CN101147447A - Middle saline-alkali soil cotton cultivating method - Google Patents

Abstract

The present invention relates to a method for cultivating cotton in medium saline and alkaline land, belonging to the field of plant cultivation technology, mainly for solving the problem of planting cotton in saline and alkaline land. Said method is characterized by that it includes the following steps: adopting short-seasonal cotton species whose growth stage is about 115 days, in the midde ten days of fifth month, after the surface temperature is risen again, sowing; adopting sowing in deep furrow, mulching, after emergence of seedlings postponing the time of transplanting seedlings; planting desity is about 6000 plants/mu, non-training, only pruning tip, adopting mepiquat chloride (DPC) to make chemical control of its whole growth process, finally controlling plant height and making it be about 80cm.

Description

A kind of moderate alkaline land cotton cultivation

Technical field

The present invention relates to a kind of plant cultivation method, is the method at moderate saline land plant cotton specifically.Be particularly suitable for the moderate saline land of salt content 0.4 ~ 0.8%.

Background technology

There are a large amount of saline lands China cotton growing area, utilizes the strong characteristics development saline land of cotton salt resistance to plant cotton, is to solve the effective way that grain and cotton is striven ground contradiction, stablized the Cotton Production scale.It generally is under the assurance of measures such as big hydraulic pressure salt and plastic mulching that cotton is planted in the saline land, adopt mid-early maturity kind, sowing date for early sowing kind, intermediate density, but the general only suitable salt content of this conventional art is in the cotton field below 0.3%, and be subjected to low temperature, saline and alkaline influence, the phenomenons such as disconnected ridge, cotton be late-maturing that still occur often being short of seedling cause that investment is big, recruitment is many, benefit is low.

For satisfying the needs of saline land plant cotton, domestic how tame unit had once carried out a series of researchs from different angles, be mainly reflected in 3 aspects: the one, cultivate the salt tolerant kind, although at present can be by the new varieties of transgenosis or molecular biological some shapes that have specific characteristics of technology directive breeding, but do not see the anti-salt cotton variety of the transgenosis that can directly utilize aborning yet at present, the seed selection of anti-salt cotton variety is shouldered heavy responsibilities; The 2nd, the research and development anti-salt agent, Shandong Normal University discloses a kind of anti-salt agent in " plant anti-salt agent improves the foundation and the effect (Wang Baoshan, Zhang Baoze; " Shandong agricultural science ", 1995, NO.6; 31 ~ 33) of saline land crop yield " literary composition, just this product is from releasing the existing time more than 10 years till now, but the utilization of scale is not arranged aborning, and the effect that is enhancing salt-resistance under the field condition of tracing it to its cause is more limited, and need seed soaking, use inconvenience; The 3rd, adopt agronomic technique, numerous domestic cotton scientific worker and plant the cotton grower people and invented trench digging in succession and stamp the cotton culture method at the saline land such as salt and old ditch plantation, Zhang Cunxin is " alkaline land cotton is sowed the technology of keeping a full stand of seedings " (" Jiangxi cotton ", 1997, No.1,19 ~ 20) in the literary composition this has been done detailed introduction.Liu Shengtian and Han Changsheng are at " the two films of alkaline land cotton cover high-yield high-grade culture technique research " (" cotton journal ", 1997, No.5,261 ~ 266) disclose a kind of method of utilizing the little shed of plastic film to add plastic mulching is cultivated cotton in the saline land two film mulching and planting methods, effect of increasing production has preferably been arranged.But along with rural laborer's transfer, recruitment cost height, the application scale and the effect of increasing production of these conventional arts show more and more limitedly.

In a word, utilize existing cultivation method, only be adapted at salt content and be lower than 0.3% saline land and plant cotton, be higher than 0.3% saline land, then must look for another way for salt content.

Summary of the invention

The object of the present invention is to provide and a kind ofly can plant cotton method in moderate salt content saline land, emphasis solves cotton Cheng Miaoli seedling difficulty in the traditional cultivation method of saline land, be short of seedling that disconnected ridge is serious, cotton is late problem such as sends out late-maturing.

