Microscale Heterogeneous Distribution and Speciation of Phosphorus in Soils Amended with Mineral Fertilizer and Cattle Manure Compost
| Autor: | Paul Northrup, Yohey Hashimoto, Dean Hesterberg, Masahiro Kasuya, Shan-Li Wang, Taku Yamamoto, Aomi Suda, Noriko Yamaguchi, Kaori Ando, Atsuko Hikono, Toshiaki Ohkura |
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| Rok vydání: | 2021 |
| Předmět: |
compost
lcsh:QE351-399.2 Soil test media_common.quotation_subject Amendment chemistry.chemical_element 010501 environmental sciences engineering.material 01 natural sciences soil sequential extraction phosphorus 0105 earth and related environmental sciences media_common lcsh:Mineralogy Chemistry Compost Phosphorus Geology 04 agricultural and veterinary sciences Geotechnical Engineering and Engineering Geology microenvironment Manure NMR XANES Speciation speciation Environmental chemistry Soil water 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries EPMA Fertilizer |
| Zdroj: | Minerals Volume 11 Issue 2 Minerals, Vol 11, Iss 121, p 121 (2021) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min11020121 |
| Popis: | Global concerns for the sustainability of agriculture have emphasized the need to reduce the use of mineral fertilizer. Although phosphorus (P) is accumulated in farmland soils due to the long-term application of fertilizer, most soil P is not readily available to plants. The chemical speciation of P in soils, which comprise heterogeneous microenvironments, cannot be evaluated with a high degree of specificity using only macroscopic analyses. In this study, we investigated the distribution and speciation of P accumulated in soils by using both macro- and microscopic techniques including chemical extraction, solution and solid-state 31P NMR, bulk- and micro- P K-edge X-ray absorption near edge structure (XANES), and electron probe microanalysis (EPMA). Soil samples were collected from a field in which cabbage was cultivated under three amendment treatments: i) mineral fertilizer (NPK), ii) mineral fertilizer and compost (NPK + compost), and iii) mineral fertilizer plus compost but without nitrogen fertilizer (PK + compost). Macro-scale analyses suggested that accumulated P was predominantly inorganic P and associated with Al-bearing minerals. The repeated application of compost to the soils increased the proportion of P associated with Ca which accounted for 17% in the NPK + compost plot and 40% in the PK + compost plot. At the microscale, hot spots of P were heterogeneously distributed, and P was associated with Fe and Ca in hot spots of the NPK + compost (pH 6) and PK + compost (pH 7) treated samples, respectively. Our results indicate that application of compost contributed to creating diverse microenvironments hosting P in these soils. |
| Databáze: | OpenAIRE |
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