双季晚稻空壳率与气象因子的灰色关联度分析

根据1980～2006年金华市双季晚稻农业气象观测资料及气象观测资料,运用灰色关联度分析方法对双季晚稻抽穗期相关气象因子与双季晚稻空壳率进行了比较分析。结果表明,双季晚稻抽穗期降水量2、0℃负有效积温是空壳率高低的主要影响因素,抽穗期多雨水天气或强冷空气是造成双季晚稻空壳率上扬的主要不利气象条件,并探讨了趋利避害的相关途径,为水稻高产栽培提供参考依据。

Analysis of the Grey Correlation Degree between Empty Grain Rate of Double-seasan Late Rice and Meteorological Factor

According to the agricultural meteorology data in the period of double-season late rice growth and meteorology data in Jinhua city from 1980 to 2006,the meteorological factors during heading date and empty grain rate of double-season late rice were analyzed with the method of grey correlation degree analysis.The results were as follows: the precipitation and negative efective accumulate temperature of 20 ℃ during heading date of double-season late rice were the major affecting factors for empty grain rate,and wet weather and strong cold air during heading date were the major adverse meteorologic conditions,at the same time,the approaches to pursue advantages and avoid detriments were discussed,all these provided a reference basis for high-yielding cultivation in rice.