CN104472169B - The implantation methods of a kind of Muddy Bottoms heavy saline－ alkali area at seashore cotton - Google Patents

Abstract

The implantation methods that the invention provides a kind of Muddy Bottoms heavy saline－ alkali area at seashore cotton, concrete steps are: improve the soil and foster and apply fertilizer, slip ditch sowing, growing season management and results, other field management measures are with Routine Management method. The present invention is directed to strand shale heavy saline soil salt and soil texture feature, and the rule of alkaline land cotton growth, taking " improve the soil and foster and apply fertilizer " technology as basis, by Regulation in all life process cotton plant height, " two subtract " technology of controlling reasonable fruit branch number is safeguard, reaches alkaline land cotton increasing yield and improving quality.

Description

The implantation methods of a kind of Muddy Bottoms heavy saline－ alkali area at seashore cotton

Technical field

The invention belongs to beach saline land and administer and utilize technical field, be specifically related to a kind of Muddy Bottoms shoreThe implantation methods of sea heavy saline cotton.

Background technology

Beach saline land is the important land resources that DEVELOPMENT OF COTTON is produced, and is also to promote Cotton Production abilityPotentiality place. China's salt-soda soil gross area exceedes 5.2 hundred million mu, and wherein strand should have 1.4 hundred million mu in cotton regionSalt-soda soil, utilization has a high potential, and east, cotton region is moved becomes Ensuring Food Safety, stablizes cotton areaA strategic measure. The Salt-endurance of cotton is 0.4%, is the good industrial crops of salt tolerance, but cottonFlower is poor in germination and seeding stage salt tolerance, and is subject to strand harsh climate feature affects, saline and alkalineThe ground disconnected ridge, remaining green when it is due to become yellow and ripe late-maturing that often occurs being short of seedling in Cotton Production, causes yielding poorly, of poor benefits. For improvingCotton benefit is planted in salt-soda soil, and domestic Duo Jia unit has carried out alkaline land cotton planting technology from different perspectivesThe research of aspect, has obtained remarkable benefit. Wherein, " the different cropping pattern soil of Coastal region in eastern Hebei Province cottonSalt dynamics and the impact on emergence rate " (Wang Xiuping etc., " Agriculture of Anhui science " 2009,37 (34):16816-16817) a kind of alkaline land cotton implantation methods is disclosed in a literary composition. The method is thought salt-soda soilCotton slips ditch seeding method, the limes marginis of ditching sowing, and soil moisture content is easily grasped, and salinity is low, can effectively fallSalt, suppress the soil accumulation of salt in the surface soil in spring, reach the target of full stand and healthy seedling. Publication number CN102630451A, public affairsOpen a kind of low-lying waterlogging alkaline land cotton planting method. The method is to play prior to seeding large ridge, at great LongThe each plantation in middle part, slope a line cotton of both sides, by ridge polysalt, furrow draining, makes in great Long slopePortion's root region soil keeps lower salt content, suitable moisture, and realize and both alleviated cotton salt damage,Avoid again the concrete grammar of damage or crop failure caused by waterlogging simultaneously. Publication number CN101147447A, discloses a kind of moderate saline and alkalineGround cotton culture method, the method adopts the short season cotton kind about 115 days breeding times, mid-MaySowing after ground temperature gos up; Zanjon sowing is opened in employing, and covering with ground sheeting, emerges the pusher delayed release seedling time; CloseSpend 6000 plants/acre of left and right, do not prune, only pinch, the control of mepiquat chloride full range, final plant height is controlled at80cm left and right. Publication number CN101258809A, discloses a kind of alkaline land cotton pre-coating film seedling establishment sideMethod, the method is that thawed early spring in below the 0.4% and cotton field that has winter certain sleet to put aside in salt contentRear enforcement, is reached and is heated, puies forward moisture in the soil and press down salt action by pre-overlay film.

