摘要
研究了在不同密度下两优培九和E52抽穗整齐度和产量差异。结果表明,对照18丛/m2处理抽穗历期比9丛/m2短3～4d,抽穗高峰提前,单茎株高变异小3cm左右,每穗粒数变化小20粒左右,对照抽穗整齐度较好。单位面积的产量两品种均以在13 5丛/m2下最大,两优培九在密度13 5丛/m2处理比对照高出2 9%,增产优势因子主要是穗实粒数,增产贡献达117 3%,;E52在13 5丛/m2比对照高出8 9%,E52增产优势因子也主要是穗实粒数增加,增产贡献达214 3%,千粒重和每平方米穗数都下降;适宜的种植密度,不仅能提高单丛产量,也能提高单位面积水稻产量,但抽穗整齐度有待提高。
Different panicle uniformity and yield was studied with two hybrid combination, Liangyoupeijiu and E52 in the different density. Results indicated that, plant height and panicle size was uniform, and heading period was shorter in spare planting compared with dense planting. Yield per unit was higher in 13.5 hills/ m^2 than that in 18 hills/ m^2 and 9 hills/ m^2 for two rice hybrids. Yield was 2.9% higher in 13.5 hills/ m^2 than that in 18 hills/ m^2 and 9 hills/ m^2 for Liangyoupeijiu and 8.9% for E52.
出处
《西南农业学报》
CSCD
2004年第6期720-723,共4页
Southwest China Journal of Agricultural Sciences
基金
农业结构调整重大研究专项(2003-01-02A)
关键词
杂交稻
种植密度
穗整齐度
产量
hybrid
planting density
panicle uniformity
yield