The objective of the invention is to be achieved through the following technical solutions:

Late spring broadcasts, high density: sowing during 15 days ~ May 20 May sowing time, and density 5000 ~ 6000 strain/mus adopt drilling without exception, advocate employing lint capsuled seed; Saliferous 0.5% and above cotton field must fresh water pressure salt, pressure salt arrangement 26～35 days prior to seeding, 70 ~ 100 cubes/mu of water consumptions;

Open the zanjon sowing, postpone and put seedling: utilize machinery or the artificial seed furrow of leaving dark 12cm, bottom width 5cm, opening 15cm earlier, seed is sowed at about bottom of trench earthing 2.5cm, use mulch film flat cover seed furrow then,, form one and fall trapezoidal little empty canopy in tension of the both sides of seed furrow and compacting; After seed sprouting emerges, postpone and to put seedling, cotton seedling can be grown under the ditch inner membrance 10 ~ 15 days, according to growing way and weather cotton seedling was emitted outside the film after waiting to grow true leaf; Before putting seedling, running check, in case mulch film will be touched in cotton seedling top, will in time put seedling, in case the hyperthermal injury seedling;

Topdress suitable morning, omnidistance chemical control: better-than-average soil fertility cotton field, all nitrogenous fertilizer once apply in containing the flower bud phase, medium or on the lower side soil fertility once apply in initial bloom stage; General every mu imposes 10 ~ 15 kilograms in urea; Base fertilizer is not executed an amount of phosphorus potash fertilizer of will imposing of phosphorus potash fertilizer; Containing flower bud phase every mu of dilution with 10 ~ 15 kilograms in water, casing coupling peace 0.5 ~ 1.0 gram sprays; Every mu of dilution with 15 ~ 25 kilograms in water, casing coupling peace 1 ~ 1.5 gram of initial bloom stage sprays; Every mu of dilution with 30 ~ 40 kilograms in water, casing coupling peace 1.5 ~ 2.5 grams of full-bloom stage sprays; Dry year is taken the circumstances into consideration to reduce casing coupling peace consumption 45～55% or is reduced the chemical control number of times 1 ~ 2 time, and the rainy time will increase casing coupling peace consumption 45～55% as one sees fit or increase the chemical control number of times 2 ~ 3 times; The chemical control number of times that increases or reduce can be at any florescence, but final plant height is controlled at 75 ~ 85cm;

Exempt from training, early pinch: by high density and omnidistance chemical control, the vegetative shoot on the cotton plant is very few, therefore need not prune, but according to later stage weather conditions and cotton development morning and evening, beat the top heart before July 20; For preventing early ageing, after buddingging, all cotton field Ying Yu of buddingging in the past June 10 extractd bottom flower bud 2 ~ 4 morning in 8～12 days, perhaps directly destroy 2 fruit branches in bottom.

Other NM field management measure is carried out according to a conventional method as watering, intertill, control worm etc.

The most suitable employing short season cotton of method of the present invention kind, its time of infertility is below 115 days.

The invention has the beneficial effects as follows: one aspect of the present invention by the interplanting short season cotton by improving density and early pinching cotton prematurity such as promotion such as the measure of grade, sow, open zanjon sowing and postponement on the other hand puts seedling time, omnidistance chemical control and exempts from training etc. by postponing, problem such as both efficiently solved Cheng Miaoli seedling difficulty in the traditional planting technology, the disconnected ridge that is short of seedling is serious and cotton is late-maturing, also control measures such as handling, exempt from training and saved production cost, thereby realized stable high yield, abridged edition target efficiently by casing coupling Anhua.For providing a kind of plant cotton, the moderate saline land realizes the method for high yield, stable yields, abridged edition, synergy.

This technology is adapted at the moderate saline land of salt content 0.4% ~ 0.8% and uses, and according to the multiple years test, adopts this technology as be lower than 0.3% saline land in salt content, compares with conventional art, does not in most cases have effect of increasing production; Be higher than 0.8% saline land in salt content and adopt this technology, output of cotton is low excessively, and benefit is also undesirable, replants cotton after should improveing.Can increase production 15 ~ 30% than being easier to realize 200 ~ 250kg/ mu at the saline land of saliferous 0.4% ~ 0.8% seed cotton yield, output and benefit improve significantly.

For good effect of the present invention and relative theory are described, below according to our series of studies and measurement result for many years, and the comparing result of the present invention and traditional planting technology is further set forth this invention.

