernalization:
After first super purple sweet potato seed being soaked seed 2-3 hour in the warm water of 25 DEG C-30 DEG C, pull out, spread out and dry 10-15 minute, the super purple sweet potato seed suctioning moisture is placed in the gunnysack or straw bag bag soaked with 30 DEG C of warm water, lie in environmental temperature at 20 DEG C 25 DEG C, can artificially create applicable temperature, relative moisture is under the condition of 65%80%, or is 20 DEG C-30 DEG C in moisture meter humidity and carries out germination vernalization.Every day, check 2-4 time, find scene temperature or humidity on the low side, can suitably temperature adjustment or appropriate spraying warm water be humidified.General after 8-10 days, namely can sprout successively; When bud grows to 1-2 centimetre, super purple sweet potato seed just can at seeding in nursery bed.
2., insulating box (room) germination germination accelerating method:
In the factory in super purple sweet potato cultivating seeds with good conditionsi strong sprout, the middle control temperature of insulating box (room) can be used at 20 DEG C-25 DEG C, relative moisture is under the condition of 65%-80%, or is 20 DEG C-30 DEG C germination vernalization carrying out super purple sweet potato seed in moisture meter humidity.
First super purple sweet potato seed is selected, disinfected, with 30 DEG C of thermostatted water seed soaking after 1-2 hour, seed through seed soaking is pulled out, spread out and dry 10-15 minute, the super purple sweet potato seed suctioning moisture is placed in the gunnysack or straw bag bag soaked with 30 DEG C of warm water, in the insulating boxs of 20 DEG C-25 DEG C (room), relative moisture is under the condition of 65%-80%, carry out the germination vernalization to super purple sweet potato seed, through 8-10 days, namely can sprout successively, when bud grows to 1-2 centimetre, super purple sweet potato seed just can at seeding in nursery bed.
(3), seeding in nursery bed cultivates the method in super purple sweet potato strong sprout:
Select the leeward ground, seedbed being rich in organic matter faced south, first execute and make decomposed manure by oneself, carry out seedbed; By super purple sweet potato seed head-up, tail down, is tiltedly planted on seedbed, is accomplished that head is concordant, spacing 2-3 centimetre; Get sprayer 25 DEG C of-30 DEG C of warm water seed is squirted, cover fine earth, execute the people's muck that becomes thoroughly decomposed, after covering the straw of 1-2 cm thick, straw is allowed to absorb sunlight temperature, improve ground temperature, then cover mulch film, then cover sky film, heat and moisture preserving, during nurturing staff, focus on accepting sunlight and ventilating in time, water, seedling bed temperature is controlled at 20 DEG C-25 DEG C.When growing to more than 20 centimetres to potato seedling, just can cut seedling, get seedling, seedling is inserted into large field and go.
3, soil is selected.
Different soil is selected to have different impacts to the body of super purple sweet potato, quality, output; According to applicable super purple sweet potato habit and production factors, soil should be selected: require to select to be rich in organic black, purple, sand soil; Or be rich in the soil of organic yellow soil quality; The soil is porous in selection, and physical features is slightly high, sunny, and soil is rich in organic matter, selenium content is high, and soil layer is deep, and preserve moisture and fertility, granular structure are good, good permeability, row, Rang soil easily, soil pH 4.8-7.6; The temperate zone milpa made a clear distinction between the four seasons, weather is got married is selected to create super purple sweet potato milpa.
4, wholely ridge and soil melioration, is done.
1), the body of super purple sweet potato is large, quality good, output is high, good harvest needs dark, loose, alive, moist, fertile good soil environment; Super purple sweet potato requires to deep plough in 1 week-2 week in advance wholely; General nonirrigated farmland to deep plough 40 centimetres, paddy field need deep plough 50 centimetres, tillage pan be broken, be beneficial to rainwater diafiltration, avoid field ponding.
2), combine deep ploughing, every mu adopts homemade decomposed manure 4500 kilograms-5000 kilograms, improvement soil.
3) decomposed manure is made by oneself: adopt with chicken manure, duck excrement, pig manure, horse, ox, sheep barnyard manure, night soil, corn, sorghum straw, green manure, straw, sugarcane skin, rice chaff, organic waste etc. are raw material, carry out Harmless process the first half: at summer or high temperature season in fertilising, straw, green manure, sugarcane skin etc. are cut off and mixes with other raw material, add 2% ~ 3% lime, water-sprinkling mix wet, pile up, plastic covering film, make its abundant fermentation maturity.Yeast phase heap in temperatures as high 60 DEG C ~ 70 DEG C, can effectively kill in farm organic fertilizer with sick worm and crop smothering, and process after organic manure easily absorbed by super purple sweet potato.
