新疆麦茬复播向日葵光合性能与产量的研究

Study on Relationship between Photosynthesis Characteristic and Yield of Multiple Cropping Sunflower

对麦茬复播4个向日葵杂交种光合性能与产量的分析研究结果表明:新葵10号最大叶面积指数为3.6,而新食葵6号最大叶面积指数为5.8。向日葵不同品种在生长期单位面积的干物质积累变化呈"S"型曲线,但新食葵6号的干物质积累较大,与产量不成正比。复播油葵单株光合势变幅在5.93～16.86m2.d,光合势与生物产量和子实产量呈显著正相关。全生育期净光合效率的平均值为10.08g/m2.d。

Through analysising the relationship between photosynthesis characteristics and yield of multiple croppingsunflower of 4 hybrids in wheat stubble, the growth dynamics of ence of photosynthetic index of various varieties were co photosynthetic characteristic was analysized and differin this experiment. The results showed that the maximum leaf area index of Xinkui 10th and Xinshikui 6th was 3.6 and 5.8, respectively. Change trend of dry matter accumulation per unit area of different varieties of sunflowers was in ＂S＂ curve, but Xinshikui 6th accumulated lar- ger amount of dry matter and the output was not proportional. Photosynthetic potential of multiple cropping sunflower changed in the range of 5.93-.95m^2 .d,and the relationship between photosynthetic potential and biomass yield as well as seed yield was correlated significantly. The average of net photosynthetic efficiency was 10.08g/m^2 ·d in the whole growth period.