Soil nutrients, phosphatase activities and phosphorus species distribution in soils amended sheep manure biochar

IF 2.8 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Journal of Soils and Sediments Pub Date : 2024-07-24 DOI:10.1007/s11368-024-03869-9
Seyed Hamid Hosseini, Xinqiang Liang, Christophe Niyungeko, Seyedeh Fatemeh Zakeritabar
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Abstract

Purpose

Sheep manure-derived biochar (SMB) is applied to enhance soil productivity, but its impacts on soil phosphorus (P) species distribution have not been thoroughly investigated. This research aimed to explore the effects of SMB amended soil on phosphatase activities, nutrients, P species distribution, and the underlying mechanisms in agricultural soil.

Materials and methods

The soils (collected from rice and tea cultivation) were incubated for a period of 92 days receiving different rates of biochars 0% (CK), 2% (T1) and 4% (T2) respectively. The SMB was manufactured at 500°C, and P species were tested via 31P NMR spectroscopy. Acid phosphomonoesterase (ACP) activities, CEC, NH4+–N, pH, NO3–N, Olsen‒ P and alkaline phosphomonoesterase (ALP) were determined.

Results and discussion

The findings suggested that the SMB addition enhanced the pH, NO3–N, Olsen‒ P, CEC, NH4+–N contents in both paddy and tea soils. Furthermore, compared with CK (control), application of SMB at T2 reduced the ACP activities by 85.9 and 74.8%, but promoted the ALP activities by 89.1 and 70.6% for paddy and tea soils, respectively. The findings showed that major forms of P were orthophosphate and orthophosphate monoesters.

Conclusions

The SMB application increased soil inorganic P, P availability and ALP activities as a result of increasing of P availability by decomposition of organic P. Our research showed that the SMB application is an alternative nutrient for plants instead of chemical fertilizers. Nevertheless, care should be taken with the long-term SMB application, consequently excessive nutrient utilization has the potential to induce eutrophication in aquatic environments.

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羊粪生物炭改良土壤中的土壤养分、磷酸酶活性和磷的种类分布
目的应用羊粪衍生生物炭(SMB)可提高土壤生产力,但其对土壤磷(P)种类分布的影响尚未得到深入研究。本研究旨在探讨 SMB 改良土壤对农用土壤中磷酸酶活性、养分、磷种类分布的影响及其内在机制。在 500°C 的温度下制造 SMB,并通过 31P NMR 光谱检测 P 的种类。结果与讨论结果表明,添加 SMB 后,水稻土和茶叶土中的 pH 值、NO3-‾-N、Olsen- P、CEC、NH4+-N 含量均有所提高。此外,与 CK(对照)相比,在 T2 施用 SMB 会使水稻土和茶叶土的 ACP 活性分别降低 85.9% 和 74.8%,但会使 ALP 活性分别提高 89.1% 和 70.6%。我们的研究表明,施用 SMB 是替代化肥的一种植物养分。不过,长期施用 SMB 应谨慎小心,因为养分的过度利用有可能导致水生环境富营养化。
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来源期刊
Journal of Soils and Sediments
Journal of Soils and Sediments 环境科学-土壤科学
CiteScore
7.00
自引率
5.60%
发文量
256
审稿时长
3.5 months
期刊介绍: The Journal of Soils and Sediments (JSS) is devoted to soils and sediments; it deals with contaminated, intact and disturbed soils and sediments. JSS explores both the common aspects and the differences between these two environmental compartments. Inter-linkages at the catchment scale and with the Earth’s system (inter-compartment) are an important topic in JSS. The range of research coverage includes the effects of disturbances and contamination; research, strategies and technologies for prediction, prevention, and protection; identification and characterization; treatment, remediation and reuse; risk assessment and management; creation and implementation of quality standards; international regulation and legislation.
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