4), do ridge to require: row spacing 75 centimetres, ridge sound stage width 55 centimetres, ridge is high 25 centimetres, ridge face width 35 centimetres, and furrow is wide 20 centimetres.Adopt zanjon, micro-ridge, single file planting patterns.Before doing ridge, Xian Walong center cunette, imbed the green manure cutting into 2-3 cun long in cunette portion, center, ridge: clover, safflower grass seed or blue or green broad bean straw and so on, the green manure thickness imbedded is 5-8 centimetre; The green manure imbedded bottom the ditch of center, ridge, top evenly applies self-control decomposed manure; Above the self-control decomposed manure applied, every mu of sealing fertilizer 50 kilograms-80 kilograms, superphosphate 10 kilograms-20 kilograms, ash 5-10 makes ridge after carrying on a shoulder pole; After doing ridge, take advantage of soil moistening, a weed killer herbicide be played and prevent weed growth.
5), plant super purple sweet potato before, be control of grubs harm, adopt chemicals treatment soil; Use 50% phoxim emulsifiable concentrate, every mu of consumption 200 ~ 250 grams, adds water 10 times, is sprayed on 20 ~ 35 kilograms of fine earths mix thoroughly to make pesticide-clay mixture, along ridge row replacement; Maybe this pesticide-clay mixture is spread on kind of ditch or ground, or be mixed into self-control decomposed manure in use; Or with 2% Isofenphos methyl powder, every mu of consumption 2 ~ 3 kilograms, mixes fine earth 20 ~ 35 kilograms and makes pesticide-clay mixture, row replacement; Or with 3% Isofenphos methyl granule or 5% phoxim granule, or 5% diazinon granule, 2.2 ~ 3.2 kilograms every mu process soil.
5, early plant in good time:
The plantation of super purple sweet potato, when spring, temperature was at 15 DEG C, just can cuttage, cutting time is more early better, to increase effective vegetative period of super purple sweet potato, improves the output of super purple sweet potato; Spring plants super purple sweet potato in late April to mid-May, with cuttage as well.
6, super purple sweet potato cottage method:
The quality of super purple sweet potato cottage method, physical size, quality good or not, the output height of the directly super purple sweet potato growth of impact; Super purple sweet potato cottage method:
(1), oblique cutting method: the super purple sweet potato long 18-22 centimetre in strong sprout of clip, has 4-5 joint; Seedling bar becomes miter angle with face, ridge, uses scuppit borehole, is inserted by seedling bar in the soil of ridge, with the real earth of ten finger pressures, allows seedling bar plant into ridge soil 2 joint, exposes 2-3 joint.This kind of method cuttage, between offspring knot, it is more to tie purple sweet potato, generally can tie 5-8 super purple sweet potato, most multipotency ties more than 10, tie the shape of super purple sweet potato as Geese egg size, individual weight 80 grams-150 grams, the shape of larger super purple sweet potato is as fist size, individual heavy 150 grams-250 grams, and maximum focuses on 1200 grams-1500 grams, the heavy output of the average strain of super purple sweet potato is at 400 grams-850 grams, per mu yield is generally at 1900 kilograms-2400 kilograms, and its output is higher, and potato shape is larger.
(2), Using Horizontal Bridgman Method: the super purple sweet potato long 20-24 centimetre in strong sprout of clip, has 5 joints; Seedling bar becomes contour cultivation with face, ridge, with scuppit in the ditching of face, ridge, by the soil of seedling bar contour cultivation ridge, refers to ridging compacting earth, plant into 3 joints, expose 2 joints with ten.The super purple sweet potato of Using Horizontal Bridgman Method plantation, between offspring knot, tie super purple sweet potato a lot, generally can tie 6-15 super purple sweet potato, tie the less Xing of super purple sweet potato body as Ji egg size, individual heavy 50 grams-80 grams, maximum super purple sweet potato is as Geese egg size, individual heavy 80 grams-150 grams, the average strain of super purple sweet potato focuses on 450 grams-950 grams, and per mu yield is generally at 1800 kilograms-2100 kilograms.Its output is lower, and potato shape is less.
(3), more piece Using Horizontal Bridgman Method: the super purple sweet potato long 50-80 centimetre in strong sprout of clip, has 10-15 joint; Seedling becomes contour cultivation with face, ridge, with scuppit in the ditching of face, ridge, by the soil of seedling contour cultivation ridge, refers to ridging compacting earth with ten; Plant into 7-11 joint, expose 3-4 joint.The super purple sweet potato of more piece Using Horizontal Bridgman Method plantation, between each root knot, ties purple potato several, general energy knot purple potato 25-45 super purple sweet potato, to tie super purple sweet potato body very little, the average strain of super purple sweet potato focuses on 1000 grams-1850 grams, and per mu yield is generally at 1900 kilograms-2300 kilograms.Its output is better, and potato shape is less.
