经济合理地施用肥料,提高投肥的经济效益,现在越来越被人们所重视,围绕这个问题的研究也越来越深入。合理施肥既要考虑到当季作物的肥料施用问题,也应考虑到在一定的轮作周期中各季作物的肥料合理分配问题。在轮作周期中,不同作物对各种肥料的效应是有差异的,而且施于前季作物的 The economical and reasonable application of fertilizers to improve the economic benefits of fertilizing is now more and more people attach importance to the study of this issue is also more and more in-depth. Reasonable fertilization should take into account the issue of fertilizer application of the crop, but also should take into account the crop rotation in a certain period of rational distribution of fertilizers. In the rotation cycle, the effect of different crops on various fertilizers is different, and applied to the previous crop