Application of straw and chemical fertilizer could be regarded as a kind of nutrition-resources-saved fertilizationsystem and could provide crop nutrition efficiently.
秸秆还田与氮磷配施可有效供应作物养分，是一种养分资源节约型的施肥制度。
2
Ecological balanced fertilization is new fertilizationsystem, which is considered from soil-environment-human. Based on the theory of its model and carried by ecological fertilizer.