Studies On Group Quality Index Of Seeding Transplanting Cotton In Southern Xinjiang

This research was done during the year 2010 in Agricultural Research Station of Plant Science College of Xinjiang Tarim University. The tested cotton varieties were hybrid of South Xinjiang named Zhaofeng Hybrid No.1. The research was studied on group quality index of seeding transplanting cotton .The research results are as follows:1.All group characters that of plant height, stem diameter, fruit section quantity,Cotton floweringquantity, bolls per plant show the S-type trends of previous growth slow, medium-term fast and later slow. The leaf area is growing faster in earlier stage, reaching the maximum in July 11 before or after. Bare rooting transplanting cottons had more differences between treatment than plug seeding transplanting cottons.The period all various characters appear bigger difference appeared after June 10 , also after June 10 was the key period to control the group traits of transplanting cottons to reasonable values.2. The yield of different transplanting types of transplanting cottons were mainly influenced by leafyshoot quantity, leafyshoot boll number, fruitbranch boll number, flowering boll weight. Leafyshoot boll number and leafyshoot boll weight had promote effect. It Should be Stable branch yield while improving the leafyshoot bell rate in order to improve cotton yield.3.Transplanting cottons bell space distribution in transverse all mainly concentrates around the first and second quarter bits, the third quarter distribution with the increase of corresponding decreased density. Transplanting cottons bell space distribution in longitudinal all mainly concentrated in the central internode , plug seeding transplanting cotton's bell distribution was more concentrated than that of bare rooting transplanting cottons. Two types of transplanting cotton were performing that the upper internode into the bell tendency of low rate.;4. Bare rooting and plug seeding transplanting cottons'Characters of plant height, fruit section quantity were related with yield in Linear relationship while transplanting density were 45 thousand plants per hectare. It showed that as for transplanting cotton transplanting density in 45 thousand plants per hectare was to low, it Should be Stable branch yield while improving the leafyshoot bell rate in order to improve cotton yield. It Should be Given full playing to Individual yield potential in order to improve cotton yield.5. Group characters of plant height, fruit section quantity and bolls per plant were related with yield in quadratic function while transplanting density were 90 thousand plants per hectare and 135 thousand plants per hectare. Suitable group height should be controlled in 65.5cm while transplanting density was 90 thousand plants per hectare and be in 62.8cm while 135 thousand plants per hectare that by bare rooting transplanting cottons;Also Suitable group height should be controlled in 70cm while density was 90 thousand plants per hectare and be in 65cm while 135 thousand plants per hectare that of plug seeding transplanting cottons. Suitable group fruit section should be controlled in 3.065 millions per hectare while density was 90 thousand plants per hectare and be in 3.58 millions per hectare while density was 135 thousand plants per hectare that by bare rooting transplanting cottons; Suitable group fruit section should be in 3.44 millions per hectare while density was 90 thousand plants per hectare and be in 4.544 millions per hectare while density was 135 thousand plants per hectare that by plug seeding transplanting cottons. Suitable group bolls per plant should be controlled in 3.26 while density was 45 thousand plants per hectare and be in 2.67 while density was 90 thousand plants per hectare and be in 2.51 while transplanting density was 135 thousand plants per hectare that by bare rooting transplanting cottons; Suitable group bolls per plant should be in 3.35 while density was 45 thousand plants per hectare and be in 3.1 while density was 90 housand plants per hectare and be in 2.97 while density was 135 thousand plants per hectare that by plug seeding transplanting cottons.