Effect of N Fertilization and Transplanting Density on Yield and Yield Components of Super Hybrid Rice,Yi You 673
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摘要: 以超级杂交稻宜优673为试验材料,分析不同氮肥用量和栽插密度对产量及其结构的影响。结果表明,在中等肥力水平的稻田土壤,氮肥用量对千粒重影响较小,对穗数、每穗粒数和结实率影响较大。栽插密度对宜优673每穗粒数、结实率和千粒重的影响较小,对穗数影响较大。施纯氮为180kg·hm-2、栽插密度为21.5万丛·hm-2时,有利于宜优673组合的穗数、每穗粒数、结实率和千粒重关系的均衡协调,产量达到9.498 7t·hm-2。Abstract: Effect of N fertilization(i.e.,0,120,180and 240kg·hm-2)and the transplanting density(i.e.,14.1 ×104,18.4×104 and 21.5×104 holes.km-2)on the yield and yield components for super hybrid rice,Yi You 673,were studied in the field experiments conducted in 2012.N fertilizer was found to affect more significantly on the panicle number,grain number per panicle and seed-setting rate than the 1000-grain weight.The effect of transplanting density on the panicle number was higher than those on the grain number per panicle,seed-setting rate and 1000-grain weight.When 180kg·hm-2 N and a transplanting density about 21.5×104 holes.km-2 in the medium-fertility field were applied for the cultivation of Yi You 673m,its yield could be maximized.
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Key words:
- hybrid rice /
- Yi You 673 /
- nitrogen fertilizer /
- transplanting density /
- yield
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