Forms, transformations and availability of phosphorus after 32 years of manure and mineral fertilization in a Mollisol under continuous maize cropping

文献类型： 外文期刊

第一作者： Li, Cuilan

作者： Li, Cuilan;Zhang, Peng;Zhang, Jinjing;Zhang, Peng;Zhang, Jinjing;Zhu, Ping;Wang, Lichun

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关键词： Phosphorus fractions; mineral fertilizer; pig manure; chemical sequential fractionation

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）

ISSN： 0365-0340

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收录情况： SCI

摘要： A 32-year field experiment was performed to examine the impact of applications of pig manure and mineral fertilizers alone or in combination on phosphorus (P) forms, transformations and availability in a Mollisol. The concentrations of total P, Olsen P, inorganic P (Pi) and organic P (Po) and their fractions were generally higher in treatments with than without mineral fertilizers and manure, and with high than with low manure rate. The proportions of Olsen P to total P, dicalcium bound P (Ca-2-P) and octacalcium bound P (Ca-8-P) to Pi and labile Po (LPo) to Po were significantly higher in manured than in unmanured treatments. The direct path coefficient of Ca-2-P on Olsen P (1.63) was larger than that of other P fractions on Olsen P (-0.87 to 0.24), and the indirect path coefficients of all P fractions on Olsen P via Ca-2-P (1.50 to 1.62) were greater than those through other P fractions (-0.86 to 0.24). The results suggested that manure promotes accumulation of Ca-2-P and LPo, and mineral fertilizers combined with high-rate manure are especially effective for improving P availability. Contributions of other P fractions on Olsen P are mainly via their indirect effects for Ca-2-P.

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