Phosphorus source coefficient determination for quantifying phosphorus loss risk of various animal manures

文献类型： 外文期刊

第一作者： Wang, Y. T.

作者： Wang, Y. T.;Zhang, T. Q.;Tan, C. S.;Hu, Q. C.

作者机构：

关键词： Soil test phosphorus;Phosphorus loss;Manure management;Nutrient Management;Phosphorus source coefficient

期刊名称：GEODERMA （ 影响因子：6.114； 五年影响因子：6.183 ）

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收录情况： SCI

摘要： Quantification of phosphorus (P) loss risk of animal manures is essential to scientifically sound P risk assessment and environmental friendly nutrient management, but has faced significant challenges due to the shortage of appropriate techniques. This study was conducted to determine P source coefficients (PSC) for quantifying differential P loss risk of various manures relative to soluble chemical fertilizer. After 2-d, 2-week, 8-week, and 26-week soil incubations with various manures, P-amended soils were analyzed for Olsen P (Ol), Mehlich-3 P (M3), water extractable P (WEP), and Fe-oxide coated filter paper strip P (FeO), each of which was then used to calculate manure PSC. Manure PSCM3 had the strongest linear relationships (r(2) = 0.95-0.97) among different incubation durations, compared with PSCWEB (r(2) = 0.79-0.91), PSCOl (r(2) = 0.85-0.94), and PSCFeO (r(2) = 0.88-0.91). The 2 week incubation yielded PSCM3 which had the strongest linear relationships (r2 = 0.87-0.97 with a mean of 0.95) among the tested soils, compared with those from 2-d, 8-week, and 26-week incubations. In addition, laboratory PSCM3 had the strongest linear relationships with those PSCM3 measured under field conditions, relative to PSCOl, PSCFeO, and PSCWEP. Hence, the 2-week incubation along with Mehlich-3 P yielded the most consistent PSCs for various manures across soil types, incubation durations, and soil conditions, and can be recommended as a common protocol for determining manure PSC. The recommended default PSC values are 110, 65, 46, and 43% for liquid swine, liquid dairy, solid poultry, and solid beef manures, respectively, for the new P index of Ontario. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.

分类号： S15

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