Above-mentioned known technology is mainly carried out mild or moderate from cropping pattern, kind selection, fertilizer practice angleAlkaline land cotton cultivation technique, under the support of serial moderate salt-soda soil plant cotton technology, cotton in lightDegree RS in Alkali Region cultivated area is larger, and better results to plant cotton, but be difficult in strand shale heavy saline cottonGerminate and emerge, and cotton in severe saline-alkali land plant cotton technology research in strand is less. According to retrieval, public affairsThe number of opening CN102301906A, discloses a kind of method of planting cotton in coastal heavy saline-alkali land, and the method is logicalCross consolidation, winter salt water freeze irrigate, spring salt water ice melt shower, covering with ground sheeting presses down salt soil moisture conservationDeng some row measures, reduce Levant Cotton Root layer soil salt content, ensure the normal growth of cotton. Publication numberCN102550192A, discloses a kind of cotton in severe saline-alkali land fertilization method, and the method at cotton stalk alsoOn the basis in field, employing quick-acting fertilizer combines with Controlled Release Fertilizer, soil fertilizer combines with foliage fertilizer, blade faceThe fertilizing method that combined fertile early stage with the later stage. These two patented technologies are respectively by the salt water technology of freezingSolve shortage of fresh water district and pressed salt problem, solved alkaline land cotton fertilizer loss by economic fertilizing methodProblem. According to domestic literature inquiry, for Muddy Bottoms heavy saline－ alkali area at seashore, with the salt reduction of improving the soil foster and apply fertilizer intoThe plant cotton technology research of key technology there is not yet report.

And Muddy Bottoms heavy saline－ alkali area at seashore soil total salt amount is high, the sticky weight of soil property, permeability extreme difference,The content of organic matter is low, cause cotton emerge difficulty, send out seedling difficulty; Heavy RS in Alkali Region, strand climate characteristic is springRainfall is few, and evaporation capacity is 3-3.9 times of rainfall, and summer, rainfall was concentrated, and wherein collected the most JulyIn, cause cotton field not send out seedling prosperous length in mid-term early stage, it is late-maturing that the later stage is remaining green when it is due to become yellow and ripe, affects output of cotton and quality.

Summary of the invention

The object of this invention is to provide the implantation methods of a kind of Muddy Bottoms heavy saline－ alkali area at seashore cotton, solveThe Muddy Bottoms heavy saline－ alkali area at seashore cotton that exists in prior art emerge complete, yield poorly, poor qualityProblem.

The technical solution adopted in the present invention is, the plantation side of a kind of Muddy Bottoms heavy saline－ alkali area at seashore cottonMethod, concrete steps are:

A, improve the soil and foster and apply fertilizer: use mid-April 1,000 thousand grams/acre of ardealites, humic acid double centner/mu,40,000 grams/acre of slow-release fertilizers, cow dung 7 side/mus, rake is revolved in deep ploughing makes above-mentioned fertilizer and 30 centimetres of dark soilMix;

The sowing of B, the ditch that slips: corrugate device is installed on rotary plow, revolve output simultaneously wide 60 centimetres, dark 30Centimetre ditch, ditch is apart from 60 centimetres; Keep off native segmentation in ditch and pour water the last ten-days period in April, and every section is 10-15 rice,Water layer reaches 20 centimetres, subsequently natural leaching; When after 1 day, soil moisture content is suitable, soil contains relativelyThe water yield in the time of 70%-80%, at waterline place artificial dibbling, every cave 3-4 grain, cave is apart from 20 centimetres; BroadcastAfter kind, overlay film on timely mechanical ditch, adjusts seeder clean-up scraper, overlying soil 2-3 cm thick; After emerging,In time punching cooling, grows to and puts in time seedling firming when close with mulch film until cotton seedling;

C, growing season management:

