不同栽培密度对水稻新品种“吉农大3号”产量构成的影响

Studied of Yield Formation of Rice “Jinongda 3” under Different Density

在不同栽培密度条件下，对水稻新品种“吉农大３ 号”生育指标及构成产量性状因子进行了研究。分析表明：①随着栽培密度的降低，“吉农大３ 号”分蘖率提高，叶片数增加，生育日数增加；②不同栽培密度环境中“吉农大３ 号”的穗数、粒数差异明显，而株高、粒重趋于稳定；③“吉农大３ 号”的适宜栽培密度为３０ ｃ ｍ ×１７ ｃｍ （２０ 穴／ ｍ ２） ，在小井种稻条件下，产量可达到８ ７００ ｋｇ／ｈ ｍ ２ 以上。

Character of growth and formation of yield of “Jinongda 3”were studied this paper.The analysis results showed that ①tiller number leaf blade number and growth period were increased,as the increase of cultural density.②There were obvious different in the panicle number.Grain number under different cultural density.But,plant height and grain weight kept stable.③The most optioum cultural density was 30 cm×17 cm(20 hole/m 2),and the yield was able to reach more than 8?700 kg/hm 2 under well irrigation.