光照和温度对旱地小麦叶面积指数的影响

Abstract

Abstract: In order to explore the effect of light and temperature on wheat leaf growth, a regression orthogonal test was firstly designed, and the effects of light and temperature on leaf area index of wheat were simulated using APSIM model. The results showed that APSIM model could be used to simulate the LAI of wheat. There was an upward-opening second-degree parabola between wheat LAI and light but a downward-opening one between wheat LAI and temperature. The second-degree parabola between LAI and light was in a decrease, but the light effect was positive when light was not exceeded the critical value, which revealed that a rational increase of light could promote wheat growth under suitable conditions. The temperature effect was positive when the daily temperature was higher than 7.73 ℃, which revealed that a rational increase of temperature could stabilize the wheat LAI at a high value at a certain growing stage. When both light and temperature were increased, the positive effect of light was more significant than that of temperature.

Key words:

APSIM, wheat, light, temperature, leaf area index, Dingxi, Gansu province

NIE Zhi-gang, LI Guang. Effects of Light and Temperature on Leaf Area Index of Wheat in Dryland[J]., 2013, 30(5): 894-898.

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Effects of Light and Temperature on Leaf Area Index of Wheat in Dryland

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