Summary of the invention
Technical problem to be solved by this invention is to select, create selenium-rich purple sweet potato milpa; Adopt selenium-rich purple sweet potato kind to cultivate selenium-rich purple sweet potato strong sprout, use culture technique, the method for selenium-rich purple sweet potato, carry out the cultivation of selenium-rich purple sweet potato and management, carry out the extermination of disease and insect pest of selenium-rich purple sweet potato, timely collecting selenium-rich purple sweet potato, by the practice of the purple sweet potato of cultivation of selenium-rich, summing up experience, put forward the methods, change the situation that current selenium-rich purple sweet potato is little, yield poorly, a kind of high-yield cultivating method of selenium-rich purple sweet potato is provided, makes the selenium-rich purple sweet potato per mu yield of producing reach the high-yield culture technique of ten thousand jin.
The high-yield cultivating method that the object of this invention is to provide a kind of selenium-rich purple sweet potato, realizes ten thousand jin of selenium-rich purple sweet potatos of per mu yield.
Technical characteristics of the present invention is: select, create selenium-rich purple sweet potato milpa; Adopt selenium-rich purple sweet potato kind to cultivate selenium-rich purple sweet potato strong sprout, use culture technique, the method for selenium-rich purple sweet potato, carry out the cultivation of selenium-rich purple sweet potato and management, carry out the extermination of disease and insect pest of selenium-rich purple sweet potato, timely collecting selenium-rich purple sweet potato, obtains the high-quality through cultivating, the selenium-rich purple sweet potato of high yield in enormous quantities, leads modern agriculture plantation selenium-rich purple sweet potato, offer domestic and international market, meet people's consumption demand.
The concrete technology of invention is:
1, the selection of purple sweet potato milpa and establishment:
(1) according to being applicable to selenium-rich purple sweet potato habit and production factors, select and create milpa.Select different soil to have different impacts to the product quality of selenium-rich purple sweet potato, output; Should be according to applicable selenium-rich purple sweet potato habit and production factors, select soil: select the sand soil that is rich in organic black, purple, yellow mud chiltern ground; Require physical features 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, and row, Rang be 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 selenium-rich purple sweet potato milpa;
(2) selenium-rich purple sweet potato belongs to short day crop, and it needs sufficient sunlight, select to make a clear distinction between the four seasons, sunshine is sufficient, and the temperate zone milpa of pleasant Climate creates selenium-rich purple sweet potato ground.Adapt to most selection and the establishment of selenium-rich purple sweet potato milpa, select Huo Fuxi field, rich selenium hillside fields on the sunny side to plant purple sweet potato.
(3) selection of selenium-rich purple sweet potato milpa will adapt with local amblent air temperature condition with establishment.18 ℃-30 ℃ of selenium-rich purple sweet potato cauline leaf growth thermophilics, temperature stops growing lower than 15 ℃, and temperature just can normal growth at 18 ℃; It is 21 ℃-25 ℃ that potato piece expands the suitableeest temperature, and ground temperature stops expanding lower than 20 ℃, surpasses 35 ℃ of growth retardations.The selection of selenium-rich purple sweet potato milpa will adapt with the environmental requirement of above-mentioned purple sweet potato growth with establishment.
(4) selenium-rich purple sweet potato leaf water transpiration rate is large, demand is large, in cauline leaf peak of growing season, and the key element that soil moisture content is advisable with 55%-80%; To be created in that the rainfall is plentiful selenium-rich purple sweet potato, there is the numerous and confused climate characteristic of rain between Clear and Bright, autumnal equinoctial period, extremely adapt to the growth of selenium-rich purple sweet potato, selection and the establishment of selenium-rich purple sweet potato milpa require pleasant Climate, arrange, pour water field, the plot in area easily.
(5) selenium-rich purple sweet potato has the stain of fearness, is afraid of flooded feature.The selection of selenium-rich purple sweet potato milpa requires without typhoon, without flood, without drought with establishment.
