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为探明施氮量和栽插苗数对新型杂交早稻新品种“鄱优364”产量形成的影响,在16.67 cm×20 cm同一栽插规格下,探讨其不同施氮量(0,120,150,180,210 kg/hm25个水平)和栽插苗数(2,3,4根/穴3个水平)下产量及其构成等指标的差异性。结果表明:施氮量对产量、有效穗数、每穗粒数、结实率和千粒质量具有极显著影响,纯氮为210 kg/hm2时,增穗、增产效果均不明显,反而降低了每穗粒数和结实率;随着栽插苗数增加,产量和有效穗数也随之增加,每穗粒数随之降低,结实率和千粒质量呈降低趋势;施氮量和栽插苗数互作对产量、每穗粒数、结实率和千粒质量有极显著影响,随着施氮量和栽插苗数的增加,产量增加,然而每穗粒数、结实率和千粒质量随着施氮量和栽插苗数的增加而减少,对有效穗数无显著影响。施氮量180 kg/hm2结合栽插苗数4根/穴有利于“鄱优364”增产。
In order to explore the effects of nitrogen application rate and planting density on the yield formation of a new early hybrid rice variety “Poyou 364”, the effects of nitrogen application rate (0,120,150,180,210 kg / hm25 level) and the number of planting seedlings (2,3,4 root / hole 3 levels) yield and its composition and other indicators of the difference. The results showed that nitrogen application had a significant effect on yield, effective panicle number, grain number per spike, seed setting rate and grain weight per 100 grains. When pure nitrogen was 210 kg / hm2, Grain number per spike and seed setting rate. With the increase of planting number, the yield and effective panicle number also increased, the grain number per panicle decreased, the seed setting rate and grain weight tended to decrease. Seedling number interaction had a very significant effect on grain yield, grain number per spike, seed setting rate and grain quality. With the increase of nitrogen fertilizer application and the number of planted seedlings, the grain yield increased. However, grain number per spike, seed setting rate and grain weight per 1000 grains With the amount of nitrogen application and the number of planted seedlings decreased, the number of effective panicles had no significant effect. Nitrogen application rate of 180 kg / hm2 combined with the number of transplanting seedlings per plant was 4 per hole, which was beneficial to increase production of “Poyou 364 ”.