摘要
对塿土12年连续施肥后土壤剖面养分分布的研究发现，施肥使有机质、全P在耕层(0～20cm)与CK比较有不同程度的增加；施肥可以显著影响0-200cm土壤剖面有机质的含量；PK处理土壤剖面存在P素适度下移，120-220cm全磷含量呈现峰值；施肥对塿土耕层及0-300cm剖面全K含量几乎无影响；缕土粘化层可以减缓养分的下移；氮磷钾化肥与有机肥配合施用，使土壤NO3^--N与CK比较有适度增加．对培育土壤肥力有利。
Nutrient distributions of the profiles of loess soil were studied after fertilizer were applied for 12 years continuously. The results showed that organic matter and total P of fertilization treatments were increased in the 0~20cm soil layer were higher than that of CK, organic matter content was different in 0~200cm profile of loess soil. The treatments of P,K phosphorus leaching loss in the soil profile and total-P content was higher in the 120~220cm soil profile. Total K content in 0~300cm soil profile almost invariableness with application Potassium .Laying horizon of loess soil was the efficient way to control nutrient leaching loss. Application N,P,K combined with organic manure was the best way to increase NO3--N than that of CK, and it could improve fertility of loess soil.
出处
《中国农学通报》
CSCD
2004年第5期139-142,147,共5页
Chinese Agricultural Science Bulletin
基金
国家科学技术部"国家野外台站试验站土壤肥力与肥料效益监测基地网"项目([2000]国科基便字第076号)。
