绿肥覆盖对果园土壤团聚体及有机碳组分的影响

doi:10.13287/j.1001-9332.202412.012

应用生态学报 ›› 2024, Vol. 35 ›› Issue (12): 3427-3434.doi: 10.13287/j.1001-9332.202412.012

绿肥覆盖对果园土壤团聚体及有机碳组分的影响

闫桂菀¹, 董文斌^2,3, 李忠义^2,3, 韦彩会^2,3, 唐红琴^2,3, 邓羽松¹, 张宇亭⁴, 何铁光^2,3*

¹广西大学林学院, 南宁 530004;
²广西农业科学院农业资源与环境研究所, 南宁 530007;
³广西耕地保育重点实验室, 南宁 530007;
⁴西南大学资源环境学院, 重庆 400715

收稿日期:2024-05-08 接受日期:2024-10-10 出版日期:2024-12-18 发布日期:2025-06-18
通讯作者: *E-mail: tghe118@163.com
作者简介:闫桂菀, 女, 2001年生, 硕士研究生。主要从事土壤养分、土壤侵蚀研究。E-mail:wandeline0322@outlook.com
基金资助:
国家绿肥产业技术体系建设项目(CARS-22)、科技先锋队“强农富民”“六个一”专项行动(桂农科盟202413)和广西农业科学院基本科研业务专项(桂农科2021YT037)

Effects of green manure mulching on soil aggregates and organic carbon fractions in orchards

YAN Guiwan¹, DONG Wenbin^2,3, LI Zhongyi^2,3, WEI Caihui^2,3, TANG Hongqin^2,3, DENG Yusong¹, ZHANG Yuting⁴, HE Tieguang^2,3*

¹College of Forestry, Guangxi University, Nanning 530004, China;
²Institute of Agricultural Resources and Environment, Guangxi Academy of Agricultural Sciences, Nanning 530007, China;
³Guangxi Key Laboratory of Arable Land Conservation, Nanning 530007, China;
⁴College of Resources and Environment, Southwest University, Chongqing 400715, China

Received:2024-05-08 Accepted:2024-10-10 Online:2024-12-18 Published:2025-06-18

摘要/Abstract

摘要： 绿肥覆盖是果园可持续发展的土壤管理模式。本研究设置光叶苕子(T₁)、肥田萝卜(T₂)、平托花生(T₃)以及光叶苕子、肥田萝卜和宽叶雀稗混播(T₄)4个绿肥处理,以清耕为对照,测定不同绿肥覆盖对柑橘果园土壤团聚体及有机碳组分的影响。结果表明:1)与清耕相比,绿肥覆盖显著改善了果园土壤团聚体分布和稳定性,其中T₁～T₄处理＞2 mm粒径大团聚体分别提高了10.7%、6.6%、11.1%和9.3%,团聚体平均重量直径提高了1.1～1.3倍;2)绿肥覆盖显著提高了土壤总有机碳(TOC)含量及其组分,其中,TOC提高了2.5%～31.7%,溶解有机碳、颗粒有机碳、矿物结合有机碳、易氧化有机碳含量分别提高了23.7%～97.9%、38.2%～118.3%、2.8%～35.5%、8.6%～49.5%;3)相关性分析表明,各粒径团聚体占比与其有机碳组分含量贡献相关,＞2 mm粒径团聚体是TOC及其组分的主要载体,团聚体稳定性与TOC显著相关。综上,绿肥覆盖显著提高了柑橘果园土壤中大团聚体的含量,提升了土壤团聚体的稳定性,改善了土壤团粒结构,增加了土壤有机碳含量,不同类型绿肥覆盖的效果各异,其中以光叶苕子和平托花生的改良效果最佳。

关键词: 绿肥覆盖, 果园, 有机碳组分, 土壤团聚体

Abstract: Green manure mulching is a sustainable soil management model for orchards. We conducted an experiment with four different green manure treatments, Vicia villosa (T₁), Arachis pintoi (T₂), Raphanus sativus (T₃), and a mixed sowing of V. villosa, R. sativus and P. wetsfeteinii (T₄), with clear tillage as control, to investigate the effects of green manure mulching on soil aggregates and organic carbon fractions in a citrus orchard. The results showed that: 1) Green manure mulching significantly enhanced the distribution and stability of soil aggregates. The proportion of large aggregates (>2 mm) increased by 10.7%, 6.6%, 11.1%, and 9.3% for the T₁-T₄ treatments, respectively, while the mean weight diameter of the aggregates increased by 1.1 to 1.3 times. 2) Mulching significantly improved total organic carbon (TOC) content and its fractions. TOC was increased by 2.5% to 31.7%, while dissolved organic carbon, particulate organic carbon, mineral-bound organic carbon, and easily oxidizable organic carbon was increased by 23.7%-97.9%, 38.2%-118.3%, 2.8%-35.5%, and 8.6%-49.5%, respectively. 3) The proportion of aggregates of each particle size correlated with its contribution to the organic carbon fractions. Aggregates greater than 2 mm were the primary carriers of TOC and its fractions. Additionally, the stability of these aggregates was significantly correlated with TOC. In summary, green manure mulching markedly increased the content of large aggregates, enhanced the stability of soil aggregates, improved granular soil structure, and increased organic carbon content in citrus orchard soil. Notably, the effects varied among treatments, with V. villosa and A. pintoi having the most effective amelioration.

Key words: green manure mulching, orchard, organic carbon fraction, soil aggregate

闫桂菀, 董文斌, 李忠义, 韦彩会, 唐红琴, 邓羽松, 张宇亭, 何铁光. 绿肥覆盖对果园土壤团聚体及有机碳组分的影响[J]. 应用生态学报, 2024, 35(12): 3427-3434.

YAN Guiwan, DONG Wenbin, LI Zhongyi, WEI Caihui, TANG Hongqin, DENG Yusong, ZHANG Yuting, HE Tieguang. Effects of green manure mulching on soil aggregates and organic carbon fractions in orchards[J]. Chinese Journal of Applied Ecology, 2024, 35(12): 3427-3434.

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绿肥覆盖对果园土壤团聚体及有机碳组分的影响

Effects of green manure mulching on soil aggregates and organic carbon fractions in orchards

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