(6) be applicable to selenium-rich purple sweet potato cauline leaf growth thermophilic at 15 ℃-35 ℃, temperature stops growing lower than 15 ℃, surpasses 35 ℃ of growth retardations.The weather that throughout the year adapts to selenium-rich purple sweet potato growth will have about 230 days, increased effective vegetative period of purple sweet potato, can make the production output of selenium-rich purple sweet potato high, the harvest that quality is good, land utilization rate is high, good in economic efficiency.
2, selenium-rich purple sweet potato is cultivated condition and the method in strong sprout
(1), the condition of selenium-rich purple sweet potato seed sprouting vernalization.
The optimal temperature conditions of selenium-rich purple sweet potato seed sprouting vernalization is between 15 ℃-25 ℃, surpasses 30 ℃ and hinders seed sprouting and the growth of young stem, should not sow.According to the required temperature condition of selenium-rich purple sweet potato seed sprouting vernalization, we are in order to improve the output of selenium-rich purple sweet potato, increase effective vegetative period of rich selenium purple, accomplish to cultivate strong sprout ahead of time, reach the object of early planting good harvest, must, manually to find or to create the condition of a kind of selenium-rich purple sweet potato seed sprouting vernalization, to adapt to its germination vernalization, cultivate early strong sprout.
The germination vernalization of the southern selenium-rich purple sweet potato seed of China and sowing can be chosen in spring, Xia Liangji, and the germination vernalization sowing of one season of late spring can be selected in the north.
(2), the method for selenium-rich purple sweet potato seed sprouting vernalization:
1., the method for artificial thermophilic germination vernalization:
Spring, south China round the clock temperature more than 15 ℃, below 22 ℃, the vernalization of suitable selenium-rich purple sweet potato seed sprouting and sowing.Because selenium-rich purple sweet potato seed stature is not of uniform size, seed winter dormancy deep mixed, germinates slowly at 15 ℃ below, and the seeding stage is long, for accelerating its germination, emerging to adopt following methods:
A, bask seeds: select the selenium-rich purple sweet potato seed of the high-quality of a year, before germination vernalization, select the fine day 2-3 days that basks seeds, guarantee that seed water suction is consistent, germinate neat.And carry out the disinfection to selenium-rich purple sweet potato seed.
B, seed soaking: the 2-3 hour that before sowing, selenium-rich purple sweet potato seed soaked seed in the warm water of 25 ℃-30 ℃, to improve the temperature of seed, activate the growth activity of seed cell, be conducive to seed sprouting growth.
The method of C, germination vernalization:
First selenium-rich purple sweet potato seed is soaked seed after 2-3 hour in the warm water of 25 ℃-30 ℃, pull out, spread out and dry 10-15 minute, the selenium-rich purple sweet potato seed that suctions moisture is placed in the gunnysack or straw bag bag soaking with 30 ℃ of warm water, lie in environmental temperature at 20 ℃-25 ℃, can artificially create applicable temperature, under the condition that relative moisture is 65%-80%, or be 20 ℃ of-30 ℃ of vernalization of germinateing in moisture meter humidity.Every day, checks 2-4 time, finds that scene temperature or humidity are on the low side, suitably temperature adjustment or the warm water humidification of spraying in right amount.Generally, after 8-10 days, can sprout successively; When bud grows to 1-2 centimetre, selenium-rich purple sweet potato seed just can be at seeding in nursery bed.
2., insulating box (chamber) germination germination accelerating method:
In the selenium-rich purple sweet potato cultivating seeds with good conditionsi factory in strong sprout, can use in insulating box (chamber) and control temperature at 20 ℃-25 ℃, relative moisture is under the condition of 65%-80%, or is 20 ℃ of-30 ℃ of germination vernalization of carrying out selenium-rich purple sweet potato seed in moisture meter humidity.
First selenium-rich purple sweet potato seed is selected, disinfected, after soaking seed 1-2 hour with 30 ℃ of thermostatted waters, to pull out through the seed of seed soaking, spread out and dry 10-15 minute, the selenium-rich purple sweet potato seed that suctions moisture is placed in the gunnysack or straw bag bag soaking with 30 ℃ of warm water, in the insulating box (chamber) of 20 ℃-25 ℃, relative moisture is under the condition of 65%-80%, carry out the germination vernalization to selenium-rich purple sweet potato seed, through 8-10 days, can sprout successively, when bud grows to 1-2 centimetre, selenium-rich purple sweet potato seed just can be at seeding in nursery bed.
