两种不同水稻秸秆循环利用系统2年土壤团聚体变化特征

IF 2.3 4区农林科学 Q1 AGRONOMY

Archives of Agronomy and Soil Science Pub Date : 2023-03-30 DOI:10.1080/03650340.2023.2196618

Wenqi Gu, Weiming Zhang, Liqun Xiu, Yuanyuan Sun, Di Wu, Yuning Wang, Honggui Zhang, H. Yuan, Zhibo Feng, J. Meng, Wenfu Chen

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引用次数: 0

摘要

土壤团聚体对土壤质量具有重要影响。秸秆还田有利于土壤修复，但秸秆及其生物炭对水稻土团聚体形成和稳定性的影响尚不清楚。本研究在东北地区进行了为期2年的田间试验，采用常规施肥(CF)、秸秆施肥(ST, 7.5 t / h−1年−1)、生物炭施肥(BC, 2.5 t / h−1年−1)和生物炭基肥料(BCF, 0.75 t / h−1年−1)4种处理。与CF和BCF相比，BC和ST改善了大团聚体，显著增加了土壤总碳和团聚体有机碳，表明对团聚体的形成和稳定具有持续的积极作用。BC显著提高了骨料稳定性。相关分析表明，增加重馏分有机碳(HFOC)可以增加大团聚体(2 ~ 0.25 mm)， BC和ST显著增加了HFOC, BC的作用更大。扫描电镜(SEM)结果表明，强力水冲刷可以捕获生物炭与土壤颗粒的结合。土壤团聚体的形成和稳定性呈增加趋势。相比之下，生物炭对促进大团聚体形成和土壤团聚体稳定性的作用更大，且具有显著的可持续效应。

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Soil aggregate variation in two contrasting rice straw recycling systems for paddy soil amendment over two years

ABSTRACT Soil aggregate is important to soil quality. Straw return is beneficial for soil amendment, but the effects of straw and straw-derived biochar on aggregate formation and stability in paddy soil are unclear. This study carried out a field experiment for 2 years in Northeast China with four treatments: conventional fertilization (CF), straw (ST, 7.5 t ha−1 year−1), biochar (BC, 2.5 t ha−1 year−1), and biochar-based fertilizer (BCF, 0.75 t ha−1 year−1). Compared with the CF and BCF, BC and ST improved the macroaggregates and significantly increased soil total carbon and aggregate organic carbon, indicating a sustained positive role in promoting the formation and stability of aggregates. BC significantly improved aggregate stability. Correlation analysis showed that macroaggregates (2–0.25 mm) can be increased by increasing the heavy fraction organic carbon (HFOC), BC and ST significantly increased the HFOC, and BC had a greater effect. Scanning electron microscopy (SEM) showed that the combination of biochar and soil particles can be captured with strong water scouring. BCF showed an increasing trend in the formation and stability of soil aggregates. In comparison, biochar had a greater effect on promoting the formation of macroaggregates and the stability of soil aggregates with a significant sustainable effect.

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来源期刊

Archives of Agronomy and Soil Science AGRONOMY-SOIL SCIENCE

CiteScore

5.50

自引率

4.20%

发文量

107

期刊介绍： rchives of Agronomy and Soil Science is a well-established journal that has been in publication for over fifty years. The Journal publishes papers over the entire range of agronomy and soil science. Manuscripts involved in developing and testing hypotheses to understand casual relationships in the following areas: plant nutrition fertilizers manure soil tillage soil biotechnology and ecophysiology amelioration irrigation and drainage plant production on arable and grass land agroclimatology landscape formation and environmental management in rural regions management of natural and created wetland ecosystems bio-geochemical processes soil-plant-microbe interactions and rhizosphere processes soil morphology, classification, monitoring, heterogeneity and scales reuse of waste waters and biosolids of agri-industrial origin in soil are especially encouraged. As well as original contributions, the Journal also publishes current reviews.