光温因子与玉米产量的关系

The Relationship of Light and Temperature Factor and Yield Maize

在山东省境内采用不同区域分期播种 ,形成自然条件下光温值的差异 ,系统分析光、温因子与玉米产量的关系。结果表明 ,玉米生育期间的积温、日照与产量及产量因素值呈极显著正相关 ,积温的直接效应最大 ,日照通过积温的间接效应最大。开花至成熟阶段的日照时数对穗粒数影响明显 ,日平均温差与积温呈负相关关系并对千粒重和产量产生负效应。产量和千粒重以鲁西最高 ,由鲁西向鲁东依次递减 ,穗粒数以鲁中最高。高产玉米全生育期需积温 2 50 0℃左右 ,日照 70 0 h左右 ,开花至成熟阶段需积温 1 1 50℃左右 ,日照大于 3 0 0 h。

In Shandong province, by the use of sowing in different of stages different region, the difference of light and temperature factor under natural conditions were formed. Systematically analysis effects of coefficient of light and temperature factor on yield and its components in maize were also presented. The results showed that accumulated temperature and sunshine during the growing period was significantly correlated with the yield and its components. The direct accumulated temperature is the obvious greatly, the indirect effect of sunshine by accumulating temperature is the most remarkable. From flowering to maturity, sunshine affected the grain numbers per ear obviously. Average diurnal difference of temperature was negatively correlated with thousand grain weight and yield.Yield and thousand grain weight is supreme in the west of shandong province and decreased from the west to the east in shandong province, the grain numbers per ear were supreme in the middle of shandong province .Accumulated temperature and sunshine time of high of high yielding maize during the growing period and from flowering to maturity were 2 500℃ or so,1 150℃ or so and 700 hours or so, larger than 300 hours respectively.