Genesis Of Cotton Seedling Of Southern Xinjinag And Its Effect On Cotton Yield And Quality

Xinjiang has been the most suitable area for planting cotton and the largest planting area.In response to the policy of "reducing cotton,stabilizing grain,increasing livestock and expanding" and the impact of international cotton market prices,the planting area of single cotton in Xinjiang has been continuously reduced in recent years.In the situation of reducing the planting area of cotton,in order to ensure the balance of cotton production and marketing and farmer benefits,all kinds of intercropping patterns of fruit cotton came into being and derived into characteristic mode.However,cotton production is still dominated by field trials.In view of these backgrounds,it is imperative to explore the factors that affect the production and quality of field production,improve and enhance the cultivation and management measures.The experiment was conducted in the first division of Xinjiang from 2014 to 2015.Selected the Xinluzhong 37 and the Zhongmian 49 as test materials,Using the combination of field trials and field surveys,the reasons for the emergence of cotton seedlings and the size of seedlings on the cotton yield and quality of the impact,it is of great significance to cultivate cotton cultivation technology scientifically.The main test results were as follows:1?Seed size experiments showed that: The seed size had little effect on the agronomic traits of cotton big seedlings and small seedlings,while the agronomic traits of big and small seedlings were different.Big seedling height,leaf age,fruit number,bud number,flowering number,the number of bell was relatively higher than small seedlings,and the growth of small seedlings was slower than that of big seedlings.There was no significant difference in the yield of big seedling,and the yield of small seedling was significant.On the whole,the total yield of cotton was not significant,the highest yield was 6194.70 kg / hm2 by the large seed,which was 7.89% higher than CK.Little effected on quality.The overall quality to the best seed was medium seed.2?The sowing test showed that:Sowing depth was one of the causes of cotton seedling.Sowing depth affected the yield of cotton by affecting the number of harvested plants.The sowing depth had little effect on the agronomic traits of big seedlings and small seedlings,and the agronomic traits of big and small seedlings were different.When the sowing depth was 2cm,the yield of the whole plot was 7232.40 kg / hm2,and the fiber quality was better.When the sowing depth was more than 2cm,the yield of cotton decreased with the deepening of planting depth.When the sowing depth was 4cm,the number of large seedlings was 26655 plants / hm2,the number of seedlings was 0 / hm2,the yield of large seedlings was 1800.45 kg / hm2,the yield of seedlings was the lowest,and the difference was significant.In terms of quality,the cotton in the upper half was long,micronaire,maturity,uniformity and reflectivity were significantly different.There was a significant difference in the length and maturity of the cotton in the upper half.Uniformity of the existence of differences,the remaining quality characteristics of the difference was not significant,sowing depth of 2cm when the best cotton quality.3?Trowning measures showed that:The number of cotton groups in different growth stages was significant.On the treatment of DB4,the number of cotton populations and big seedlings was the highest,which was 216538.60 plants / hm2,206 815.90 plants /hm2,and in each growth period the dynamic change was consistent with the change trend of big seedlings;The yield of cotton was the highest by DB1?DB4,which was 9139.67 kg.hm-2,8382.20 kg.hm-2,and the difference between the two treatments was not significant,and on the treatment of DB4 the lowest yield was 4 777.28 kg.hm-2,big seedlings,small seedlings,mixed-like fiber quality were treated for the best by DB4.Therefore,the comprehensive indicators,the treatment of DB4: winter irrigation + spring irrigation + spring turn in the region of cotton production and quality,continuous cropping cotton was not recommended to deal with DB5: winter turn + spring trowning measures.4?Chemical tests showed that:Different periods,different doses of the chemical regulation of shrinkable amines were not the cause of large cotton seedlings.The number of cotton seedling plants began to decrease from the seedling stage to the bud stage,and the number of seedlings was increased from the flowering period to the bell stage,but the number of seedlings was lower than that of the seedlings at seedling stage.Under different treatments,the yield and quality traits of big seedlings and small seedlings were not significant.The highest yield by CK was 5 268.70 kg /hm2 and the H4 yield was 5 231.76kg/hm2.Synthesis of the various processing between the production,quality data,to adjust the test to H4 as well.