(3), seeding in nursery bed is cultivated the selenium-rich purple sweet potato method in strong sprout:
Select leeward face south be rich in ground, organic seedbed, first execute and make decomposed manure by oneself, carry out seedbed; By selenium-rich purple sweet potato seed head-up, tail down, is tiltedly planted on seedbed, accomplishes that head is concordant, spacing 2-3 centimetre; Getting sprayer squirts seed with 25 ℃ of-30 ℃ of warm water, cover fine earth, execute the people's muck that becomes thoroughly decomposed, cover after the straw of 1-2 cm thick, allow straw absorb sunlight temperature, improve ground temperature, cover again mulch film, then cover a day film, heat and moisture preserving, while cultivating strong sprout, focus on accepting sunlight and ventilating in time, water.While growing to more than 20 centimetres to potato seedling, just can cut seedling, get seedling, seedling is inserted into large field.
3, select soil.
Select different soil to have different impacts to the product quality of selenium-rich purple sweet potato, output; Should, according to applicable selenium-rich purple sweet potato habit and production factors, select soil: require to select to be rich in organic black, purple, sand soil; Or be rich in the soil of organic yellow soil quality; Select that the soil is porous, 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, and row, Rang be soil easily, soil pH 4.8-7.6; The temperate zone milpa that selection is made a clear distinction between the four seasons, weather is got married creates selenium-rich purple sweet potato milpa.
4, wholely, do ridge and soil melioration.
1), the high yield of selenium-rich purple sweet potato, good harvest need dark, loose, alive, moist, fertile good soil environment; Selenium-rich purple sweet potato requires within 1 week-2 weeks, to deep plough in advance wholely; Will deep plough 30 centimetres, paddy field of general nonirrigated farmland need be deep ploughed 40 centimetres, break tillage pan, are beneficial to rainwater diafiltration, avoid field ponding.
2), in conjunction with deep ploughing, every mu adopts 4500 kilograms-5000 kilograms of homemade decomposed manures, improvement soil.
3) 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 processing the first half: at summer or high temperature season in fertilising, straw, green manure, sugarcane skin etc. are cut off and mixed with other raw material, add 2%~3% lime, that water-sprinkling is mixed is wet, accumulation, plastic covering film, makes its abundant fermentation maturity.In yeast phase heap temperature up to 60 ℃~70 ℃, can effectively kill in farm organic fertilizer with sick worm and crop smothering, and the organic manure after processing is easily absorbed by selenium-rich purple sweet potato.
4), do ridge and require: 75 centimetres of row spacings, 55 centimetres of ridge sound stage widths, ridge is high 25 centimetres, 35 centimetres of ridge face widths, furrow is wide 20 centimetres.Adopt zanjon, micro-ridge, single file planting patterns.Do before ridge, first dig furrow, in furrow bottom, imbed and cut into 2-3 cun of long green manure: clover, safflower grass seed or blue or green broad bean straw and so on, the green manure thickness of imbedding is 5-8 centimetre; Above the green manure of imbedding in furrow bottom, evenly apply self-control decomposed manure; Above the self-control decomposed manure applying, 50 kilograms-80 kilograms of every mu of sealing fertilizers, 10 kilograms-20 kilograms of superphosphate, after ash 5-10 load, make ridge; Do behind ridge, take advantage of soil moistening, play a weed killer herbicide and prevent weed growth.
5), plant before selenium-rich purple sweet potato, be control of grubs harm, adopt chemicals treatment soil; Use 50% phoxim emulsifiable concentrate, 200~250 grams every mu, add 10 times, water, be sprayed on 20~35 kilograms of fine earths and mix thoroughly and make pesticide-clay mixture, along ridge row replacement; Maybe this pesticide-clay mixture is spread on to kind of ditch or ground, or sneaks in self-control decomposed manure and use; Or with 2% Isofenphos methyl powder, mix 20~35 kilograms of fine earths for 2~3 kilograms every mu and make pesticide-clay mixture, row replacement; Or with 3% Isofenphos methyl granule or 5% phoxim granule, or 5% diazinon granule, process soil for 2.2~3.2 kilograms every mu.
