习惯上认为增加作物产量就要和土壤争夺养分,其实不然。作物从土壤中获得的养分是少量的,土壤劣化的原因主要是水土流失和风蚀造成,而提高作物产量对于控制水土流失和风蚀是最有效的措施了。首先,提高作物产量给土壤表面和耕层留下了较多的残留物,能够补充土壤碳素和其他多种营养 It is customary to think that increasing crop yields will compete with soil for nutrients, but it is not. The nutrients that the crop receives from the soil are small. The main reason for soil degradation is soil erosion and wind erosion. Increasing the crop yield is the most effective measure to control soil erosion and wind erosion. First, increasing crop yields leave more residue on the soil surface and topsoil, and can supplement soil carbon and other nutrients