(4), seminal propagation working system: every mu of super purple sweet potato field, first to scrape out in 665-667 " plantation fort ", " plantation fort " each diameter is 75 centimetres-80 centimetres, be the round pool of 45 centimetres-50 centimetres deeply, each " plantation fort " uses 50 kilograms, green manure, self-control decomposed manure 60 kilograms-70 kilograms, composite fertilizer 1 kilogram-1.2 kilograms, first bury under " plantation fort " and put green manure, self-control decomposed manure is applied again on green manure, above self-control decomposed manure, evenly apply composite fertilizer, above composite fertilizer, cover loosening the soil of 20 cm thicks; " plantation fort " is made between surrounding senior middle school low, is beneficial to keep " plantation fort " interior soil moisture, impels super purple sweet potato to grow fast, outside each " plantation fort ", be with drain ditch, and each drain ditch ditch ditch is connected, can arrange water and easily fill with; Utilize super purple sweet potato seed (or the seed after breeding super purple sweet potato seedling), super purple sweet potato seed is planted in " plantation fort " center, allow the potato rattan of super purple sweet potato seed growth, arbitrarily to all the winds extend, when the potato rattan of super purple sweet potato seed is stretched to 35-40 centimetre to surrounding, be in the circumference range of 20 centimetres by being the radius in the center of circle according to super purple sweet potato seed, cover with the earth of humidity, thickness of earth covering is at 20 centimetres-25 centimetres, earthing is executed the people's muck that becomes thoroughly decomposed, allows and to be taken root knot potato by the potato rattan internode that earth covers; When etc. super purple sweet potato stem and leaf, to be stretched to from super purple sweet potato seed be the 65-75 centimetre in the center of circle, again between the circumference range of radius 45-55 centimetre from super purple sweet potato seed being the center of circle, cover super purple sweet potato stem and leaf with the earth of humidity, thickness of earth covering is at 20 centimetres-25 centimetres; And become thoroughly decomposed people's muck with executing and combine the method for spraying fertilization of leaves, cultivate the super purple sweet potato being covered rattan joint by earth; With the super purple sweet potato that this kind of method is cultivated, when gathering in the crops, each heavy 250 grams-1500 grams super purple sweet potatoes of general energy results, maximum super purple sweet potato can be obtained and focus on 2 kilograms-4 kilograms, each " plantation fort " can gather in the crops the super purple sweet potato of 45 kilograms-65 kilograms, the highest per mu yield can reach 3200 kilograms-3800 kilograms, and with this kind, the super purple sweet potato shape of method plantation is large, output is high, quality good.
(5), vertically plant hydroponics: select anosis super purple sweet potato tendril head, the super purple sweet potato long 20-25 centimetre in strong sprout of clip, there is 5-6 joint; Remove by the sub-two panels of root lateral lobe, carry out vertically inserting strong sprout and plant: seedling bar and face, ridge degree in a vertical angle, use scuppit borehole, seedling bar is vertically inserted in the soil of ridge, refer to ridging compactings with ten; Plant into 2 joints, expose 3-4 joint.This kind of method cuttage, between offspring knot, tie super purple sweet potato less, generally can tie 3-5 super purple sweet potato, to tie super purple sweet potato body large, single super purple sweet potato focuses on 400 grams-750 grams, and maximum single super purple sweet potato can reach 2 kilograms-3 kilograms, individual plant average yield is at 1850 grams-2150 grams, and the highest single plant yield can reach more than 5 kilograms; What per mu yield was the highest reaches more than 5000 kilogram, i.e. per mu yield more than 10000 jin, with the super purple sweet potato body of this kind of method plantation is large, output is high, better quality.
7, rational close planting: according to soil property, fertility and rattan seedling characteristic, determine rational cutting density; Adopt ridge kind method, spacing in the rows 30-35 centimetre, line-spacing 68-72 centimetre, every mu of cuttage purple sweet potato seedling 3400-3700 strain.Adopt seminal propagation working system, every mu is " plantation fort " 665-667, plants super purple sweet potato seed 665-667.
8, field management:
(1), after super purple sweet potato seedling plants one week, seedling be looked into, fill the gaps with seedlings, guarantee full stand.
(2), after super purple sweet potato seedling plantation first quarter moon, when finding weed growth, carry out chemical weed control with the Acetochlor of 150 times every mu, consumption every mu 100 grams, sprayer adds water 4, sprays weeding; Or use artificial weeding.
(3), in whole super purple sweet potato to intertill 2-3 time vegetative period, in conjunction with intertill and clean tillage, loosen the soil, earth up, support ridger, fertilising.
(4), super purple sweet potato is afraid of stain, is afraid of flood, rainy season, timely draining.During arid, timely drought resisting to water, spraying fertilizer; Will pour water in field ditch in time when arid is serious, impose foliage fertilizer, occur 4-5 fine day general summer continuously, water once to super purple sweet potato, the super purple sweet potato of every strain about waters the water of 1 kilogram, or waters the fertile 600-800 gram of loose stool.