C1, reduction plant height

Carry out the omnidistance regulation and control that quantize, spray after cotton buddings for the 1st time, when cotton 7-9 blade,Control plant height is 18-20 centimetre, stem daily growth amount 0.4-0.7 centimetre, and red shank, than being 0.5-0.6, is usedMepiquat chloride 0.5-1.0g/667m², being watered 15kg and spraying, strong sprout is surely long, short early blossoming; The 2ndInferior spraying contained the flower bud phase, 10-15 blade, and plant height is 45-50 centimetre, stem daily growth amount 1.0-1.4Centimetre, red shank, than for 0.55-0.65, is used mepiquat chloride 2.0-3.0g/667m²Be watered 15kg and spray,Promote that cotton steadily and surely grows, postpone envelope ridge; Spray at initial bloom stage for the 3rd time, 16 more than blade, strainHeight is 70-80 centimetre, stem daily growth amount 1.8-2.4 centimetre, and red shank, than for 0.60-0.70, is used casing couplingAmine 4.0-5.0g/667m²Be watered 30kg and spray, prevent remaining green when it is due to become yellow and ripe late-maturing; The 4th sprays is containing flowerPhase, plant height 100-120 centimetre, stem daily growth amount 1.4-1.8 centimetre, red shank ratio is 0.70-0.80,Use 6.0-8.0g/667m²Be watered 30kg and spray, control the growth of the top and superfluous bud of side shoot, minimizingClosing;

Heavy saline cotton is used mepiquat chloride 14～16g/667m the time of infertility², make all the time cotton push up three leavesLower than top four leaves, control top not prosperous length. Average stem internode 4-5 centimetre, plant height is controlled at 95-105Centimetre.

C2, minimizing fruit branch number of units

60 centimetres of the line-spacings of control cotton plant, 20 centimetres of spacing in the rows, every mu of density is increased to 5500; ?Under conditions of high density, simplify training, early pinch, make fruit branch number of units reduce to 9-10, it is invalid to reduceFruit branch, increases the front flower of effective bell and frost;

D, results: cotton boll fully ftractures after blow-of-cottons and picks in time;

Other field management measures are with Routine Management method.

Feature of the present invention is also,

In humic acid, the content of organic butt is not less than 56%, and the content of humic acid butt is not less than38％。

N, the P of slow-release fertilizer₂O₅And K₂O content is respectively 18%, 20% and 7%.

The invention has the beneficial effects as follows:

Saline and alkaline for strand shale heavy saline is high, poor permeability, the low salt that causes of the content of organic matterPlant cotton alkali and survive the technical barrier that difficulty is large, foster and apply fertilizer to improve the soil as basis, with full stand, abridged edition, increasingProduce as object, carried out the research of the efficient upgrading cultivation technique of Muddy Bottoms heavy saline－ alkali area at seashore cotton yield,Through experimental study and production practices for many years, form " increasing that Muddy Bottoms heavy saline－ alkali area at seashore " is changed two controls "Produce synergy upgrading plant cotton technology, being intended to plant cotton for shale heavy saline provides technical support, is cotton eastThe strategy of moving provides model.

Detailed description of the invention

Below in conjunction with detailed description of the invention, the present invention is described in detail.

For strand shale heavy saline soil salt and soil texture feature, and alkaline land cotton is rawLong rule, the present invention taking " improve the soil and foster and apply fertilizer " technology for basic, by Regulation in all life process cotton plant height," two subtract " (reduce plant height and reduce fruit branch number of units) technology of controlling reasonable fruit branch number is safeguard,Reach alkaline land cotton increasing yield and improving quality.

The implantation methods that the invention provides a kind of Muddy Bottoms heavy saline－ alkali area at seashore cotton, concrete steps are:

A, improve the soil and foster and apply fertilizer: use 1,000 thousand grams/acre of ardealites (chemical fertilizer factory's purchase), humic acid mid-April(west is covered fertile industry and produced, organic butt >=56, humic acid butt >=38) double centner/mu, slowly-releasingFertile (Stanley board, N, P₂O₅、K₂O content is 18,20,7) 40,000 grams/acre, cow dung 7 side/mus,Rake is revolved in deep ploughing makes it mix with 30 centimetres of soil;