The short season cotton kind has the characteristic of late sowing precocity: be because the short season cotton flower bud differentiation begins more Zao than the spring cotton variety on the one hand.We utilize anatomical research to find, short season cotton kind Shandong cotton is ground No. 19 (be called for short Shandong 19) and middle cotton institute No. 16, and (in the abbreviation 16) begun the differentiation of bud original hase when the 2nd true leaf launches, and in No. 12, ripe cotton variety middle cotton institute (in the abbreviation 12) and Shandong cotton No. 14 (abbreviation Shandongs 14) when the 4th true leaf expansion, just begin flower bud differentiation.Further utilize the indirect ELISA technical research to find, short season cotton Shandong cotton is ground No. 19, No. 16, middle cotton institute, cotton No. 14 4 kinds of No. 12, middle cotton institute and Shandong when the beginning flower bud differentiation, IAA content ebb and peroxidase activity peak all appear in the stem terminal bud, illustrate that the cotton flower bud differentiation is relevant with the reduction of IAA content, and the reduction of IAA content may be by (table 1, table 2) due to the peroxidase activity rising.Be because photosynthetic product stresses to distribute the reproductive growth that has promoted short season cotton to reproductive organs on the other hand.Utilize ¹⁴The C isotope tracer technique is found, seedling stage ¹⁴Difference has appearred in C assimilation substance be distributed between two groups of experimental cultivars, and early-maturing variety transports the many of terminal bud to, transports lacking in the root to, and medium variety is then opposite. ¹⁴The C photosynthetic product transports ratio, a little higher than medium variety of short season cotton kind.Sheng flower bud phase short season cotton kind transports square to ¹⁴The C assimilation products is apparently higher than medium variety (table 3).Short season cotton ¹⁴C photosynthetic product more fortune in seedling stage is mainly transported the characteristics to square to terminal bud, Sheng flower bud phase, has promoted growing of these positions and organ, thereby precocious.

Saline and alkaline adverse effect can be effectively alleviated in the ground temperature back sowing of ging up: emerge difficulty, the difficulty of keeping a full stand of seedings, the disconnected ridge that is short of seedling, the ripe main cause of late retardation in hair-growing of alkaline land cotton is the interaction of low temperature and salt damage.Evidence, the sowing short season cotton can effectively solve this difficult problem after ground temperature went up.We were No. 30, about 0.35% saline land interval sowing short season cotton middle cotton institute at Dongying City Dongying District 0～10cm soil salt content in 1999, find under the open field live broadcast condition, and sowing on April 15, emergence rate has only 20%, planting percent then lower (12%); Sowed after May 15, ground temperature went up and postpone till, emergence rate reaches more than 73%, and planting percent reaches 70%, can realize that basically one broadcasts full stand.Because postpone the variation that sowing does not change salt content and soil moisture substantially, the raising of emergence rate should mainly have benefited from the raising of temperature, May 15, soil temperature reached 19.3 ℃, than improving 5.4 ℃ (table 4) on April 15.This shows, beach saline land adopt short season cotton late sowing kind for emerge, the effect of Cheng Miao is very significant.

The variation of IAA content (ng/g Fw) during table 1, the flower bud differentiation of different ripe property cotton variety

Kind	Kind	The stem exhibition number of sheets (sheet/strain)
									0	1	2	3	4	5	6
		Short season cotton	Shandong 19	410	520	370	360	460								570	690
In 16	390								490	300	350	480	560	708
			Spring cotton	In 12	481	505	621	435							420	580	685
Shandong 14	521	555							654	450	512	592	705

The variation of peroxidase activity (OD/min.g) during table 2, the flower bud differentiation of different ripe property cotton variety

Type	Kind	The stem exhibition number of sheets (sheet/strain)
									0	1	2	3	4	5	6
		Short season cotton	Shandong 19	20.5	13.2	18.7	8.2	7.6								6.8	7.5
In 16	19.0								11.9	17.7	10.5	8.5	7.6	7.7
			Spring cotton	In 12	12.3	8.2	9.1	14.9							15.6	9.1	8.9
Shandong 14	13.1	8.2							9.0	22.6	19.5	11.8	10.9

The different ripe property cotton varieties of table 3 ¹⁴The C assimilation products is to the allocation proportion (%) of each organ

Breeding time	Kind	Root	Stem	Leaf and branch	Flower bud	Terminal bud
							Seedling stage	In 16	8.18	10.98	68.4	-	12.44
Shandong 19	7.98	11.12	69.05	-	11.85
						In 12		11.19	9.05	72.71	-	7.05
Shandong 14	12.20	10.08	70.60	-	7.12
						Contain the flower bud phase		In 16	8.28	10.65	60.57	11.65	8.85
Shandong 19	9.26	10.04	59.90	10.95	9.85
							In 12	11.58	9.52	62.59	7.26	9.05
Shandong 14	11.35	8.02	63.05	8.68	8.90
							Full-bloom stage	In 16	6.58	6.83	70.78	11.58	4.23
Shandong 19	6.62	6.94	71.50	10.98	3.96
						In 12		6.83	7.05	68.42	12.02	5.68
Shandong 14	6.55	7.05	67.83	11.60	6.97