(5) tendril is carried.Carry tendril and can lift the super purple sweet potato tendril coring being tied in side, ridge or bottom of trench at different levels, be conducive to stopping between tendril, tie potato block, make concentrating and effective photosynthesis of nutrient, impel expanding of super purple potato stem tuber, generally can increase production 50%-80%.When carrying tendril, accomplish " four are not ": do not turn over rattan, do not trample cauline leaf, do not pull apart cauline leaf, do not hinder cauline leaf; As injured cauline leaf top slightly, can impel axillalry bud that new skill and leaflet occur, having reduced photosynthesis, causing the underproduction; Enter rainy season, super purple sweet potato tendril is raw adventive root easily, easily disperses nutrient, should mention super purple sweet potato tendril gently, after lifting adventive root, then replace, and to reach the growth suppressing tendril adventive root, makes nutrient concentrate on the object of potato block; After carrying tendril, tendril is put in original place, not upset tendril direction, be conducive to strengthening photosynthesis, improve super purple sweet potato output.
(6), 8, September, have diastrous weather and occur, there will be the spy such as typhoon or arid and send out weather, the combating typhoon of super purple sweet potato be carried out, prevent waterlogging and drought relief work.There is prolonged drought, weather short of rain, carry out and water, pour water, fertilising work.
(7), spraying fertilizer, 7, August divides, and spraying fertilizer, monthly spraying fertilizer 1-2 time, executes the human excrement 800 kilograms-1000 kilograms that becomes thoroughly decomposed for every mu, impel super purple sweet potato block to expand; To late September, temperature starts to decline, purple sweet potato Root Absorption ability, and now the potash fertilizer requirement of purple sweet potato increases, the major way mending potassium sprays foliage fertilizer, 400g/ mu. execute, 0.3% potassium dihydrogen phosphate aqueous solution 50 kilograms-60 kilograms, energy amount of increase in production is at 10%-20%; Or every mu sprays with ash leachate 150 kilograms-200 kilograms, the body of super purple sweet potato can be increased, improve the quality of super purple sweet potato, increase the output of super purple sweet potato.
9, prevention and elimination of disease and pests
To prevent eliminating aphis vegetative period in super purple sweet potato, purple potato tortrix moth, golden devil, the insects such as prodenia litura.Find aphid, use 10% Imidacloprid, every mu of medication 10 grams-15 grams, to 40 kilograms 450 kilograms, water, evenly sprays; When finding super purple sweet potato tortrix moth, golden devil, with 48% Le Siben EC, every mu of consumption 30ml, water distribution 1000-1500 times liquid, sprays; Find prodenia litura, every mu of use 1% missible oil 15 grams ~ 25 grams, to 50 kilograms ~ 60 kilograms, water, contain and send out a phase even spraying, or use Du Pont's safety hit in low instar larvae, every mu of 1 bag of filling with 5ml, water distribution 3000 times, sprays.
10, gather in time.
When the temperature of the growing environment of super purple sweet potato is lower than 15 DEG C, when entering autumn and winter season, after super purple sweet potato comes to the ripening period, should excavate in time and gather.
The super purple sweet potato preparing breeding in the coming year field, in support several days more, make super purple sweet potato potato block ripe, after having dug, under the sun, shine 2-3 days, make the drying of potato kind, and killing pathogenic bacteria.The purple sweet potato taken is not divided and to pull open, and bunchiness preserve, reduces potato block wound, use cellar or the warming technology of moisturizing, and guarantee potato kind is survived the winter quality.
By enforcement of the present invention and application, not only change the situation that purple sweet potato body is little, output is few, of poor quality, economic benefit is low of cultivating and growing in the past, and break the per mu yield that people in the past plant purple sweet potato and hover 1500 kilograms of-2000 kilograms of balky situations always, create and achieve the domestic and international new record that super purple sweet potato per mu yield reaches the high yield and bumper harvest of ten thousand jin.
Accompanying drawing explanation
Fig. 1 is the super purple sweet potato that the present invention cultivates.
Fig. 2 is one jiao, the scene that super purple sweet potato per mu yield that the present invention cultivates surpasses ten thousand jin.
