摘要
在湖南长沙和郴州,以天优华占为材料,研究了不同移栽密度(每公顷37.0万穴和22.2万穴)和不同施氮量(每公顷0,120,165和210 kg)条件下,超高产水稻干物质生产积累与产量形成。结果表明:相同移栽密度下,施氮可提高超高产水稻在齐穗期和成熟期的干物积累量及产量,但各施氮处理间没有显著差异。施氮还会降低收获指数。施氮对产量构成的影响存在地区间差异,在长沙增施氮肥增加了有效穗数、颖花数和千粒重,而在郴州主要是增加了有效穗数。
To explore the effects of transplanting densities （37.0 × 10^4, 22. 2×10^4 hill/hm^2） and nitrogen application rates （0, 120, 165 and 210 kg/hm^2） on dry matter production, yield and its components of super late rice, field experimenrs were conducted with Tianyouhuazhan as material in Changsha anti Chenzhou in 2008. The results showed that dry matter accumulation and grain yield of super rice was increased by nitrogen application under two transplanting densities, while no significant difference existed among nitrogen application treatments. Harvest index was decreased by nitrogen application, Effecrs of nitrogen application on yield components existed clear regional difference. The yield increase after nitrogen application resulted from the increase of effective panicle, spikelet number per panicle and 1000-grain weight in Changsha, while it mainly hy increase of effective panicle in Chenzhou.
出处
《作物研究》
2008年第4期278-281,共4页
Crop Research
基金
农业部超级稻配套栽培技术开发与技术集成项目
湖南省超级稻"三定"栽培技术研究项目
关键词
水稻
栽培
施肥
氮肥
Rice
Cuhivation
Fertilization
Nitrogen fertilizer
