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以辽棉19号和美棉33B为材料,研究了不同施氮量(0、240、480kg·hm-2)和不同种植密度(75000、97500、120000plants·hm-2)对东北特早熟棉区棉花棉铃生物量和氮素累积特征的影响.结果表明:棉花单铃、棉籽和纤维的生物量及其氮素累积随棉花生育进程的动态变化均符合“S”型曲线,种植密度和施氮量可以显著影响棉铃各部分生物量和氮素累积的动态特征,以及棉花产量与品质;在施氮量240kg·hm-2和种植密度97500plants·hm-2处理下,单铃、棉籽和纤维的生物量均达到最大,生物量和氮素累积的快速累积起始时间和终止时间较早但持续时间较短,生物量快速累积速率最大,生物量和氮素在铃壳中的分配系数最低,在棉籽和纤维中分配系数最高.
The effects of different nitrogen rates (0, 240, 480 kg · hm-2) and different planting densities (75000, 97500 and 120000plants · hm-2) The results showed that the biomass and nitrogen accumulation of cotton bolls, cottonseed, and fiber all accorded with the “S” curve according to the dynamic changes of cotton growth process. The planting density and application rate Nitrogen content could significantly affect the dynamic characteristics of biomass and nitrogen accumulation in different parts of cotton bolls, as well as the cotton yield and quality. Under the nitrogen application rate of 240 kg · hm-2 and planting density of 97500 plants · hm-2, single boll, cottonseed and fiber Biomass and nitrogen accumulated faster and earlier but with shorter duration and fastest accumulation rate of biomass, and biomass and nitrogen had the lowest distribution coefficient in boll shell , The highest partition coefficient in cottonseed and fiber.