Embodiment
Example 1: seminal propagation working system:
Every mu of super purple sweet potato ground, first to scrape out in 665-667 " plantation fort ", " plantation fort " each diameter is 75 centimetres-80 centimetres, be the round pool of 45 centimetres-50 centimetres deeply, each " plantation fort " uses 50 kilograms, green manure, self-control decomposed manure 60 kilograms-70 kilograms, composite fertilizer 1 kilogram-1.2 kilograms, first bury under " plantation fort " and put green manure, self-control decomposed manure is applied again on green manure, above self-control decomposed manure, evenly apply composite fertilizer, above composite fertilizer, cover loosening the soil of 20 cm thicks; " plantation fort " is made between surrounding senior middle school low, is beneficial to keep " plantation fort " interior soil moisture, outside each " plantation fort ", is with drain ditch, and each drain ditch ditch ditch is connected, can arrange water and easily fill with; Utilize super purple sweet potato seed (or the seed after super purple sweet potato breeding seedling), super purple sweet potato seed is planted in " plantation fort " center, allow the potato rattan of super purple sweet potato seed growth, arbitrarily to all the winds extend, when the potato rattan of super purple sweet potato seed is stretched to 35-40 centimetre to surrounding, be in the circumference range of 20 centimetres by being the radius in the center of circle according to super purple sweet potato seed, cover with the earth of humidity, thickness of earth covering is at 20 centimetres-25 centimetres, earthing is executed the people's muck that becomes thoroughly decomposed, allows and to be taken root knot potato by the potato rattan internode that earth covers; When etc. super purple sweet potato stem and leaf, to be stretched to from selenium-rich purple sweet potato seed be the 65-75 centimetre in the center of circle, again between the circumference range of radius 45-55 centimetre from super purple sweet potato seed being the center of circle, cover super purple sweet potato stem and leaf with the earth of humidity, thickness of earth covering is at 20 centimetres-25 centimetres; And become thoroughly decomposed people's muck with executing and combine the method for spraying fertilization of leaves, cultivate the super purple sweet potato being covered rattan joint by earth; With the super purple sweet potato that this kind of method is cultivated, when gathering in the crops, each heavy 250 grams-1500 grams super purple sweet potatoes of general energy results, maximum super purple sweet potato can be obtained and focus on 2 kilograms-4 kilograms, each " plantation fort " can gather in the crops the super purple sweet potato of 45 kilograms-65 kilograms, the highest per mu yield can reach 3200 kilograms-3800 kilograms, and with this kind, the super purple sweet potato shape of method plantation is large, output is high, quality good.
Example 2: do ridge and vertically plant hydroponics:
The body of super purple sweet potato is large, quality good, output is high, good harvest needs dark, loose, alive, moist, fertile good soil environment.Super purple sweet potato ridge requires to deep plough in 2 weeks-3 weeks in advance; General nonirrigated farmland to deep plough 40 centimetres, paddy field need deep plough 50 centimetres, tillage pan be broken, be beneficial to rainwater diafiltration, avoid field ponding.
In conjunction with deep ploughing, every mu adopts homemade decomposed manure 4500 kilograms-5000 kilograms, improvement soil.
Self-control decomposed manure, adopt with chicken manure, duck excrement, pig manure, horse, ox, sheep barnyard manure, night soil, corn, sorghum straw, green manure, straw, sugarcane skin, rice chaff, organic waste etc. are raw material, carry out Harmless process the first half in fertilising: at summer or high temperature season, straw, green manure, sugarcane skin etc. are cut off and mixes with other raw material, add 2% ~ 3% lime, water-sprinkling mix wet, pile up, plastic covering film, make its abundant fermentation maturity.Yeast phase heap in temperatures as high 60 DEG C ~ 70 DEG C, can effectively kill in farm organic fertilizer with sick worm and crop smothering, and process after organic manure easily absorbed by selenium-rich purple sweet potato.
Do ridge to require: row spacing 75 centimetres, 55 centimetres, ridge base, ridge is high 25 centimetres, 35 centimetres, face, ridge, 20 centimetres, furrow.Adopt zanjon, micro-ridge, single file planting patterns.
Before doing ridge, Xian Walong center cunette, imbeds the green manure cutting into 2-3 cun long: clover, safflower grass seed or blue or green broad bean straw and so on, the green manure thickness imbedded is 5-8 centimetre in cunette portion, center, ridge.
Self-control decomposed manure is evenly applied above the green manure imbedded bottom furrow.
Above the self-control decomposed manure applied, every mu sealing fertilizer 50-80 kilogram, superphosphate 10-20 kilogram, ash 5-10 load after, make ridge.
After doing ridge, take advantage of soil moistening, a weed killer herbicide be played and prevent weed growth.
Before planting super purple sweet potato, be control of grubs harm, adopt chemicals treatment soil.Use 50% phoxim emulsifiable concentrate, 200 ~ 250 grams every mu, add water 10 times, be sprayed on 20 ~ 35 kilograms of fine earths mix thoroughly and make pesticide-clay mixture, along ridge row replacement; Maybe this pesticide-clay mixture is spread on kind of ditch or ground, or be mixed into self-control decomposed manure in use; Or with 2% Isofenphos methyl powder, mix fine earth 20 ~ 35 kilograms for 2 ~ 3 kilograms every mu and make pesticide-clay mixture, row replacement; Or with 3% Isofenphos methyl granule, 2.2 ~ 3.2 kilograms every mu process soil.
Select anosis super purple sweet potato tendril head, the super purple sweet potato long 20-25 centimetre in strong sprout of clip, there is 5-6 joint; Remove by the sub-two panels of root lateral lobe, carry out inserting strong sprout and plant; Seedling bar and face, ridge degree in a vertical angle, uses scuppit borehole, is vertically inserted by seedling bar in the soil of ridge, refers to ridging compacting with ten; Plant into 2 joints, expose 3-4 joint.
Rational close planting: according to soil property, fertility and rattan seedling characteristic, determine rational cutting density; Adopt ridge kind method, spacing in the rows 30-35 centimetre, line-spacing 68-72 centimetre, every mu of vertical cuttage purple sweet potato seedling 3400-3700 strain.