The sowing of B, the ditch that slips: corrugate device is installed on rotary plow, revolve output simultaneously wide 60 centimetres, dark 30Centimetre ditch, ditch is apart from 60 centimetres; Keep off native segmentation (10-15 rice) in ditch and pour water the last ten-days period in April, water layerReach 20 centimetres, subsequently natural leaching; After 1 day in the time that soil moisture content is suitable (relatively containing of soilThe water yield is 70%-80%), at waterline place artificial dibbling, every cave 3-4 grain, cave is apart from 20 centimetres; BroadcastAfter kind, overlay film on timely mechanical ditch, adjusts seeder clean-up scraper, overlying soil 2-3 cm thick; After emerging,Punching cooling in time, controls temperature below 40 DEG C; Grow to and put in time seedling when close with mulch film until cotton seedlingFirming;

C, growing season management:

C1, reduction plant height

Carry out the omnidistance regulation and control that quantize, spray after cotton buddings for the 1st time, when cotton 7-9 blade,Desirable plant height is 18-20 centimetre, stem daily growth amount 0.4-0.7 centimetre, and red shank, than being 0.5-0.6, is usedMepiquat chloride 0.5-1.0g/667m², being watered 15kg and spraying, strong sprout is surely long, short early blossoming; The 2nd timeContaining the flower bud phase, 10-15 blade, desirable plant height is 45-50 centimetre, stem daily growth amount 1.0-1.4 liRice, red shank, than for 0.55-0.65, is used mepiquat chloride 2.0-3.0g/667m²Be watered 15kg and spray, shortEnter cotton and steadily and surely grow, postpone envelope ridge; The 3rd time at initial bloom stage, and 16 more than blade, desirable plant height is70-80 centimetre, stem daily growth amount 1.8-2.4 centimetre, red shank, than for 0.60-0.70, is used mepiquat chloride4.0-5.0g/667m²Be watered 30kg and spray, prevent remaining green when it is due to become yellow and ripe late-maturing; The 4th is at full-bloom stage, idealPlant height 100-120 centimetre, stem daily growth amount 1.4-1.8 centimetre, red shank is than being 0.70-0.80, with contractingJoint amine 6.0-8.0g/667m²Be watered 30kg and spray, the growth of the top and superfluous bud of major control side shoot,Reduce closing.

Heavy saline cotton is used mepiquat chloride 14～16g/667m the time of infertility², concrete operations can be according to productKind, weather and growth of cereal crop seedlings growing way and determine, make all the time cotton push up three leaves lower than pushing up four leaves, control top not prosperousLong. Average stem internode 4-5 centimetre, plant height is controlled at 95-105 centimetre.

C2, minimizing fruit branch number of units

Control the line-spacing 55-65 centimetre of cotton plant, spacing in the rows 15-25 centimetre, every mu of density is 5500,Under conditions of high density, simplify training, early pinch, make fruit branch number of units reduce to 9-10, than traditionFew 1-2 the fruit branch of method, reduces invalid fruit branch, increases the front flower of effective bell and frost.

D, results: cotton boll fully ftractures after blow-of-cottons and picks in time;

Other NM field management measures are with Routine Management method.

Adopt above-mentioned implantation methods, producible beneficial effect is as follows:

(1) enforcement of the technology of the fostering and apply fertilizer impact on soil texture of improving the soil: effect is by applying certain proportionArdealite, humic acid, slow-release fertilizer, the modifying agent of cow dung composition, can change soil texture structure,Macrostructure aggregate increases; Soil fertility increases, and salinity reduces. Concrete effect is as follows:

The impact of table 1 on soil aggregation body burden

Adopt artificial point of sieve method to soil aggregate content analysis at different levels before and after processing, result shows,>the macrostructure content of 0.25mm is 9.56%,<0.25mm micro-structural content is 85.39%, soilStructural extreme difference. After improving the soil and processing, had the macrostructure of 5mm, > the macrostructure content of 0.25mmBe 25.78%, < 0.25mm micro-structural content is 51.54%, and micro-structural reduces 39.64%, macrostructureIncrease, soil texture changes obviously.

(2) impact of improving the soil and fostering and apply fertilizer on soil total salt content and pH value

By strand, the Cao Feidian district shale heavy saline cotton growing experiments of improving the soil, result shows, after improving the soilSoil total salt content declines by a big margin, and drops to 0.4% by 0.52%; P in soil H value also to some extent underFall, pH value is reduced to 7.56 by 7.97.

