早稻结实率与气象因子的相关性分析

Correlation Analysis of Early-season Rice Seed Setting Rate and Meteorology Factor

[目的]科学地利用气候资源,以保证早稻高产稳产。[方法]应用1993～2008年柳州沙塘早稻生育状况观测资料及同期气象观测数据,利用统计分析对早稻开花期、乳熟前期和乳熟后期的平均日最高气温、平均日降水量和平均日照时数与水稻空壳率、秕谷率进行相关性分析,分析早稻各生育期气象要素对早稻结实率的影响。[结果]早稻空壳率随着开花期平均日照时数的增加而减少;秕谷率随着乳熟前期平均日降水量的增加而增加,随着乳熟后期平均日降水量的增加而增加,随着平均日照时数的增加而减少。[结论]早稻结实率与气象因子相关。根据其变化适当地进行人工调节,可降低早稻空壳率,提高产量。

[Objective] The high and stable yield of ear-season rice could be realized through the scientific use of climate resource.[Method] The correlation among average maximum daily temperature,average daily precipitation and average daily sunshine hour in the flowering period,the former and late of milky stage of early-season rice,and the rate of empty grain,the rate of bad seed was statistically analyzed with the data from 1993-2008 in Shatang of Liuzhou City.The impact of the meteorological factor in the different growth stages on seed-setting rate of early-season rice was discussed.[Results] The rate of empty grain of early-season rice was reduced with the average sunshine hour-increasing in its flowering period;the rate of bad seed was raised with the increment of the average precipitation in the former of milky stage and also with the increment of average precipitation in the late of milky stage of early-season rice;the rate of bad seed was reduced with the average sunshine hour-increasing.[Conclusion] The seed-setting rate of early-season rice was associated with the meteorological factors.The appropriate adjustment could reduce the rate of empty grain of early-season for its yield increasing.