The cultivating and managing of the super purple sweet potato of ridge kind is carried out in conjunction with field management, fertilising, the extermination of disease and insect pest.
Do ridge and vertically plant hydroponics, between offspring knot, tie super purple sweet potato less, generally can tie 3-5 super purple sweet potato, to tie super purple sweet potato individual large, single super purple sweet potato focuses on 400 grams-750 grams, and maximum single super purple sweet potato can reach 2 kilograms-3 kilograms, individual plant average yield is at 1850 grams-2150 grams, and the highest single plant yield can reach more than 5 kilograms; What per mu yield was the highest reaches more than 5000 kilogram, i.e. per mu yield more than 10000 jin, with the super purple sweet potato shape of this kind of method plantation is large, output is high, better quality.
Claims (1)
1. the cultivation method of super purple sweet potato, is characterized in that:
(1) selection of super purple sweet potato milpa and establishment: select the sand soil being rich in organic black, purple, yellow mud chiltern ground; Require that physical features is slightly high, sunny, the soil is porous, and soil is rich in organic matter, selenium content is high, and soil layer is deep, and preserve moisture and fertility, granular structure are good, good permeability, row, Rang soil easily, soil pH 4.8-7.6; Selection is made a clear distinction between the four seasons, the temperate zone milpa of pleasant Climate creates super purple sweet potato milpa;
(2), germination germination accelerating method:
1), the method for artificial thermophilic germination vernalization:
A, to bask seeds: the super purple sweet potato seed selecting the high-quality of a year, before germination vernalization, select fine day to bask seeds 2-3 days, guarantee that Seed imbibes is consistent, germinate neat; And the disinfection carried out super purple sweet potato seed;
B, seed soaking: soak seed super purple sweet potato seed in the warm water of 25 DEG C-30 DEG C before sowing 2-3 hour, to improve the temperature of seed, activates the growth activity of seed cell, is conducive to seed sprouting growth;
The method of C, germination vernalization:
After first super purple sweet potato seed being soaked seed 2-3 hour in the warm water of 25 DEG C-30 DEG C, pull out, spread out and dry 10-15 minute, the super purple sweet potato seed suctioning moisture is placed in the gunnysack or straw bag bag soaked with 30 DEG C of warm water, lie in environmental temperature at 20 DEG C-25 DEG C, can artificially create applicable temperature, relative moisture is carry out germination vernalization under the condition of 65%-80%; Every day, check 2-4 time, find scene temperature or humidity on the low side, can suitably temperature adjustment or appropriate spraying warm water be humidified; Through 8-10 days, namely can sprout successively; When bud grows to 1-2 centimetre, super purple sweet potato seed just can at seeding in nursery bed;
2), insulating box (room) germination germination accelerating method:
First super purple sweet potato seed is selected, disinfected, with 30 DEG C of thermostatted water seed soaking after 1-2 hour, seed through seed soaking is pulled out, spread out and dry 10-15 minute, the super purple sweet potato seed suctioning moisture is placed in the gunnysack or straw bag bag soaked with 30 DEG C of warm water, in the insulating boxs of 20 DEG C-25 DEG C (room), relative moisture is under the condition of 65%-80%, carries out the germination vernalization to super purple sweet potato seed; Through 8-10 days, namely can sprout successively, when bud grows to 1-2 centimetre, super purple sweet potato seed just can at seeding in nursery bed;
(3), seeding in nursery bed cultivates the method in super purple sweet potato strong sprout:
Select the leeward ground, seedbed being rich in organic matter faced south, first execute and make decomposed manure by oneself, carry out seedbed; By super purple sweet potato seed head-up, tail down, is tiltedly planted on seedbed, is accomplished that head is concordant, spacing 2-3 centimetre; Get sprayer 25 DEG C of-30 DEG C of warm water seed is squirted, cover fine earth, execute the people's muck that becomes thoroughly decomposed, after covering the straw of 1-2 cm thick, allow straw absorb sunlight temperature, improve ground temperature, then cover mulch film, then cover sky film, heat and moisture preserving; During nurturing staff, focus on accepting sunlight and ventilating in time, water, seedling bed temperature is controlled at 20 DEG C-25 DEG C; When growing to more than 20 centimetres to potato seedling, just can cut seedling, get seedling, seedling is inserted into large field and go;
(4) ridge and soil melioration wholely, is done:
1), the whole ground of super purple sweet potato will shift to an earlier date and deep ploughed in 1 week-2 week; Nonirrigated farmland to deep plough 40 centimetres, paddy field need deep plough 50 centimetres, tillage pan be broken, be beneficial to rainwater diafiltration, avoid field ponding;
2), combine deep ploughing, every mu adopts homemade decomposed manure 4500 kilograms-5000 kilograms, improvement soil;
