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农作物的光合作用受内外诸因素的影响,存在着日变化。日变化的最大特点是每天上午、下午各有一个高峰,中午光合作用强度下降,形成一个低谷,即所谓“午睡”现象。为了探明春麦、谷子、玉米、马铃薯“午睡”现象的特征,产生“午睡”现象的原因,及其对产量的影响,我们于1980年做了初步研究,获得了一些结果。研究方法是在分别春麦、谷子、玉米的灌浆期和马铃薯结薯期,选择晴朗天气测定
Photosynthesis of crops affected by internal and external factors, there is a daily change. The most prominent feature of the diurnal variation is that every morning and afternoon there is a peak, and the intensity of photosynthesis decreases at noon, forming a trough, the so-called “nap” phenomenon. In order to explore the characteristics of spring wheat, millet, maize and potato “nap ” phenomenon, the reason of “nap ” phenomenon and the impact on yield, we made a preliminary study in 1980 and obtained some results. The research method is to select spring weather, millet, corn filling period and potato tuber stage