According to the earth condition,wheat adaption ability to fertilizer and productivity requirements, we conclude the following three fertilizer principles:
Spreading organic fertilizer as basic fertilizer, blend organic fertilizer and inorganic fertilizer. Organic fertilizer features wide source,low cost,full nutrition,long-term fertilizer efficiency,improve earth conditions,etc. It can increase wheat productivity and improve soil fertility. But because of the large amount requirements,slow efficiency, we have to supply a certain nutrition by spreading chemical fertilizer. Only in this way, can we ensure the improvement of soil fertility and sustainable increase of yield.