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以杂交粳稻组合常优5号为材料,研究了不同施氮总量和氮磷钾配比处理对该组合制种产量及产量构成因素的影响。结果表明,施氮总量提高会导致异交结实率和千粒重下降,从而降低产量,而2种不同的氮磷钾配比对产量没有影响。相关分析表明,每穗实粒数、千粒重与产量的相关性达到极显著水平,异交结实率与产量的相关性达到显著水平。在江苏苏州地区,常优5号制种的合理施氮总量控制在247.5 kg/hm2左右。
The hybrid japonica rice combination Changyou 5 was used as material to study the effects of different N application rates and N, P and K fertilization treatments on the yield and yield components of the combined seed production. The results showed that the increase of total N application resulted in the decrease of the rate of outcrossing and 1000-grain weight, thus reducing the yield. However, the yield of two different N, P and K ratios was not affected. Correlation analysis showed that the correlation between grain number per panicle, 1000-grain weight and grain yield reached a significant level, and the correlation between seed-setting rate and yield was significant. In Suzhou, Jiangsu Province, the optimal nitrogen application for seed production of Changyou 5 was controlled at about 247.5 kg / hm 2.