| Conventional cotton production technology has reached the limit in Xinjiang. Hybrid advantage is apparent in hybrid cotton, cotton yield, quality and economic benefit of planting areas are outstanding, but it grows exuberant,and has longer growth period, the effective temperature in NorthXinjiang can not fully meet their growth, what is more, hybrid cotton seed production process is complex, the price is higher than conventional kind which resulting in production costs and seriously restricts the popularization and application of hybrid cotton at presently in the actual production. In order to solve the above problems.Throuch field test, contrasting with conventional cotton,the investigation and analysis of different hybrid cotton varieties seedling transplanter planting process, agronomic characteristics, yield formation characteristics, the cost-effectiveness etc. differences were studied in the North Xinjiang.Suitable transplanting sparse conditions of hybrid cotton high yield cultivation technology were put forward ,which provided theory and practice basis for construction of hybrid cotton seedling transplanting, high and stable yield cultivation. Conclusions were as follows:Compared with direct seeding, hybrid cotton seedling transplanting sparse planting, growth period is earlier 10-15 days than direct seeding.At the same time, nutrition branch knot of hybrid cotton had a higher proportion after seedling transplanting sparse planting . The proportion of Before peach, Fu Tao significantly increased when transplanting density up to 1500 / mu.Before frost rate was higher than conventional planting cotton field.Avoided growth stage, late adverse environmental conditions effect of hybrid cotton on cotton, ensured the high and stable yield of hybrid cotton.The choice of hybrid cotton seedling transplanting sparce varieties should have uniramous boll setting ability boll number, blossom open-boll period short, wadding, before frost ratio higher characteristic. Based on the common four hybrid cotton variety seven miscellaneous nine, Lu Mian yan 24, Tian za10, ZhongZa10 different density of transplanting test research,the capacity of Lu Mian yan 24 branches is the strongest, 61.87%, fruit number is the most, total boll number of per branch is the highest of all the test varieties.It can mostly display the per plant bell advantage. And Lu Mian yan 24 blossom wadding, lint yield before frost accounted to 89% of total output.The grade and the staple are the highest of 5 varieties,and it is the most suitable transplanting seedlings variety of 5 Hybrid Cotton Varieties.The study of hybrid cotton seedling transplanting density found that when transplanting density were 666 strains/ mu, 1000 strains / mu, 1500 strains/ mu 2000 strains/ mu, cotton yield reached up to more than 400 kilograms /mu.The cotton yield raise over 50 kilograms compared with conventional, The yield were all increased. But to different density treatment production cost analysis found that, along with the transplanting density increase the cost of production was also increasing.The cultivate benefit were analyzed and compared,total benefit is the highest when transplanting density is 1500 strains/mu, benefit/mu increased to nearly 180 yuan,which is optimum planting density in the hybrid cotton seedling transplanting mode.The cotton hybrid seedling transplanting in Manasi county should choose the appropriate variety, the breeding time is between February 25th - March 5th, transplanting time was between May 1st - May 8th, the leaf age is 4 leaves 1 heart when transplanting, the best density is in the 15000-22500 strain /hectare, the field management should be strengthed, integrated pest control should be well done, total boll number/hm2 should be greater than 120 x 104 when receiving florescence, single boll should greater than 5.5 grams, lint percentage should be higher than 43%, before frost rate should achieve above to 90%, all these measures above can guarantee the hybrid cotton seedling planting sparse yield and economic benefit. |
PDF Full Text Request