5, early plant in good time:
The plantation of selenium-rich purple sweet potato, when spring, temperature was at 15 ℃, just can cuttage, cutting time is more early better, to increase effective vegetative period of purple sweet potato, improves the output of purple sweet potato; Spring plant selenium-rich purple sweet potato in late April to mid-May, with cuttage for well.
6, selenium-rich purple sweet potato cottage method:
The quality of selenium-rich purple sweet potato cottage method, directly affects output and the quality of selenium-rich purple sweet potato, selenium-rich purple sweet potato cottage method:
(1), oblique cutting method: clip selenium-rich purple sweet potato long 18-22 centimetre in strong sprout, has 4-5 joint; Seedling bar becomes miter angle with ridge face, uses scuppit borehole, and seedling bar is inserted in the soil of ridge, with the real earth of ten finger pressures, allows seedling bar plant into ridge soil 2 joints, exposes 2-3 joint.This kind of method cuttage, between offspring knot, ties purple sweet potato more, generally can tie 5-8 selenium-rich purple sweet potato, multipotency is tied more than 10, and the shape of the selenium-rich purple sweet potato of tying is as big or small in goose egg, 80 grams-150 grams of individual weights, the shape of maximum selenium-rich purple sweet potato is as fist size, individual heavy 150 grams-250 grams, and the individual of maximum focuses on 1200 grams-1500 grams, the heavy output of the average strain of selenium-rich 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: clip selenium-rich purple sweet potato long 20-24 centimetre in strong sprout, has 5 joints; Seedling bar becomes contour cultivation with ridge face, with scuppit, in ridge face ditching, in the soil of seedling bar contour cultivation ridge, with ten finger ridging compacting earth, plants into 3 joints, exposes 2 joints.Using Horizontal Bridgman Method plantation selenium-rich purple sweet potato, between offspring knot, knot selenium-rich purple sweet potato a lot, generally can tie 6-15 selenium-rich purple sweet potato, the selenium-rich purple sweet potato body of tying less, shape is as egg size, individual heavy 50 grams-80 grams, maximum selenium-rich purple sweet potato is as goose egg size, individual heavy 80 grams-150 grams, the average strain of selenium-rich 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: clip selenium-rich purple sweet potato long 50-80 centimetre in strong sprout, has 10-15 joint; Seedling becomes contour cultivation with ridge face, uses scuppit in ridge face ditching, in the soil of seedling contour cultivation ridge, with ten fingers ridging compacting earth; Plant the joint into 7-11, expose 3-4 joint.More piece Using Horizontal Bridgman Method plantation selenium-rich purple sweet potato, between each root knot, ties purple potato several, generally can tie a purple potato 25-45 selenium-rich purple sweet potato, the selenium-rich purple sweet potato body of tying very little, the average strain of selenium-rich purple sweet potato focuses on 1000 grams-1850 grams, 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 selenium-rich purple sweet potato field, first scrape out 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, 60 kilograms-70 kilograms of decomposed manures of self-control, 1 kilogram-1.2 kilograms of composite fertilizers, under " plantation fort ", first bury and put green manure, on green manure, apply again self-control decomposed manure, above evenly applying composite fertilizer , composite fertilizer above self-control decomposed manure, cover loosening the soil of 20 cm thicks; Utilize the seed after selenium-rich purple sweet potato seminal propagation seedling, selenium-rich purple sweet potato seed is planted in " plantation Bao” center, allow the potato rattan of selenium-rich purple sweet potato seed growth, arbitrarily to all the winds extend, when the potato rattan of selenium-rich purple sweet potato seed is stretched to 35-40 centimetre to surrounding, by the radius that is the center of circle according to selenium-rich purple sweet potato seed, be in the circumference range of 20 centimetres, with moist earth, cover, thickness of earth covering is at 20 centimetres-25 centimetres, on earthing, execute the people's muck that becomes thoroughly decomposed, allow the potato rattan internode that covered by the earth knot potato of taking root; In selenium-rich purple sweet potato rattan, to be stretched to from selenium-rich purple sweet potato seed be the center of circle 65-75 centimetre time, again between the circumference range of the radius 45-65 that is the center of circle from selenium-rich purple sweet potato seed centimetre, with moist earth, cover selenium-rich purple sweet potato rattan, thickness of earth covering is at 20 centimetres-25 centimetres; And by the method for executing become thoroughly decomposed people's muck and combination spray fertilization of leaves, cultivate the selenium-rich purple sweet potato that is covered rattan joint by earth; The selenium-rich purple sweet potato of cultivating by this kind of method, when results, generally can gather in the crops each heavy 250 grams of-1500 grams of selenium-rich purple sweet potato, can obtain maximum selenium-rich purple sweet potato and focus on 2 kilograms-4 kilograms, each " plantation fort " can gather in the crops the selenium-rich purple sweet potato of 45-65 kilogram, the highest per mu yield can reach 3200 kilograms-3800 kilograms, large with this kind of method plantation selenium-rich purple sweet potato shape, output is high, quality good.