3) decomposed manure method is made by oneself: adopt with chicken manure, duck excrement, pig manure, horse, ox, sheep barnyard manure, night soil, corn, sorghum straw, green manure, straw, sugarcane skin, rice chaff, organic waste etc. are raw material, carry out Harmless process the first half: at summer or high temperature season in fertilising, straw, green manure, sugarcane skin etc. are cut off and mixes with other raw material, add 2% ~ 3% lime, water-sprinkling mix wet, pile up, plastic covering film, make its abundant fermentation maturity; Yeast phase heap in temperatures as high 60 DEG C ~ 70 DEG C, can effectively kill in farm organic fertilizer with sick worm and crop smothering, and process after organic manure easily absorbed by super purple sweet potato;
4), do ridge requirement: row spacing 75 centimetres, ridge sound stage width 55 centimetres, ridge is high 25 centimetres, ridge face width 35 centimetres, and furrow is wide 20 centimetres; Adopt zanjon, micro-ridge, single file planting patterns; Before doing ridge, Xian Walong center cunette, imbed the green manure cutting into 2-3 cun long in cunette portion, center, ridge: clover, safflower grass seed or blue or green broad bean straw and so on, the green manure thickness imbedded is 5-8 centimetre; Self-control decomposed manure is evenly applied above the green manure imbedded bottom the ditch of center, ridge; Above the self-control decomposed manure applied, every mu of sealing fertilizer 50 kilograms-80 kilograms, superphosphate 10 kilograms-20 kilograms, ash 5-10 makes ridge after carrying on a shoulder pole; After doing ridge, take advantage of soil moistening, a weed killer herbicide be played and prevent weed growth;
5), plant super purple sweet potato before, be control of grubs harm, adopt chemicals treatment soil; Use 50% phoxim emulsifiable concentrate, every mu of consumption 200 ~ 250 grams, adds water 10 times, is sprayed on 20 ~ 35 kilograms of fine earths mix thoroughly to make pesticide-clay mixture, along ridge row replacement; Maybe this pesticide-clay mixture is spread on kind of ditch or ground, or be mixed into self-control decomposed manure in use;
(5), early plant in good time;
The plantation of super purple sweet potato, when spring, temperature was at 15 DEG C, just can cuttage, cutting time is more early better, to increase effective vegetative period of super purple sweet potato, improves the output of super purple sweet potato; Spring plants super purple sweet potato in late April to mid-May, with cuttage as well;
(6), super purple sweet potato cottage method:
1), oblique cutting method: the super purple sweet potato long 18-22 centimetre in strong sprout of clip, has 4-5 joint; Seedling bar becomes miter angle with face, ridge, uses scuppit borehole, is inserted by seedling bar in the soil of ridge, with the real earth of ten finger pressures, allows seedling bar plant into ridge soil 2 joint, exposes 2-3 joint;
2), Using Horizontal Bridgman Method: the super purple sweet potato long 20-24 centimetre in strong sprout of clip, has 5 joints; Seedling bar becomes contour cultivation with face, ridge, with scuppit in the ditching of face, ridge, by the soil of seedling bar contour cultivation ridge, refers to ridging compacting earth, plant into 3 joints, expose 2 joints with ten;
3), more piece Using Horizontal Bridgman Method: the super purple sweet potato long 50-80 centimetre in strong sprout of clip, has 10-15 joint; Seedling becomes contour cultivation with face, ridge, with scuppit in the ditching of face, ridge, by the soil of seedling contour cultivation ridge, refers to ridging compacting earth with ten; Plant into 7-11 joint, expose 3-4 joint;
4), seminal propagation working system: every mu of super purple sweet potato field, first to scrape out in 665-667 " plantation fort ", " plantation fort " each diameter is 75 centimetres-80 centimetres, be the round pool of 45 centimetres-50 centimetres deeply, each " plantation fort " uses 50 kilograms, green manure, self-control decomposed manure 60 kilograms-70 kilograms, composite fertilizer 1 kilogram-1.2 kilograms, first bury under " plantation fort " and put green manure, self-control decomposed manure is applied again on green manure, above self-control decomposed manure, evenly apply composite fertilizer, above composite fertilizer, cover loosening the soil of 20 cm thicks; " plantation fort " is made between surrounding senior middle school low, is beneficial to keep " plantation fort " interior soil moisture, impels super purple sweet potato to grow fast, outside each " plantation fort ", be with drain ditch, and each drain ditch ditch ditch is connected, can arrange and easily fill with; Utilize super purple sweet potato seed, super purple sweet potato seed is planted in " plantation fort " center, allow the potato rattan of super purple sweet potato seed growth, arbitrarily to all the winds extending, when the potato rattan of super purple sweet potato seed is stretched to 35-40 centimetre to surrounding, is in the circumference range of 20 centimetres by being the radius in the center of circle according to super purple sweet potato seed, cover with the earth of humidity, thickness of earth covering, at 20 centimetres-25 centimetres, earthing is executed the people's muck that becomes thoroughly decomposed, and allows to be taken root knot potato by the potato rattan internode that earth covers; When etc. super purple sweet potato stem and leaf, to be stretched to from super purple sweet potato seed be the 65-75 centimetre in the center of circle, again between the circumference range of radius 45-55 centimetre from super purple sweet potato seed being the center of circle, cover super purple sweet potato stem and leaf with the earth of humidity, thickness of earth covering is at 20 centimetres-25 centimetres; And become thoroughly decomposed people's muck with executing and combine the method for spraying fertilization of leaves, cultivate the super purple sweet potato being covered rattan joint by earth;
