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1987～1989年在沈阳黄土性母质棕壤(棕黄土)农田上设置田间试验。结果表明,覆膜栽培的玉米生物量、籽实产量,植株吸磷量均显著提高,地力消耗较之一般栽培条件显著增加。配合施用有机肥能提高玉米产量和土壤供磷能力。要维持玉米产量9000kg/ha,需施用化肥P_2O_5 160kg/ha或有机肥P_2O_5 230kg/ha。提高土壤有效磷1mg/100克土,在不覆膜时,需施P_2O_5 119.4 kg/ha。施用有机肥可保持土壤磷素平衡,土壤磷组分分析表明,施用猪厩肥,在棕壤中主要转化成与有效磷呈极显著相关的AI-P,供磷能力增强。
Field experiments were conducted on farmland of loessial parent brown soil (brown loess) from 1987 to 1989. The results showed that the maize biomass, seed yield and phosphorus uptake capacity of plastic film mulching increased significantly, and the soil fertility was significantly increased compared with the normal cultivation conditions. Combined with organic fertilizer can improve corn yield and soil phosphorus supply capacity. To maintain corn production 9000kg / ha, the need to apply fertilizer P_2O_5 160kg / ha or organic fertilizer P_2O_5 230kg / ha. Increase soil available phosphorus 1mg / 100 grams of soil, in the absence of film, the need to apply P_2O_5 119.4 kg / ha. The application of organic manure can maintain the balance of soil phosphorus. The analysis of phosphorus in soil showed that the application of pig manure increased the conversion of AI-P, which was significantly correlated with available phosphorus, in brown soil.