(5), vertically plant hydroponics: select anosis selenium-rich purple sweet potato tendril head, clip selenium-rich purple sweet potato long 20-25 centimetre in strong sprout, has 5-6 joint; Remove by two of root lateral lobe, carry out inserting strong sprout and plant; Seedling bar and ridge face degree in a vertical angle, use scuppit borehole, seedling bar vertically inserted in the soil of ridge, with ten finger ridging compactings; Plant into 2 joints, expose 3-4 joint.This kind of method cuttage, between offspring knot, tie purple sweet potato less, generally can tie 3-5 selenium-rich purple sweet potato, the selenium-rich purple sweet potato of tying individual large, single selenium-rich purple sweet potato focuses on 400 grams-750 grams, maximum single selenium-rich 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. 10000 jin of per mu yields, large with this kind of method plantation selenium-rich purple sweet potato shape, 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, the every mu of purple sweet potato seedling of cuttage 3400-3700 strain.Adopt seminal propagation working system, be " plantation fort " 665-667 for every mu, plant selenium-rich purple sweet potato seed 665-667.
8, field management:
(1), selenium-rich purple sweet potato seedling plants after one week, look into seedling, fill the gaps with seedlings, and guarantees full stand.
(2), after selenium-rich purple sweet potato seedling plantation first quarter moon, while finding weed growth, with the Acetochlor of 150 times every mu, carry out chemical weed control, 100 grams every mu of consumptions, sprayer adds 4, water, sprays weeding; Or use artificial weeding.
(3), at whole selenium-rich purple sweet potato, will intertill 2-3 time vegetative period, in conjunction with intertill and clean tillage, loosen the soil, ridging, support ridger, fertilising.
(4), selenium-rich purple sweet potato is afraid of stain, is afraid of waterlogging, in rainy season, timely draining.During arid, timely drought resisting to water, spraying fertilizer; When arid is serious, to pour water in time in field ditch, impose foliage fertilizer.
(5) carry tendril.Carry tendril and can lift the selenium-rich purple sweet potato tendril corings that are tied in side, ridge or bottom of trench at different levels, be conducive to stop between tendril, tie potato piece, make concentrating and effective photosynthesis of nutrient, impel expanding of the purple potato stem tuber of rich selenium, generally can increase production 50%-80%.While 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, and can impel axillalry bud that new skill and leaflet occur, reduce photosynthesis, cause the underproduction; Enter rainy season, selenium-rich purple sweet potato tendril is raw adventive root easily, easily disperses nutrient, should mention gently selenium-rich purple sweet potato tendril, lifts after adventive root, then replaces, and to reach the growth that suppresses tendril adventive root, makes nutrient concentrate on the object of potato piece; Carry after tendril, tendril is put in to original place, do not upset tendril direction, be conducive to strengthen photosynthesis, improve selenium-rich purple sweet potato output.
