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本文分析了江苏省淮北沭阳地区小麦群体光能利用状况。在小麦全生育期内,该地区太阳总辐射量为70.4千卡/厘米~2,约占全年总辐射量的60％。不同产量水平小麦光能利用率依次为高产田>过旺田>一般大田。高产小麦经济产量的光能利用率为0.46％,生物产量的光能利用率为1.13％。小麦一生中光能利用率高峰期出现在孕穗至灌浆阶段。此阶段LAI为7时,生物产量日增重最大。文中还对提高小麦光能利用率的途径作了讨论。
This paper analyzes the light energy utilization status of wheat populations in Shuyang, Huaibei, Jiangsu Province. During the whole wheat growth period, the total solar radiation in the area is 70.4 kcal / cm 2, accounting for about 60% of the total annual radiation. The light utilization efficiency of wheat with different yield levels was high yield field> over field> general field. The light energy utilization rate of high yield wheat is 0.46%, and the light energy utilization rate of biomass is 1.13%. The peak period of light energy utilization in wheat during the booting stage to the filling stage. At this stage LAI is 7, the maximum daily gain of biological yield. The article also discussed ways to improve the utilization of wheat light energy.