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Forms, transformations and availability of phosphorus after 32 years of manure and mineral fertilization in a Mollisol under continuous maize cropping
Archives of Agronomy and Soil Science ( IF 2.4 ) Pub Date : 2020-07-14 , DOI: 10.1080/03650340.2020.1787385
Cuilan Li 1 , Peng Zhang 1, 2 , Jinjing Zhang 1, 3 , Ping Zhu 3 , Lichun Wang 3
Affiliation  

ABSTRACT

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 (Ca2-P) and octacalcium bound P (Ca8-P) to Pi and labile Po (LPo) to Po were significantly higher in manured than in unmanured treatments. The direct path coefficient of Ca2-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 Ca2-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 Ca2-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 Ca2-P.

Abbreviations: CK: control; NPK: nitrogen, phosphorus and potassium fertilizers; M1: pig manure at low rate; M2: pig manure at high rate; TP: total phosphorus; Pi: inorganic phosphorus; Po: organic phosphorus; Ca2-P: dicalcium bound phosphorus; Ca8-P: octacalcium bound phosphorus; Ca10-P: phosphorite bound phosphorus; Al-P: aluminum bound phosphorus; Fe-P: iron bound phosphorus; O-P: occluded iron/aluminum bound phosphorus; LPo: labile organic phosphorus; MLPo: moderately labile organic phosphorus; MRPo: moderately resistant organic phosphorus; HRPo: highly resistant organic phosphorus; PAC: phosphorus activation coefficient; SOC: soil organic carbon; TN: total nitrogen; PCA: principal component analysis.



中文翻译:

连续玉米种植条件下,在 Mollisol 中施肥和矿物施肥 32 年后磷的形式、转化和有效性

摘要

进行了一项为期 32 年的田间试验,以检查单独或结合使用猪粪和矿物肥料对 Mollisol 中磷 (P) 形式、转化和可用性的影响。总P、Olsen P、无机P(Pi)和有机P(Po)及其组分的浓度在施用化肥和有机肥处理中普遍高于不施用化肥和有机肥处理,施用高于施用低施用量处理。Olsen P 与总 P 的比例、二钙结合 P (Ca 2 -P) 和八钙结合 P (Ca 8 -P) 与 Pi 和不稳定 Po (LPo) 与 Po 的比例在施肥处理中显着高于未施肥处理。Ca 2的直通系数Olsen P 上的 -P (1.63) 大于 Olsen P 上的其他 P 组分(–0.87 至 0.24),并且 Olsen P 上所有 P 组分通过 Ca 2 -P的间接路径系数(1.50 至 1.62)更大比通过其他 P 分数的那些(–0.86 到 0.24)。结果表明,粪肥促进Ca 2 -P 和LPo 的积累,矿物肥料与高效粪肥结合对提高磷的有效性特别有效。其他 P 组分对 Olsen P 的贡献主要是通过它们对 Ca 2 -P的间接影响。

缩写: CK:对照;NPK:氮、磷、钾肥;M1:低肥猪粪;M2:猪粪肥率高;TP:总磷;Pi:无机磷;Po:有机磷;Ca 2 -P:二钙结合磷;Ca 8 -P:八钙结合磷;Ca 10 -P:磷矿结合磷;Al-P:铝结合磷;Fe-P:铁结合磷;OP:夹杂铁/铝结合磷;LPo:不稳定有机磷;MLPo:中度不稳定的有机磷;MRPo:中抗有机磷;HRPo:高抗性有机磷;PAC:磷活化系数;SOC:土壤有机碳;TN:总氮;PCA:主成分分析。

更新日期:2020-07-14
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