Impact of Long-Term Fertilization on Phosphorus Status in Black Soil

查看全文 作　　者：HANXiao-[1]Zeng;SONGChun-[1]Yu;WANGShou-[1]Yu;[2]C.TANG

机构地区：[1]NortheastInstituteofGeographyandAgriculturalEcology,ChineseAcademyofSciences,Harbin,150040(China);[2]DepartmentofAgriculturalSciences,LaTrobeUniversity,Bundoora,Vic3086(Australia)

出　　处：《Pedosphere》索引2005年第15卷第3期,共8页

基　　金：1 Project supported by the Knowledge Innovation Project of Chinese Academy of Sciences (No. KZCX2-413-8) and theHundred Talents Program of Chinese Academy of Sciences. 摘　　要：A twelve-year field trial was carried out to determine the impact of long-term fertilization on phosphorus (P) distribu- tion in the soil profile, P balance, and the transformation and availability of soil P in a black soil (Phaeozem, FAO). Under a wheat-soybean-corn rotation, during twelve years where no fertilizer was applied, crops removed 60 and 81 mg P kg-1 soil in the control and NK treatment, respectively. About one third of the P absorbed by crops was originated from organic P. Ca2-P, Cag-P, Al-P and Fe-P were the main forms of inorganic P absorbed by crops. The surplus P from fertilization remained in the 0-20 cm soil layer and increased with the application rate of P. The combined application of NP or NPK increased available P to a lesser extent than the combined application of PK. Fertilizer P had mainly transformed to the Al-P, Fe-P, Ca2-P, and Cas-P forms. By using the P budget (X), changes in total P (Y1) and available P (Y2) in soils under the current cropping system could be predicted by the equations: Y1 = 0.02 + 1.01X and Y2 = 2.08 + 0.15X. 关键词：黑土农作物切除施肥方法磷聚积

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Impact of Long-Term Fertilization on Phosphorus Status in Black Soil

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