Table 4 sowing time emerges and the influence that becomes seedling to the saline land short season cotton with seeding method

Sowing time (day/moon)	Seeding method	Salt content (%)	Soil moisture content (%)	Soil temperature (℃)	Emergence rate (%)	Planting percent (%)
							15/4	Open field live broadcast	0.317	12.96	13.9	20.4	12.2
Plastic mulching	0.246	14.44	14.8	49.7	39.8
						The zanjon sowing		0.206	14.32	14.9	67.2	50.6
30/4	Open field live broadcast	0.321	12.36	16.8	43.5								40.6
						Plastic mulching	0.244	13.39	18.9	75.8	70.2
	The zanjon sowing	0.212	12.9	18.4	80.5							78.6
						15/5	Open field live broadcast	0.309	12.45	19.3	73.5		69.9
Plastic mulching	0.249	14.25	21.6	79.9	72.4
							The zanjon sowing	0.198	13.89	22.0	89.7	87.6

Annotate: the soil sample degree of depth is 0 ~ 10cm, and the result of plastic mulching is the measured value of soil under the film, and the result of zanjon sowing is the measured value of film hyposulculus subsoil earth.

It is obvious that zanjon sowing, delayed release seedling and short season cotton late spring are broadcast the effect that technology organically combines: sow at plastic mulching or zanjon and cover under the condition of mulch film, no matter when sow, plastic mulching or zanjon sowing lid ground all show significantly the effect that heats, preserves soil moisture and press down salt, compare with open field live broadcast, the sowing of plastic mulching and zanjon cover mulch film and all can be significantly improved and emerge and planting percent, and it is the most obvious to sow the effect of covering mulch film with zanjon especially.But, sowing on April 15, cover mulch film even adopt the sowing of plastic mulching or zanjon, emerge and planting percent also have only 30% ~ 40% and 50% ~ 60% respectively, sow and postpone till May 15, then the emergence rate of plastic mulching reaches 80%, and planting percent reaches more than 72%, and the emergence rate of mulch film and planting percent are covered in zanjon sowing can higher (table 4).As can be seen, cover mulch film by postponing the sowing of sowing and zanjon, can improve greatly emerge, planting percent, be the effective technical way that realization alkaline land cotton one is broadcast full stand.

The configuration of date of seeding and density: at Dongying District short season cotton Shandong cotton was ground No. 19 date of seeding and density and test in 2003.Experimental field 0 ~ 10cm soil salt content 0.32%, all adopts plastic mulching, using sufficient under the prerequisite of fertilizer heavy dressing flower bell fertilizer.The result shows, sowing on May 1, though the flower rate reaches 100% before the frost of cotton, big Tanaka obviously as can be seen cotton early ageing appears, so the total bell number of cotton plant is few, output is about 70kg/ mu, this output will be well below the spring cotton variety of sowing mid-April; May 15, sowing was the highest with the output of density 5000 strain/mus, reached more than the 85kg/ mu, and the flower rate also reaches 90% before the frost; May 30 sowing is although the output when density 6,000 ten thousand strains/mu also can reach more than the 70kg/ mu colored rate lower (table 5) before the frost.

According to result of the test, be combined in the situation of beach saline land demonstration plant short season cotton, date of seeding, should be 15 to 20 May.During this period of time, because ground temperature relatively helps cotton and emerge, so temperature no longer is the main limiting factor of emerging, and the determining of cotton date of seeding should mainly be considered the cotton field soil moisture content, should select the time sowing of soil moisture content the best, broadcasts full stand to realize one.The density of short season cotton should be got up with the reasonable disposition in sowing time.Basic principle is sowing on May 5 ~ 10, density 4000 ~ 5000 strain/mus; Sowing on May 10 ~ 20, density are about 5000 strain/mus, and May 20 is sowing later on, and density should be increased to about 6000 strain/mus.