(3) impact of improving the soil and fostering and apply fertilizer on soil fertility: soil by inquiry Hebei province's Tangshan coast is planted cottonDistrict's soil fertility (in table 2), can find out heavy salinizedly to have that " content of organic matter is low, poorNitrogen, lack phosphorus, rich potassium " feature, comprehensively analyze soil salinization degree and field topsoil nutrient content,Propose cotton field, heavy salinized ground and carry out balance fertilizing, should grasp " heavy dressing fertilizer, increasing the p application rate, benefitNitrogen fertilizer application " fertilization principle.

Cotton region soil fertility is mainly planted in strand, table 2 Hebei

Cao Feidian district 11 farm Binhai Agricultural Research Institute of Hebei Academy of Agricultural and Forestry Sciences Modern Agricultures in 2013The industry achievements conversion base application technology of fostering and apply fertilizer of improving the soil of the present invention, uses 1,000 thousand grams/acre of ardealites, corruptionGrow sour double centner/mu, 40,000 grams/acre of slow-release fertilizers, cow dung 7 side/mus, deep ploughing revolve rake make itself and 30Centimetre soil mixes. Contrast is composite fertilizer's (N, P, K content are 15) 40 with conventional methodThousand grams/acre. Get by the end of May 0-40 cm layer of soil and measure, single meter of receiving produces after autumn, the results are shown in Table 3.

Table 3 impact of fostering and apply fertilizer on heavy saline－ alkali area at seashore soil and output of cotton of improving the soil

After strand geavy salt alkaline earth is fostered and apply fertilizer through improving the soil and processed, total salt content reduces, the full N of soil nutrient elements,Available P and organic matter are improved, and quick-acting K slightly declines. The technology of fostering and apply fertilizer of improving the soil of the present invention,Reduce the undesirable condition that has improved strand geavy salt alkaline earth " lack the rich K of the poor P of N, the content of organic matter is low ",Reduced the harm of harmful salinity, ensured the normal growth of cotton, output increases.

(4) full range control, the impact of control plant height technology on output of cotton: the control of mepiquat chloride morningization, dutyChange control, full range control, cotton plant height is controlled at 95 centimetres of left and right, and fruit branch internode shortens, and cotton field ventilatesPrinting opacity, moulds ideotype, is conducive to nutriment to the distribution of reproductive organs and knot bell, reduces flower budBell comes off, and becomes bell rate to increase. Concrete effect is as follows:

2011-2012 is carrying out " cotton mepiquat chloride time of application and the dose shadow to output of cottonRing " test. Cotton variety is the Handan 7860 of establishing in large scale, test field soil total salt content 0.5%,Density is every mu of 5500 strains.

Table 4 mepiquat chloride is used period and the impact of consumption on output of cotton

According to result of the test (in table 4) and cotton region production practice investigation, best use age and use amountIn table 5. Spray mepiquat chloride after cotton buddings the 1st time, when cotton 7-9 blade, desirable plant height is18-20 centimetre, stem daily growth amount 0.4-0.7 centimetre, red shank, than for 0.5-0.6, is used 0.5-1.0g/667m²,Be watered 15kg and spray, can promote root system development, strong sprout is surely long, can promote cotton nutrient growth toReproductive growth transforms, short early blossoming; Spray mepiquat chloride for the 2nd time and containing flower bud phase, 10-15 blade, desirable strainHeight is 45-50 centimetre, stem daily growth amount 1.0-1.4 centimetre, and red shank, than for 0.55-0.65, is used casing couplingAmine 2.0-3.0g/667m²Be watered 15kg and spray, mainly promote cotton steadily and surely to grow, be beneficial to and mould reasonThink plant type, optimize canopy structure, postpone envelope ridge, promote early to tie bell and Boll Development, strengthen root system and livePower, simplifies training in mid-term; Spray mepiquat chloride the 3rd time, 16 of initial bloom stages more than blade, desirable strainHeight is 70-80 centimetre, stem daily growth amount 1.8-2.4 centimetre, and red shank, than being 0.60-0.70, is used4.0-5.0g/667m²Be watered 30kg and spray, be conducive to increase bell weight, prevent remaining green when it is due to become yellow and ripe late-maturing, increaseEarly autumn, peach, simplified later stage training; The 4th sprays mepiquat chloride, at full-bloom stage, and desirable plant height 100-120Centimetre, stem daily growth amount 1.4-1.8 centimetre, red shank, than for 0.70-0.80, is used 6.0-8.0g/ after pinching667m²Be watered 30kg and spray, the growth of the top and superfluous bud of major control side shoot, reduces closing.

