Study On The Productivity And Its Potential Productivity Of Cotton In Xinjiang

Photosynthetic productivity, light temperature productivity, dry matter productivity and the sun light utilization rate of cotton in Xinjiang were worked out in order of Special-early Maturity Sub-region, Early Maturity Sub-region, Early-mid Maturity Sub-region and Mid Maturity Sub-region, mainly by application of methods of Agro-ecological Zone, photosynthetic productivity and light utilization rate. The results of the study showed as follows: (1) In Xinjiang, cotton average photosynthetic productivity of lint and cotton average photosynthetic biomass productivity were 19902.185kg·hm-2 and 46.391g·m-2·d-1 respectively. As far as the whole region is concerned, the limited photosynthetic productivity of lint was 21581.507kg·hm-2 (in Hongxingerchang) and the most photosynthetic biomass productivity was 50.078g·m-2·d-1 (in Shawan). As for the Sub-region, the average photosynthetic productivity of lint in Mid Maturity Sub-region was highest and the value was 21155.020kg·hm-2; the average photosynthetic biomass productivity in Special-early Maturity Sub-region was biggest and the value was 46.563g·m-2·d-1. (2) Cotton average light temperature productivity of lint and cotton average light temperature biomass productivity were 5520.576kg·hm-2 and 12.860g·m-2·d-1 respectively. As far as the whole region is concerned, the limited light temperature productivity of lint was 6242.806kg·hm-2 (in Tulufan) and the most light temperature biomass productivity was 14.244g·m-2·d-1 (in Wusu). As for the Sub-region, both the average light temperature productivity of lint and the average light temperature biomass productivity in Mid Maturity Sub-region were highest and they were 6190.401kg·hm-2 and 13.619g·m-2·d-1 respectively. According to the measure of production potential of cotton, the yield of cotton will increase by 1.630 to 6.345 times than 2001's in Xinjiang. (3) The most light utilization rate of photosynthetic biomass productivity was 7.580%, while that of seed cotton and lint were 3.790% and 1.705% respectively. Cotton average light utilization rate of light temperature biomass productivity was 2.104%, while that of seed cotton and lint were 1.059% and 0.472% respectively. As far as the whole region is concerned, the limited light temperature utilization rate of biomass was 2.301% (in 144 Farm). As for the Sub-region, the average light temperature productivity of biomass in Mid Maturity Sub-region was highest and the value was 2.217%. The paper provides the information for cotton persistence yield, cultivation techniques of cotton high yield and theory study, and the theory basis to find out cotton productive potentiality in Xinjiang.