(6), 8, September, have diastrous weather and occur, there will be the special weather of sending out such as typhoon or arid, carry out the combating typhoon of selenium-rich purple sweet potato, prevention 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, divide August, spraying fertilizer, monthly spraying fertilizer is 1-2 time, executes 800 kilograms-1000 kilograms of the human excrements of becoming thoroughly decomposed, impels selenium-rich purple sweet potato piece to expand for every mu; To late September, temperature starts to decline, purple potato Root Absorption ability, and now the potash fertilizer requirement of purple potato increases, the major way of mending potassium is to spray foliage fertilizer, 400g/ mu. execute, 0.3%-60 kilograms of 50 kilograms of potassium dihydrogen phosphate aqueous solutions, energy amount of increase in production is at 10%-20%.Or every mu spray with 150 kilograms-200 kilograms of ash leachates, can increase the output of selenium-rich purple sweet potato.
9, prevention and elimination of disease and pests
At selenium-rich purple sweet potato, to prevent eliminating aphis vegetative period, purple potato tortrix moth, golden devil, the insects such as prodenia litura.Find aphid, use 10% Imidacloprid, 10 grams-15 grams of every mu of medications, to 40 kilograms-60 kilograms, water, evenly spray; While finding selenium-rich 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, 15 grams~25 grams of every mu of use 1% missible oil, to 50 kilograms~60 kilograms, water, contain and send out the safety hit of phase even spraying ,Huo Yong Du Pont in low instar larvae, and every mu fills 1 bag with 5ml, and 3000 times of water distributions, spray.
10, gather in time.
When the temperature of the growing environment of selenium-rich purple sweet potato is during lower than 15 ℃, while entering autumn and winter season, after selenium-rich purple sweet potato comes to the ripening period, should excavate and gather in time.
The selenium-rich purple sweet potato of preparing breeding in the coming year field, in to support several days more, make selenium-rich purple sweet potato potato piece ripe, after having dug, under the sun, shine 2-3 days, potato kind is dried, and killing pathogenic bacteria.The purple sweet potato taking is not divided and pulls open, and bunchiness storage, reduces potato piece wound, uses cellar or the warming technology of moisturizing, the assurance potato kind quality of surviving the winter.
By enforcement of the present invention and application, not only changed the product quality of selenium-rich purple sweet potato, in little purple sweet potato in the past becomes, the selenium-rich purple sweet potato of large.And broken the per mu yield that people in the past plant selenium-rich purple sweet potato and hovered 1500 kilograms of-2000 kilograms of balky situations always, create and realized selenium-rich purple sweet potato per mu yield and reached the domestic and international new record of high yield and bumper harvest of ten thousand jin.
Embodiment
Example 1: seminal propagation working system:
Every mu of selenium-rich purple sweet potato ground, first scrape out 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, 60 kilograms-70 kilograms of decomposed manures of self-control, 1 kilogram-1.2 kilograms of composite fertilizers, under " plantation fort ", first bury and put green manure, on green manure, apply again self-control decomposed manure, above evenly applying composite fertilizer , composite fertilizer above self-control decomposed manure, cover loosening the soil of 20 cm thicks; Utilize the seed after selenium-rich purple sweet potato seminal propagation seedling, selenium-rich purple sweet potato seed is planted in " plantation Bao” center, allow the potato rattan of selenium-rich purple sweet potato seed growth, arbitrarily to all the winds extend, when the potato rattan of selenium-rich purple sweet potato seed is stretched to 35-40 centimetre to surrounding, by the radius that is the center of circle according to selenium-rich purple sweet potato seed, be in the circumference range of 20 centimetres, with moist earth, cover, thickness of earth covering is at 20 centimetres-25 centimetres, on earthing, execute the people's muck that becomes thoroughly decomposed, allow the potato rattan internode that covered by the earth knot potato of taking root; In selenium-rich purple sweet potato rattan, to be stretched to from selenium-rich purple sweet potato seed be the center of circle 65-75 centimetre time, again between the circumference range of the radius 45-65 that is the center of circle from selenium-rich purple sweet potato seed centimetre, with moist earth, cover selenium-rich purple sweet potato rattan, thickness of earth covering is at 20 centimetres-25 centimetres; And by the method for executing become thoroughly decomposed people's muck and combination spray fertilization of leaves, cultivate the selenium-rich purple sweet potato that is covered rattan joint by earth; The selenium-rich purple sweet potato of cultivating by this kind of method, when results, generally can gather in the crops each heavy 250 grams of-1500 grams of selenium-rich purple sweet potato, can obtain maximum selenium-rich purple sweet potato and focus on 2 kilograms-4 kilograms, each " plantation fort " can gather in the crops the selenium-rich purple sweet potato of 45-65 kilogram, the highest per mu yield can reach 3200 kilograms-3800 kilograms, large with this kind of method plantation selenium-rich purple sweet potato shape, output is high, quality good.
