干旱区研究

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2024 , Vol. 41 >Issue 10: 1789 - 1796

DOI: https://doi.org/10.13866/j.azr.2024.10.16

农业生态

不同土地利用方式对农田土壤有机碳组分及土壤微生物量碳的影响

  • 李娜 ,
  • 信会男 ,
  • 赖宁 ,
  • 李永福 ,
  • 吕彩霞 ,
  • 耿庆龙 ,
  • 段婧婧 ,
  • 陈署晃
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  • 新疆农业科学院土壤肥料与农业节水研究所，新疆 乌鲁木齐 830091
李娜（1992-），女，硕士，助理研究员，研究方向为农业大数据与农业遥感. E-mail: lina@xaas.ac.cn
陈署晃. E-mail: chensh66@163.com

收稿日期: 2024-01-05

  修回日期: 2024-08-06

  网络出版日期: 2024-10-14

基金资助

新疆农业科学院自主培育项目“不同土地利用方式对土壤有机碳组分及土壤微生物量碳氮的影响”(nkyzzkj-013);新疆农业科学院农业科技创新稳定支持专项课题(xjnkywdzc-2023002);中央引导地方科技发展专项资金项目(YDZX20186500001910)

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Effects of different land-use methods on the organic carbon composition and soil microbial biomass carbon of farmland soil

  • LI Na ,
  • XIN Huinan ,
  • LAI Ning ,
  • LI Yongfu ,
  • LYU Caixia ,
  • GENG Qinglong ,
  • DUAN Jingjing ,
  • CHEN Shuhuang
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  • Institute of Soil Fertilizer and Agricultural Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, Xinjiang, China

Received date: 2024-01-05

  Revised date: 2024-08-06

  Online published: 2024-10-14

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摘要

研究不同土地利用方式下农田土壤有机碳组分及微生物量碳的含量特征对指导伊犁河谷土壤资源的合理利用与管理具有重要意义。通过野外实地调查、样品采集、室内分析与地统计相结合的方法，研究伊犁河谷旱地、水浇地、水田、果园、撂荒地5种土地利用方式土壤有机碳（SOC）、颗粒有机碳（POC）、可溶性有机碳（DOC）、轻组有机碳（LFOC）、易氧化有机碳（EOC）和微生物量碳（MBC）的含量特征，比较分析土地利用变化对伊犁河谷农田土壤有机碳组分及微生物量碳的影响。结果表明：土壤TN、AN、AP和AK含量均表现为：水田>水浇地>旱地>果园>撂荒地；水田土壤养分含量显著高于其他4种土地利用方式；土壤SOC含量具有明显的差异特征，主要体现为：水田（25.62 g·kg-1）>旱地（13.80 g·kg-1）>水浇地（12.19 g·kg-1）>果园（11.58 g·kg-1）>撂荒地（8.81 g·kg-1），且均达到显著性差异水平（P<0.05）。土壤SOC、DOC、POC、LFOC、MBC含量均呈现出：水田>旱地>水浇地>果园>撂荒地的特征，其差异达到极显著水平，而EOC含量则表现为：水田>水浇地>旱地>果园>撂荒地的特征，其差异达到极显著水平。水田土壤SOC、DOC、POC、LFOC、MBC、EOC含量均显著高于其他4种利用方式。5种土地利用方式土壤SOC与POC、LFOC、DOC之间存在极显著的正相关，其相关系数分别为0.622，0.36，0.489（P<0.01)，说明土壤SOC含量是影响土壤POC、LFOC和DOC含量的重要因素。

关键词： 土地利用方式; 农田土壤; 有机碳组分; 微生物量碳; 伊犁河谷

本文引用格式

李娜 , 信会男 , 赖宁 , 李永福 , 吕彩霞 , 耿庆龙 , 段婧婧 , 陈署晃 . 不同土地利用方式对农田土壤有机碳组分及土壤微生物量碳的影响[J]. 干旱区研究, 2024 , 41(10) : 1789 -1796 . DOI: 10.13866/j.azr.2024.10.16

Abstract

Investigating the content characteristics of organic carbon components and microbial biomass carbon in farmland soil under different land-use methods is of considerable significance for guiding the rational utilization and management of soil resources in the Ili River Valley. By combining field investigations, sample collection, indoor analysis, and geostatistics, this study explored the content characteristics of soil SOC, POC, DOC, LFOC, EOC, and MBC in five land-use types, including dryland, irrigated land, paddy field, orchard, and abandoned land in the Ili River Valley. This study compared and analyzed the effects of land-use changes on soil organic carbon components and microbial biomass carbon in farmland in the Ili River Valley. Results showed that the contents of TN, AN, AP, and AK in soil were in the order of paddy field>irrigated land>dryland>orchard>fallow land. The nutrient content of paddy soil was significantly higher than that of the other four land-use types. The soil SOC content showed significant differences, primarily reflected in paddy fields (25.62 g·kg-1)>dryland (13.80 g·kg-1)>irrigated land (12.19 g·kg-1)>orchards (11.58 g·kg-1)>abandoned land (8.81 g·kg-1), and all reached a significant difference level (P<0.05). The contents of soil SOC, DOC, POC, LFOC, and MBC showed the characteristics of paddy field>dryland>irrigated land>orchard>abandoned land, with significant differences. The EOC content showed the characteristics of paddy field>irrigated land>dryland>orchard>abandoned land, with significant differences. The contents of SOC, DOC, POC, LFOC, MBC, and EOC in paddy soil were significantly higher than those in the other four land-use types. A highly significant positive correlation was detected between soil SOC and POC, LFOC, and DOC in the five land-use types, with the correlation coefficients being 0.622, 0.36, and 0.489, respectively (P<0.01), indicating that soil SOC content is an important factor affecting soil particulate organic carbon, light organic carbon, and soluble organic carbon contents.

Key words： land use mode; farmland soil; organic carbon fraction; microbial biomass carbon; Ili River Valley

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