5), vertically plant hydroponics: select anosis super purple sweet potato tendril head, the super purple sweet potato long 20-25 centimetre in strong sprout of clip, there is 5-6 joint; Remove by the sub-two panels of root lateral lobe, carry out vertically inserting strong sprout and plant: seedling bar and face, ridge degree in a vertical angle, use scuppit borehole, seedling bar is vertically inserted in the soil of ridge, refer to ridging compactings with ten; Plant into 2 joints, expose 3-4 joint;
(7), rational close planting:
According to soil property, fertility and rattan seedling characteristic, determine rational cutting density; Adopt ridge kind method, spacing in the rows 30-35 centimetre, line-spacing 68-72 centimetre, every mu of cuttage purple sweet potato seedling 3400-3700 strain; Adopt seminal propagation working system, every mu is " plantation fort " 665-667, plants super purple sweet potato seed 665-667;
(8), field management:
1), after super purple sweet potato seedling plants one week, seedling be looked into, fill the gaps with seedlings, guarantee full stand;
2), after super purple sweet potato seedling plantation first quarter moon, when finding weed growth, carry out chemical weed control with the Acetochlor of 150 times every mu, consumption every mu 100 grams, sprayer adds water 4, sprays weeding; Or with artificial weeding;
3), in whole super purple sweet potato to intertill 2-3 time vegetative period, in conjunction with intertill and clean tillage, loosen the soil, earth up, support ridger, fertilising;
4), super purple sweet potato is afraid of stain, is afraid of flood, and rainy season wants timely draining; During arid, water timely anti-morning, spraying fertilizer; Will pour water in field ditch in time when arid is serious, impose foliage fertilizer, occur 4-5 fine day summer continuously, water once to super purple sweet potato, the super purple sweet potato of every strain waters the water of 1 kilogram, or waters the fertile 600-800 gram of loose stool;
5), tendril is carried:
When carrying tendril, accomplish " four are not ": do not turn over rattan, do not trample cauline leaf, do not pull apart cauline leaf, do not hinder cauline leaf; After carrying tendril, tendril is put in original place, not upset tendril direction, be conducive to strengthening photosynthesis, improve super purple sweet potato output;
6), 8, September, there is typhoon or arid is special sends out weather, the combating typhoon of super purple sweet potato be carried out, prevent waterlogging and drought relief work; There is prolonged drought, weather short of rain, carry out and water, pour water, fertilising work;
7), spraying fertilizer, 7, August divides, and spraying fertilizer, monthly spraying fertilizer 1-2 time, executes the human excrement 800 kilograms-1000 kilograms that becomes thoroughly decomposed for every mu, impel super purple sweet potato block to expand; To late September, the major way mending potassium sprays foliage fertilizer, 400g/ mu. execute, 0.3% potassium dihydrogen phosphate aqueous solution 50 kilograms-60 kilograms; Or every mu with ash leachate 150 kilograms-200 kilograms, spray;
(9), prevention and elimination of disease and pests:
To prevent eliminating aphis vegetative period in super purple sweet potato, purple potato tortrix moth, golden devil, prodenia litura insect; Find aphid, with 10%1 than worm quinoline, every mu of medication 10 grams-15 grams, to 40 kilograms-60 kilograms, water, evenly sprays; When finding super purple sweet potato tortrix moth, golden devil, with 48% Le Siben EC, every mu of consumption 30ml, water distribution 1000-1500 times liquid, sprays; Find prodenia litura, every mu of use 1% missible oil 15 ~ 25 grams, to 50 kilograms ~ 60 kilograms, water, contain in low instar larvae and send out a phase even spraying, or use Du Pont's safety hit, every mu fills 1 bag with 5ml, and water distribution 3000 times, sprays;
(10) gather in time:
When the temperature of the growing environment of super purple sweet potato is lower than 15 DEG C, when entering autumn and winter season, after super purple sweet potato comes to the ripening period, should excavate in time and gather;
The super purple sweet potato preparing breeding in the coming year field, in support several days more, make super purple sweet potato potato block ripe, after having dug, under the sun, shine 2-3 days, make the drying of potato kind, and killing pathogenic bacteria; The super purple sweet potato taken is not divided and to pull open, and bunchiness preserve, reduces potato block wound, use cellar or the warming technology of moisturizing, and guarantee potato kind is survived the winter quality.
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| CN105191661A (en) * | 2015-11-13 | 2015-12-30 | 周福进 | High-yield cultivation method of planting sweet potatoes in summer and autumn |
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