作物产量是光合作用的产物,太阳辐射不仅是光合作用的唯一能源,而且能转化为人类可利用的产品如糖、淀粉、蛋白质和纤维等。太阳辐射中只有波长在380—710毫微米范围内的对作物有效,它约占太阳总辐射的45%,即光合有效辐射。研究太阳辐射的分布规律和利用,以提高光能利用率是当前世界科学研究中的重要课题。太阳辐射特征 Crop yield is a product of photosynthesis. Solar radiation is not only the sole energy source for photosynthesis, but also can be converted into human-usable products such as sugar, starch, protein and fiber. Of the solar radiation, only crops with a wavelength in the 380-710 nanometer range are effective, accounting for about 45% of the total solar radiation, ie photosynthetically active radiation. Research on the distribution and utilization of solar radiation in order to improve the utilization of solar energy is an important issue in current scientific research in the world. Solar radiation characteristics