The output of short season cotton under table 5 different sowing dates and the density configuration condition

Sowing time (day/moon)	Plan density (strain/mu)	The real density (strain/mu) of receiving	Flower rate (%) before the frost	Total bell number (ten thousand/mu)	Average bell heavy (g)	Ginning outturn (%)	Lint yield (kg/ mu)
								1/5	4000	3907	100	4.89	4.21	36.3	74.6
5000	4887	100	4.70	4.18	36.9	72.4
							6000		5753	100	5.16	4.14	35.4	75.6
15/5	4000	3980	80.2	4.78	4.10	35.9									70.2
							5000	4913	90.4	6.25	4.08	35.9	85.6
	6000	5673	91.5	6.01	4.05	35.5								79.9
							30/5	4000	3987	62.4	4.98	4.02	36.2		55.2
5000	4913	68.9	5.07	4.00	36.9	68.6
								6000	5873	73.5	5.57	3.94	36.9	70.9

The pure planting effect that presents a demonstration of short season cotton.2004 ~ 2005 years in Changyi City, Dongying District and Huimin County be contrast with 33B, the benefit of short season cotton planting technology is studied.0 ~ 10cm soil salt content is 0.45% ~ 0.49%, every some demonstration quarter area 100m ², triplicate.The short season cotton kind is ground No. 19 for the Shandong cotton.Triadic mean output and benefit situation are listed in table 6.

The benefit situation of table 6 saline land plantation short season cotton

Sowing time (day/moon)	Kind	Lint yield (kg/ mu)	The output value of gined cotton+cotton seed (unit/mu)	Materialization drops into (unit/mu)	Artificial drop into (unit/mu)	Net income (unit/mu)
							15/4	33B	89.73	804.00	219.00	280.00	305.00
Shandong 19	70.33	633.00	219.00	280.00	134.00
						30/4		33B	74.20	665.00	210.00	260.00	195.00
Shandong 19	75.40	679.00	210.00	260.00	209.00
							20/5	33B	56.80	509.00	199.00	250.00	60.00
Shandong 19	86.33	777.00	199.00	250.00	328.00

Annotate: gined cotton is by 8 yuan/kg, and cotton seed is by 0.8 yuan/kg, manually by 8 yuan/.

Find out that from the listed demonstration effect of table 6 the highest with the output of the cotton 33B of spring of April 15 sowing, short season cotton Shandong cotton is ground No. 19 spring sowing output well below 33B, benefit is also not as plantation 33B.But, sowing on May 15 33B, output is minimum, benefit is also the poorest, grinds No. 19 and at this moment plant short season cotton Shandong cotton, though output is more lower slightly than the 33B of sowing on April 15, but because short season cotton is short breeding time, corresponding materialization input and artificial the input are reduced, thereby most effective.

There is more than 1,000 ten thousand mu in cotton field, saline land in the landlocked cotton region of China, and wherein only just there is cotton field, nearly 4,000,000 mu of saline lands in Shandong, and lying waste, it is bigger to plant cotton saline-alkali wasteland area.In these saline lands, nearly more than 800 ten thousand mu are fit to adopt this technology.As long as technology uses properly, can be at the saline land of saliferous 0.4% ~ 0.8% seed cotton yield than being easier to realize 200 ~ 250kg/ mu, than utilization conventional art plantation spring cotton variety volume increase 15 ~ 30%, and investment is without any increase, output and benefit improve significantly, have broad prospect for its application.

Description of drawings:

Figure is out the design sketch behind the zanjon insemination and emergence.

Embodiment:

Grinding No. 19 with the Shandong cotton below is that example describes of the present invention kind of method for planting in detail:

1, kind and soil: the Shandong cotton is ground No. 19 and is the short season cotton kind, adopts the lint capsuled seed.Soil salt content 0.65% carried out big hydraulic pressure salt before April 20,80 cubes of water consumptions of mu reducing the seeding layer soil salt content, and are made moisture in the soil for sowing cotton seed; Meticulous whole ground (plough, harrow) prepares sowing before and after May 15, and mu is executed 2 cubes of farmyard manures, 30 kilograms of superphosphate, 20 kilograms in urea during whole ground.

2, sow and put seedling: sowed line-spacing 90cm May 20; Utilize machinery or the artificial seed furrow of leaving dark 12cm, bottom width 5cm, opening 15cm earlier before the sowing, again seed is sowed at about bottom of trench earthing 2.5cm, use mulch film flat cover seed furrow then,, form one and fall trapezoidal little empty canopy in tension of the both sides of seed furrow and compacting; After seed sprouting emerges, postpone and putting the seedling time, cotton seedling grows true leaf in growth under the ditch inner membrance after 12 days, cotton seedling is emitted outside the film, and seedling setting hole is tight with soil pressure, in order to avoid strong wind is taken off weed growth under film or the film.The cotton density of reserved seedlings is 6000 strain/mus, line-spacing 80cm, spacing in the rows 14cm.