Table 5 alkaline land cotton mepiquat chloride optimization control means quantizating index

Alkaline land cotton uses mepiquat chloride 14～16g/667m the time of infertility², concrete operations can be according to productKind, weather and growth of cereal crop seedlings growing way and determine, make all the time cotton push up three leaves lower than pushing up four leaves, control top not prosperousLong. Average stem internode 4-5 centimetre, plant height is controlled at 95-105 centimetre.

(5) reduce the impact of fruit branch number on output of cotton: early pinch, make fruit branch number reduce 1-2,Reduce invalid fruit branch, avoid heavy saline cotton remaining green when it is due to become yellow and ripe late-maturing, increase effective bell, improve the front flower of frost rate,Thereby improve cotton quality and output. Select heavy saline cotton field to carry out not in Cao Feidian district of Hebei provinceWith Topping Time test and demonstration. Result of the test (in table 6) shows, the heart of in good time pinching can be abolished cottonApical dominance, reduces the apprentice consumption of invalid fruit branch to liquid manure, promotes cotton plant early to tie bell, ties bell more, minimizingCome off, before frost, flower rate increases, and has obvious the effect of increasing income.

The impact of the different Topping Time counterweight of table 6 alkaline land cotton proterties and output

Specific embodiment

Be positioned at Cao Feidian district of Hebei province, belong to the moistening continental monsoon climate in warm temperate zone half, annual rainfallAverage out to 635.7mm, rainfall is concentrated and is distributed in for 6～September, accounts for 81.7% of annual rainfall,Wherein July is the most concentrated. Rainfall space-time distributes the uneven weather spy who has determined the summer waterlogging of this area's spring droughtLevy. This district's saline-alkali soil type, taking NaCl as main, belongs to lagoonal deposition matrix, and quality is sticky heavy, and topsoil containsSalt amount more than 0.8%, belongs to strand shale heavy saline.

1, use 1,000 thousand grams/acre of ardealites (chemical fertilizer factory's purchase), humic acid (the fertile industry of west illiteracy mid-AprilProduce organic butt >=56, humic acid butt >=38) double centner/mu, slow-release fertilizer (Stanley board,N、P₂O₅、K₂O content is 18,20,7) 40,000 grams/acre, cow dung 7 side/mus, deep plough 30 centimetres.

2, slip ditch sowing: corrugate device is installed on rotary plow on request, revolve output simultaneously wide 60 centimetres,The ditch of dark 30 centimetres, ditch is apart from 60 centimetres.

3, in ditch on April 25, the native segmentation of gear (10-15 rice) is poured water, and water layer reaches 20 centimetres, subsequentlyNature leaching.

4, when after 1 day, soil moisture content is suitable, at waterline place artificial dibbling, every cave 3-4 grain, cave distance20 centimetres. After planting overlay film on timely mechanical ditch, adjusts seeder clean-up scraper, overlying soil 2-3 liRice is thick. After emerging, in time punching cooling, grows to and puts in time seedling firming when close with mulch film until cotton seedling.

5, put early thinning after seedling, final singling while growing to 3-4 sheet true leaf, every mu is stayed 5500 left and right of seedling. FewAmount is repeatedly changed control, and squaring period, Sheng flower bud phase, initial bloom stage and full-bloom stage spray respectively 0.5 gram of mepiquat chloride, 2.0Gram, 5.0 grams and 6.0, make all the time cotton push up three leaves lower than top four leaves, do not stand out. July 15 pinched.