Example 1: do ridge and vertically plant hydroponics:
The high yield of selenium-rich purple sweet potato, good harvest need dark, loose, alive, moist, fertile good soil environment.Selenium-rich purple sweet potato ridge requires within 10 days-20 days, to deep plough in advance; Generally early will deep plough 30 centimetres, paddy field need be deep ploughed 40 centimetres, break tillage pan, are beneficial to rainwater diafiltration, avoid field ponding.
In conjunction with deep ploughing, every mu adopts 4500 kilograms-5000 kilograms of homemade decomposed manures, improvement soil.
Self-control decomposed manure, employing is 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, in fertilising, carry out Harmless processing the first half: at summer or high temperature season, straw, green manure, sugarcane skin etc. are cut off and mixed with other raw material, add 2%~3% lime, that water-sprinkling is mixed is wet, accumulation, plastic covering film, makes its abundant fermentation maturity.In yeast phase heap temperature up to 60 ℃~70 ℃, can effectively kill in farm organic fertilizer with sick worm and crop smothering, and the organic manure after processing is easily absorbed by selenium-rich purple sweet potato.
Doing ridge requires: 75 centimetres of row spacings, and 55 centimetres, ridge base, ridge is high 25 centimetres, 35 centimetres, ridge face, 20 centimetres, furrow.Adopt zanjon, micro-ridge, single file planting patterns.
Do before ridge, first dig furrow, in furrow bottom, imbed and cut into 2-3 cun of long green manure: clover, safflower grass seed or blue or green broad bean straw and so on, the green manure thickness of imbedding is 5-8 centimetre.
Above the green manure of imbedding in furrow bottom, evenly apply self-control decomposed manure.
Above the self-control decomposed manure applying, every mu sealing fertilizer 50-80 kilogram, superphosphate 10-20 kilogram, after ash 5-10 load, make ridge.
Do behind ridge, take advantage of soil moistening, play a weed killer herbicide and prevent weed growth.
Planting before selenium-rich purple sweet potato, is control of grubs harm, adopts chemicals treatment soil.Use 50% phoxim emulsifiable concentrate, 200~250 grams every mu, add 10 times, water, be sprayed on 20~35 kilograms of fine earths and mix thoroughly and make pesticide-clay mixture, along ridge row replacement; Maybe this pesticide-clay mixture is spread on to kind of ditch or ground, or sneaks in self-control decomposed manure and use; Or with 2% Isofenphos methyl powder, mix 20~35 kilograms of fine earths for 2~3 kilograms every mu and make pesticide-clay mixture, row replacement; Or process soil with 3% Isofenphos methyl granule, 2.2~3.2 kilograms every mu.
Select anosis selenium-rich purple sweet potato tendril head, clip selenium-rich purple sweet potato long 20-25 centimetre in strong sprout, has 5-6 joint; Remove by two of root lateral lobe, carry out inserting strong sprout and plant; Seedling bar and ridge face degree in a vertical angle, use scuppit borehole, seedling bar vertically inserted in the soil of ridge, with ten finger ridging compactings; 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, the every mu of purple sweet potato seedling of vertical cuttage 3400-3700 strain.
In conjunction with field management, fertilising, the extermination of disease and insect pest, carry out the cultivating and managing of ridge kind selenium-rich purple sweet potato.
Do ridge and vertically plant hydroponics, between offspring knot, knot selenium-rich purple sweet potato is less, generally can tie 3-5 selenium-rich purple sweet potato, the selenium-rich purple sweet potato of tying individual large, single selenium-rich purple sweet potato focuses on 400 grams-750 grams, maximum single selenium-rich 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. 10000 jin of per mu yields, large with this kind of method plantation selenium-rich purple sweet potato shape, output is high, better quality.