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长期施肥对黑土磷素的影响
作者姓名:HAN Xiao-Zeng  SONG Chun-Yu  WANG Shou-Yu  C. TANG
作者单位:[1]NortheastInstituteofGeographyandAgriculturalEcology,ChineseAcademyofSciences,Harbin,150040(China) [2]DepartmentofAgriculturalSciences,LaTrobeUniversity,Bundoora,Vic3086(Australia)
基金项目:*1Project supported by the Knowledge Innovation Project of Chinese Academy of Sciences (No.KZCX2-413-8) and the Hundred 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) distribution 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, Ca8-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 Ca8-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

Impact of long-term fertilization on phosphorus status in black soil
HAN Xiao-Zeng,SONG Chun-Yu,WANG Shou-Yu,C. TANG.Impact of long-term fertilization on phosphorus status in black soil[J].Pedosphere,2005,15(3):319-326.
Authors:HAN Xiao-Zeng  SONG Chun-Yu  WANG Shou-Yu and C TANG
Institution:Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin, 150040 (China). E-mail: xdhsxzh@mail.hrb.hl.cninfo.ne;Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin, 150040 (China). E-mail: xdhsxzh@mail.hrb.hl.cninfo.ne;Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin, 150040 (China). E-mail: xdhsxzh@mail.hrb.hl.cninfo.ne;Department of Agricultural Sciences, La Trobe University, Bundoora, Vic 3086 (Australia)
Abstract:A twelve-year field trial was carried out to determine the impact of long-term fertilization on phosphorus (P) distribution 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, Ca8-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 Ca8-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.
Keywords:black soil  crop removal  long-term fertilization  phosphorus budget  phosphorus fractions
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