6, other NM field management measures are with Routine Management method.

7, according to the method described above, in late April, 2013 sowing, adopts mid-early maturity kind Handan 7860,Emergence rate reaches 82%, and planting percent reaches more than 80%, and plant height is controlled at 103 centimetres, fruit branch number 10.1Individual, empty branch is few, flower rate 93.5% before frost, and cotton quality improves, 215 kilograms of average yield per mu unginned cottons. AndContrast plot emergence rate around below 40%, cotton cannot normal growth.

Claims (1)

1. an implantation methods for Muddy Bottoms heavy saline－ alkali area at seashore cotton, is characterized in that, concrete steps are:

A, improve the soil and foster and apply fertilizer: use 1,000 thousand grams/acre of ardealites, humic acid double centner/mu, 40,000 grams/acre of slow-release fertilizers and cow dung 7 side/mus mid-April, rake is revolved in deep ploughing mixes the above-mentioned fertilizer soil dark with 30 centimetres; In described humic acid, the content of organic butt is not less than 56%, and the content of humic acid butt is not less than 38%; N, the P of described slow-release fertilizer₂O₅And K₂O content is respectively 18%, 20% and 7%;

The sowing of B, the ditch that slips: corrugate device is installed on rotary plow, revolve output simultaneously wide 60 centimetres, the ditch of dark 30 centimetres, ditch is apart from 60 centimetres; Keep off native segmentation in ditch and pour water the last ten-days period in April, and every section is 10-15 rice, and water layer reaches 20 centimetres, subsequently natural leaching; When after 1 day, soil moisture content is suitable, soil relative water content in the time of 70%-80%, at waterline place artificial dibbling, every cave 3-4 grain, cave is apart from 20 centimetres; After planting mechanical film on ditch in time, adjusts seeder clean-up scraper, overlying soil 2-3 cm thick; After emerging, in time punching cooling, grows to and puts in time seedling firming when close with mulch film until cotton seedling;

C, growing season management:

C1, reduction plant height

Carry out the omnidistance regulation and control that quantize, spray after cotton buddings for the 1st time, when cotton 7-9 blade, control plant height is 18-20 centimetre, stem daily growth amount 0.4-0.7 centimetre, and red shank, than for 0.5-0.6, is used mepiquat chloride 0.5-1.0g/667m², being watered 15kg and spraying, strong sprout is surely long, short early blossoming; Spray for the 2nd time and containing the flower bud phase, 10-15 blade, plant height is 45-50 centimetre, stem daily growth amount 1.0-1.4 centimetre, red shank, than for 0.55-0.65, is used mepiquat chloride 2.0-3.0g/667m²Be watered 15kg and spray, promote that cotton steadily and surely grows, postpone envelope ridge; Spray at initial bloom stage for the 3rd time, 16 more than blade plant height is 70-80 centimetre, stem daily growth amount 1.8-2.4 centimetre, and red shank, than for 0.60-0.70, is used mepiquat chloride 4.0-5.0g/667m²Be watered 30kg and spray, prevent remaining green when it is due to become yellow and ripe late-maturing; The 4th sprays at full-bloom stage, plant height 100-120 centimetre, and stem daily growth amount 1.4-1.8 centimetre, red shank, than for 0.70-0.80, is used 6.0-8.0g/667m²Be watered 30kg and spray, control the growth of the top and superfluous bud of side shoot, minimizing closing;

Heavy saline cotton is used mepiquat chloride 14～16g/667m the time of infertility², make all the time cotton push up three leaves lower than top four leaves, control top not prosperous length, average stem internode 4-5 centimetre, plant height is controlled at 95-105 centimetre;

C2, minimizing fruit branch number of units

60 centimetres of the line-spacings of control cotton plant, 20 centimetres of spacing in the rows, every mu of density is increased to 5500; Under conditions of high density, simplify and prune, early pinch, make fruit branch number of units reduce to 9-10, reduce invalid fruit branch, increase the front flower of effective bell and frost;

D, results: cotton boll fully ftractures after blow-of-cottons and picks in time;

Other field management measures are with Routine Management method.