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作物生长与结实,实质上就是将太阳光能转化为化学潜力的光合作用的过程。光合作用的利用率的高低,直接影响产量的高低。就现代农业生产水平较高的国家来看,光合作用利用率为2--2. 5%。但从全世界范围来看,还有不少地区光合作用的利用率还在1%以下。光合作用利用低的原因是多方面的,但其主要方面,是由于作物品种生产性能低,肥料缺乏,病虫为害以及旱涝等因素所造成。
Crop growth and seed, in essence, is the process of converting sunlight into a chemical potential for photosynthesis. The level of utilization of photosynthesis, a direct impact on the level of output. For countries with a high level of modern agricultural production, photosynthesis utilization is 2--2.5%. However, from a global perspective, there are still many areas where photosynthesis utilization is still below 1%. The reasons for the low utilization of photosynthesis are manifold, but the main aspects are due to factors such as poor performance of crop varieties, lack of fertilizers, pests and diseases and droughts and floods.