不同密度群体对寒地水稻分蘖及产量的影响

在不同栽培密度条件下,对黑龙江2个主栽品种的分蘖、10株主茎干重、成穗率及产量进行研究。结果表明:随平方米穴数的减少,主栽品种的分蘖数增加;不同密度群体对10株主茎干重前期影响较小,后期影响较大,密度越稀的群体,后期每穴或每株主茎干物质积累越多,对空育131影响较垦稻12号大,成穗率差异不显著;不同密度群体下,空育131产量差异显著,垦稻12号差异不显著,空育131适宜密植。

Effect of Density on Tiller and Yield of Rice in Cold Area

The tillering capacity,dry weight of 10 main stems,productive panicle rate and yield of two rice varieties planted in large area in Heilongjiang were studied.The results were as follows:The tillers increased with the decrease of hills per square meter;density had less effect on 10-stem dry weight at early stage,but more at late stage.The dry matter per hill or per main stem accumulated much more in sparse population at late stage,especially for Kongyu 131.There was no significant difference in productive panicle rate.As for Kongyu 131,the yields were different at different density,and it was suitable for dense planting.