Enhanced phosphorus mobility in a calcareous soil with organic amendments additions: Insights from a long term study with equal phosphorus input
文献类型： 外文期刊
作者： Zhang, Shuai 1 ; Wang, Liying 2 ; Chen, Shuo 1 ; Fan, Bingqian 3 ; Huang, Shaowen 4 ; Chen, Qing 1 ;
作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent Cont, 2 Yuanmingyuan Xilu, Beijing 100193, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Shijiazhuang 050051, Hebei, Peoples R China
3.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Nonpoint Source Pollut Control, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
4.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Plant Nutr & Fertilizer, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
关键词： P transformation; P transport;
Sorption/desorption
; Iron oxide; Spectroscopy; Long -term fertilization期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.91； 五年影响因子：8.549 ）
ISSN： 0301-4797
年卷期： 2022 年 306 卷
页码：
收录情况： SCI
摘要： The agricultural practice of replacing chemical fertilizers with organic amendments (manure and/or straw) may have consequences for phosphorus (P) loss to the environment. Such a knowledge gap was examined using a ten-year field trial in calcareous soil containing four treatments with the equal annual P input but varied organic amendment combinations as follows: mineral fertilizer only as control (MF), mineral fertilizer coupled with manure (MM), mineral fertilizer coupled with manure and straw (MMS) and mineral fertilizer coupled with straw (MS). The soil P distribution, P fractions and speciation, Fe(III) reduction and P sorption kinetics were investigated using the chemical extraction, K edge X-ray absorption near-edge structure and Langmuir equations. The electronic shuttle capacity of soils and speciation of soil dissolved organic matter (DOM) were also evaluated using electrochemical methods, three-dimensional excitation-emission matrix fluorescence spectroscopy and Fourier transform infrared spectra methods. Results showed that soil Olsen-P and total P increased at depths of 20-40 cm in MM, MMS and MS treatments, suggesting that manure and/or straw addition significantly mobilized P in the soil profile. Manure and/or straw addition also decreased soil maximum P sorption capacity (S-max) and increased the desorption rate at depths of 0-20 cm in soil across treatments. At a depth of 0-20 cm in soil of the MS treatment, the enhanced Fe(III) reduction coupled with a decrease of Fe-bound P supports that Fe reduction dominates the mobilization of P. The transformation of Ca bound-P to Al/Fe bound-P in a depth of 0-20 cm in soil of the MM treatment may be due to the high proportion of humic-like substances in the DOM at a depth of 0-20 cm in soil of the MM treatment, which may have caused a slight/microsite acidification. These results can help to develop optimized fertilization practices to effectively mitigate P loss from calcareous soils with manure and/or straw addition.
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