期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

1990

04

315-324

10.13331/j.cnki.jhau.1990.04.001

本校为第一机构

杂交水稻的生育期因海拔、纬度和季节而异。海拔在500～1300m之间,全生育期天数与海拔呈直线回归关系;播种至齐穗天数,海拔在730 m以下的变化较小,海拔升高,变化增大,无论早、晚稻,随纬度增加,齐穗期推迟,每度的延迟率为1.68～2.51 d,杂交晚稻略大于早稻,不同播期间的生育日数变化较大,不同组合间也有差异;以播种至幼穗分化阶段的变异最大,齐穗至成熟阶段次之,穗分化阶段较为稳定,杂交稻生育期间的有效积温值随海拔升高而递减,海拔每升高100 m,齐穗和成熟所需积温值分别减少20～40℃和35～55℃;不同栽培季节,不同纬度及年份间的积温值差异较大,本文运用多元回归分析,建立了几个杂交稻组合生长发...

The growth duration of hybrid rice varies with altitude, latitudeand cultural season. In the range of altitudes from 500~1300 m. total days fromsowing to riping show a line regression relation to altitude. And days fromsowing to heading are nearly the same at the altitude lower than 700 m. Forboth earlyand late rices, the number of days from sowing to heading inrceaseswith the increase of latitude. Increasing rate is 1.68~2.51 days per degreein latitude, and the rate of late. hybrid rice is greater than that of early rice.Growth duration of hyb...