Effects of Potassium Application on the Photosynthetic Characteristics, Yield, and Fiber Properties of Different Transgenic Cotton Varieties
Three transgenic cotton varieties, transgenic Bt+CpTI insect-resistant cotton CCRI 41, transgenic Bt insect-resistant cotton Guokang 1 and Simian 3, were used in the field experiments to analyze the effects of potassium application on the photo-synthetic characteristics, yield and fiber properties of different transgenic cottons. The results showed that applying potassium before cotton seedlings transplanted increased chlorophyll content, LAI, PS 11 maximal photochemical efficiency(Fv/Fm), PS II potential activity (Fv/ Fo), net photosynthetic rate (Pn), stomata conductance (Gs), and accumulation of biomass and the proportion oi distributed to reproductive organs in plant, and total bolls per hectare, boll weight and lint percentage. Lint yield of CCRI 41, Guokang 1 and Simian 3 were increased by 5.83%, 11.75% and 7.01%, respectively. In addition, fiber qualitative characters, such as 2.5% span length, tenacity, micronaire value and length uniformity were also improved. Transgenic Bt insect-resistant cotton Guokang 1 responded more active to potassium fertilizer than transgenic Bt+CpTI insect-resistant cotton CCRI 41 and Simian 3.
国家科技期刊平台
NSTL
万方数据
维普