3, topdress and chemical control: impose 15 kilograms in urea in initial bloom stage mu.From buddingging, casing coupling peace of spray in per about 10 days, heavy according to preceding light back, see that the sky sees that the principle of seedling adjustment carries out chemical control.Contain flower bud phase, initial bloom stage and full-bloom stage and spray casing coupling peace 0.5 ~ 1.0 gram (water is sprayed for 10 ~ 15 kilograms), 1 ~ 1.5 gram (water is sprayed for 15 ~ 25 kilograms) and 1.5 ~ 2.5 grams (water is sprayed for 30 ~ 40 kilograms) for every mu; Final plant height is controlled at 75 ~ 85cm;

4, prune and pinch: by high density and omnidistance chemical control, the vegetative shoot on the cotton plant is very few, without artificial removal's vegetative shoot (training), but should in July 20 to the cotton heart of pinching, beat the top leaf of cotton when pinching wholeheartedly; Note cotton as buddingging in the past June 10, Ying Yu is buddingged and was extractd bottom flower bud 2 ~ 4 morning in back about 10 days, perhaps directly destroys 2 fruit branches in bottom.

5, other NM field management measure is carried out according to a conventional method as watering, intertill, earth up, control worm etc.

Claims (2)

1. moderate alkaline land cotton cultivation is characterized in that step comprises:

Late spring broadcasts, high density: sowing during 15 days ~ May 20 May sowing time, and density 5000 ~ 6000 strain/mus adopt drilling without exception, advocate employing lint capsuled seed; Saliferous 0.5% and above cotton field must fresh water pressure salt, pressure salt arrangement 26～35 days prior to seeding, 70 ~ 100 cubes/mu of water consumptions;

Open the zanjon sowing, postpone and put seedling: utilize machinery or the artificial seed furrow of leaving dark 12cm, bottom width 5cm, opening 15cm earlier, seed is sowed at about bottom of trench earthing 2.5cm, use mulch film flat cover seed furrow then,, form one and fall trapezoidal little empty canopy in tension of the both sides of seed furrow and compacting; After seed sprouting emerges, postpone and put seedling, cotton seedling can be grown under the ditch inner membrance 10 ~ 15 days, according to growing way and weather cotton seedling is emitted outside the film after waiting to grow true leaf: before putting seedling, running check, in case mulch film will be touched in cotton seedling top, will in time put seedling, in case the hyperthermal injury seedling;

Topdress suitable morning, omnidistance chemical control: better-than-average soil fertility cotton field, all nitrogenous fertilizer once apply in containing the flower bud phase, medium or on the lower side soil fertility once apply in initial bloom stage; General every mu imposes 10 ~ 15 kilograms in urea; Base fertilizer is not executed an amount of phosphorus potash fertilizer of will imposing of phosphorus potash fertilizer; Containing flower bud phase every mu of dilution with 10 ~ 15 kilograms in water, casing coupling peace 0.5 ~ 1.0 gram sprays; Every mu of dilution with 15 ~ 25 kilograms in water, casing coupling peace 1 ~ 1.5 gram of initial bloom stage sprays; Every mu of dilution with 30 ~ 40 kilograms in water, casing coupling peace 1.5 ~ 2.5 grams of full-bloom stage sprays: dry year is taken the circumstances into consideration to reduce casing coupling peace consumption 45～55% or is reduced the chemical control number of times 1 ~ 2 time, and the rainy time will increase casing coupling peace consumption 45～55% as one sees fit or increase the chemical control number of times 2 ~ 3 times; The chemical control number of times that increases or reduce can be at any florescence, but final plant height is controlled at 75 ~ 85cm;

Exempt from training, early pinch: by high density and omnidistance chemical control, the vegetative shoot on the cotton plant is very few, therefore need not prune, but according to later stage weather conditions and cotton development morning and evening, beat the top heart before July 20; For preventing early ageing, after buddingging, all cotton field Ying Yu of buddingging in the past June 10 extractd bottom flower bud 2 ~ 4 morning in 8～12 days, perhaps directly destroy 2 fruit branches in bottom.

2. moderate alkaline land cotton cultivation as claimed in claim 1 is characterized in that, adopts the short season cotton kind, and its time of infertility is below 115 days.

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