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首页 > 过刊浏览>2022年第14卷第1期 >50-61. DOI:10.13878/j.cnki.jnuist.2022.01.006
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奶牛粪沼液对小麦-玉米轮作土壤团聚体有机碳组分的影响
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中图分类号:

S153.6

基金项目:

国家自然科学基金(21577052);江苏省农业自主创新资金(CX (20)1011)


Effects of digested dairy slurry application on soil aggregates and their organic carbon composition in wheat and maize rotation system
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    摘要:

    为探明奶牛粪沼液连续施用对耕层土壤团聚体及有机碳活性的影响,本研究以小麦-玉米轮作体系为研究对象,进行了2年奶牛粪沼液连续施用的田间小区试验,分析了沼液施用后表层(0~10 cm)和亚表层(10~20 cm)土壤水稳性团聚体及其总有机碳与各活性组分含量的变化特征.研究发现:施用沼液后土壤团聚体稳定性显著(P<0.05)增加,土壤小团聚体有向大团聚体演化的趋势,且沼液施用量越大,耕层土壤中大团聚体增加越多;施用沼液后耕层土壤碳库存分别比施用化肥的处理增加25.9%~35.2%,高活性有机碳的变化对土壤碳库的影响最大;施用沼液会通过活性碳的输入提升耕层土壤碳库活度,且亚表层土壤碳库活度对外源有机物的输入更加敏感,大团聚体中活性较高有机碳增加是主要驱动因子.

    Abstract:

    The organic carbon in soil aggregates plays an important role in the dynamic balance of soil carbon pool.In order to explore the impacts of digested dairy slurry application on soil aggregates and their organic carbon composition,this study was carried out in a wheat and maize rotation system applied with digested dairy slurry for two years.The characteristics of soil aggregates and their total organic carbon and compositions in soil layer of 0-10 cm and 10-20 cm were studied after harvest.The results were that the stability of soil aggregates increased significantly (P<0.05) after the digested dairy slurry application.The digested dairy manure was beneficial to the improvement of macro aggregates.Meanwhile,this trend was more obvious with the increase of the amount of digested dairy slurry.The soil carbon stock in the treatment of digested dairy slurry application increased by 25.9%-35.2% compared with that in treatments of chemical fertilizer application.The changes of soil carbon stock were mainly due to high-activity organic carbon.The soil carbon pool activity was improved due to the input of labile carbon in the digested dairy slurry.In addition,the soil carbon pool activity in the soil layer of 10-20 cm was more sensitive to the input of additive organic matters.The highly active organic carbon in the macro aggregates was the main drive factor.This study could provide scientific support for the reasonable application of digestates for the improvement of carbon sequestration potential from the farmland ecosystems.

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陈皓,娄梦函,徐轩,靳红梅,朱宁,杨月.奶牛粪沼液对小麦-玉米轮作土壤团聚体有机碳组分的影响[J].南京信息工程大学学报(自然科学版),2022,14(1):50-61
CHEN Hao, LOU Menghan, XU Xuan, JIN Hongmei, ZHU Ning, YANG Yue. Effects of digested dairy slurry application on soil aggregates and their organic carbon composition in wheat and maize rotation system[J]. Journal of Nanjing University of Information Science & Technology, 2022,14(1):50-61

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  • 收稿日期:2021-09-20
  • 在线发布日期: 2022-04-11

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