Abstract:

Under the double cropping pattern in the North China Plain,based on the conventional application level of phosphorus,a phosphorus-deprived level without phosphorus fertilizer was adopted at the same time for three previous crops,corn,soybean and peanut,and then the soil nutrient concentration after previous crop harvesting and the grain yield and nutrient accumulation of winter wheat,the subsequent crop,were examined,to provide a proposal for crops planting in the North China Plain.The results showed that,for the soil nutrients after the previous crop harvesting,the soil total phosphorus concentration was higher in the previous soybean treatment without phosphorus fertilizer,and the concentration in peanut previous treatment was similar to that under conventional fertilizers;the soil available phosphorus content was higher overall in the previous peanut treatment;the soil nitrate and ammonium nitrogen concentrations were both highest in the previous soybean treatment.For post-crop wheat,wheat thousand grains weight,yield,seed N and P accumulation and N fertilizer bias productivity were all higher in the previous peanut treatment without phosphorus fertilizer.The previous peanut treatment increased by 0.60%,6.19%,15.46%,18.11% and 6.21%,respectively,compared to the previous maize treatment,and increased by 2.18%,7.30%,17.66%,13.40% and 7.30%,respectively,compared to the previous soybean treatment.In summary,in order to ensure soil nutrient balance,peanut was selected as a suitable previous crop in summer before winter wheat as a better model for crop mix in the southern two maturity zones of the North China Plain at low phosphorus levels.

Key words: Wheat, Previous crop, Phosphate scarcity, Soil nutrients, Yield, North China Plain