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堆肥和无机肥对集约化种植的变性土团聚体中有机碳和碳循环酶活性的影响。

Effect of compost and inorganic fertilizer on organic carbon and activities of carbon cycle enzymes in aggregates of an intensively cultivated Vertisol.

机构信息

State Experimental Station of Agro-Ecosystem in Fengqiu, State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, People's Republic of China.

School of Surveying and Urban Spatial Information, Henan University of Urban Construction, Pingdingshan, People's Republic of China.

出版信息

PLoS One. 2020 Mar 12;15(3):e0229644. doi: 10.1371/journal.pone.0229644. eCollection 2020.

DOI:10.1371/journal.pone.0229644
PMID:32163434
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7067440/
Abstract

BACKGROUND AND AIMS

This paper was primarily devoted to understand the interactions of soil aggregates, organic carbon (C) and carbon cycle enzymes in aggregates under different fertilization managements, aiming to identify the effects of organic and inorganic fertilizer amendments on soil organic C accumulation and the activities of carbon cycle enzymes within aggregates in Vertisol.

METHODS

A Vertisol soil following 4-year compost and inorganic fertilizer amendments, i.e. no fertilizer (CK), mineral fertilizer (FR) and 60% compost N plus 40% fertilizer N (FRM), was collected to identify the dynamics of organic C, enzymes activities and their associations with macroaggregation using aggregate fractionation techniques.

RESULTS

The organic C content in all FR and FRM treatments was 8.24-41.15% higher than that in CK. An increased amounts of carbon cycle enzymes in aggregates or 0-20 cm bulk soil were also observed in FRM plots. Compared to FR, FRM significantly strengthened the structural stability of macroaggregates and the intimate connection between enzyme activities and macroaggregates.

CONCLUSIONS

As a recommended measure, supplementation with organic manure such as compost strengthened the process of mutual promotion between carbon cycle enzymes and macroaggregates, and the synergistic effect would be highly beneficial to soil organic C sequestration.

摘要

背景与目的

本研究主要致力于了解不同施肥管理下土壤团聚体、有机碳（C）和碳循环酶之间的相互作用，旨在确定有机和无机肥料改良对土壤有机 C 积累和团聚体中碳循环酶活性的影响。

方法

采用团聚体分级技术，采集了经过 4 年堆肥和无机肥改良的土壤（即不施肥（CK）、矿质肥（FR）和 60%堆肥氮加 40%肥料氮（FRM）），以确定有机碳、酶活性及其与大团聚体的关系的动态变化。

结果

所有 FR 和 FRM 处理的有机 C 含量均比 CK 高 8.24-41.15%。在 FRM 处理中，还观察到了团聚体或 0-20cm 表土中碳循环酶的增加。与 FR 相比，FRM 显著增强了大团聚体的结构稳定性，以及酶活性与大团聚体之间的密切联系。

结论

作为一种推荐的措施，补充堆肥等有机肥料可以加强碳循环酶与大团聚体之间的相互促进过程，这种协同效应将非常有利于土壤有机 C 的固存。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/35fb67c96e8f/pone.0229644.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/1cb9190e4b13/pone.0229644.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/543b29b99a67/pone.0229644.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/b22d02212d2d/pone.0229644.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/0aaa5ea569fc/pone.0229644.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/400b9f216826/pone.0229644.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/35fb67c96e8f/pone.0229644.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/1cb9190e4b13/pone.0229644.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/543b29b99a67/pone.0229644.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/b22d02212d2d/pone.0229644.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/0aaa5ea569fc/pone.0229644.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/400b9f216826/pone.0229644.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2278/7067440/35fb67c96e8f/pone.0229644.g006.jpg

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