文献类型：期刊文献

英文题名：Organic phosphorus leaching risk from agricultural soils across China

作者：Sun, Xiaolei[1] Bol, Roland[1,2] Klumpp, Erwin[1] Li, Meng[3,4]

第一作者：Sun, Xiaolei

通信作者：Li, M[1];Li, M[2]

机构：[1]Forschungszentrum Julich, Inst Bio & Geosci Agrosphere IBG 3, D-52425 Julich, Germany;[2]Bangor Univ, Sch Nat Sci, Environm Ctr Wales, Bangor, Gwynedd, Wales;[3]Chinese Acad Forestry, Inst Ecol Conservat & Restorat, Beijing 100091, Peoples R China;[4]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China

年份：2022

卷号：9

期号：1

外文期刊名：CHEMICAL AND BIOLOGICAL TECHNOLOGIES IN AGRICULTURE

收录：;Scopus(收录号：2-s2.0-85130750318);WOS:【SCI-EXPANDED(收录号:WOS:000800128600001)】；

基金：The authors are grateful to the China Scholarship Council (CSC: 201904910544). We thank Dr. Xiangru Zhang, Mr. Chao Yang, Mr. Zhurui Tang, Mr. Songyan Li, Mr. Duo Wang, and Dr. Shengqun Liu for their assistance in soil sampling across China.

语种：英文

外文关键词：Phosphorus (P) leaching; Available organic P (AP(O)); CaCl2-extractable organic P (CaCl2-P-O); Fe/Al oxides

摘要：Background: Leaching from agricultural land is one of the major pathways of phosphorus (P) loss from soils to waterbody and may induce adverse effect on territorial environment. Past studies usually focused on the loss of inorganic P (P-I) while ignored the role of organic P (P-O) in leaching process. A total of 63 agricultural soil samples were collected from across China with various soil types including 21 paddy soils, 13 chernozems, 11 red soils and other type soils (n = 18) to identify the potential risk of P-O and P-I leaching from agricultural lands and to explore their relationships with soil basic properties, Fe/Al oxides, and P status. Results: CaCl2-extractable organic P (CaCl2-P-O) accounted for 8-89% (35% on average) of CaCl2-extractable total P (CaCl2-P-T) and available organic P (AP(O)) accounted to over half of available total P (AP(T)) (57 +/- 25%). CaCl2-P-T was positively correlated with AP(T) under all soil types except paddy soils. CaCl2-extractable inorganic P (CaCl2-P-I) and available inorganic P (AP(I)) were strongly correlated for chernozem (r = 0.968), while CaCl2-P-O the was strongly correlated with AP(O) for red soils (r = 0.901). Conclusions: P-O greatly contributed to the potential P leaching risk and should be included in the risk assessment of total P leaching. The control of soil AP(T) excess accumulation in both P-O and P-I fractions in agricultural land is the key point to cut down P leaching. Mitigation measures to limit P-O leaching should be established based on the soil types.