摘要
为给应对气候变暖而进行播期战略性调整和确定播量提供科学依据,以济麦20为供试材料,对时间跨度为67d的12个播期的冬小麦生长及所需积温进行了对比研究。结果表明:随着播期的推迟,播种-出苗期需0℃以上积温有所增加,冬前主茎每长1叶、冬后关键生育期和全生育期所需0℃以上的积温大幅度减少。晚播处理的苗后积温利用率显著提高,推迟播期有利于节约光热资源,为上茬秋作物腾出较多积温,让其在田间充分灌浆和成熟。
In order to provide basis for adjusting the sowing time and norm, the experiment with twelve sowing times spaned 67 days for winter wheat variety Jimai 20 was conducted to study the growth and required accumulated temperature. The results showed that the later the winter wheat was sowed, the more accumulated temperature （ 〉 0℃ ） was required from sowing stage to emergence of seedling stage. When winter wheat growed every leaf before over-wintering, the required accumulated temperature （ 〉 0℃ ） in the growing period after over-wintering and in the full growing period of winter wheat decreased significantly. The utilization rate of the accumulated temperature after seedling for the late sowing treatment increased significantly, which saved the solar energy and leave more accumulated temperature for previous crops to fill and ripe.
出处
《中国农业气象》
CSCD
2009年第2期201-203,共3页
Chinese Journal of Agrometeorology
基金
"十一五"国家科技支撑计划(2006BAD02A09-FS08)
关键词
冬小麦
济麦20
播期
积温
Winter wheat
Jimai 20
Sowing time
Accumulated temperature
