首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
免耕对农田土壤团聚体的影响研究:Meta分析
摘要点击 1233  全文点击 191  投稿时间:2023-03-16  修订日期:2023-05-04
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  免耕  土壤团聚体  平均重量直径(MWD)  团聚体有机碳  Meta分析
英文关键词  no-tillage  soil aggregates  mean weight diameter (MWD)  aggregate-associated SOC  Meta analysis
作者单位E-mail
徐艺萍 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100
中国农业大学农学院, 北京 100193 
xuyiping9703@163.com 
饶越悦 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100
中国农业大学农学院, 北京 100193 
 
孟艳 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100  
温媛 中国农业大学农学院, 北京 100193  
孟维伟 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100  
王旭清 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100  
李宗新 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100  
刘开昌 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100 liukc1971@126.com 
代红翠 山东省农业科学院小麦玉米国家工程研究中心, 济南 250100 daihongcui2013@163.com 
中文摘要
      为明确免耕对农田土壤团聚体的影响,通过Meta分析整合已发表的116项研究,综合探究免耕对土壤团聚体粒径分布、平均重量直径(MWD)以及团聚体有机碳含量的影响.结果表明,与耕作相比,免耕显著提高土壤大团聚体占比(10.9%)和MWD(12.8%),减少黏粉粒占比(-15.5%),但对微团聚体及团聚体有机碳含量没有显著影响.亚组分析表明,免耕显著提高西北地区土壤大团聚体占比(17.6%),提高华北地区土壤团聚体MWD(15.4%);在旱地及黏壤土中,免耕分别提高团聚体MWD效应值12.6%和18.4%;免耕提高大团聚体占比的效果随土壤pH值增加而增加;秸秆还田条件下,免耕显著提高土壤大团聚体占比(9.6%)及MWD(11.6%),秸秆移除后,免耕对团聚体的影响效应均不显著;在试验年限方面,短期免耕(< 5 a)显著提高土壤大团聚体比例,而长期免耕(> 10 a)提高团聚体MWD;在土壤深度方面,免耕仅能改善耕层(0~20 cm)土壤团聚体粒径分布及MWD,而对深层土壤(> 20 cm)团聚体没有影响.综上所述,免耕能够改善土壤团聚体粒径分布及稳定性,但对团聚体碳含量无显著影响.在实际生产中,要充分考虑生产区域、土壤性质和田间管理等因素,以达到有效改良土壤团聚体的目的.
英文摘要
      In order to clarify the impact of no-tillage on the quality of farmland soil aggregates in China and promote the adaptive application of no-tillage practices, a Meta-analysis was conducted by collecting data from 116 published studies. The effects of no-tillage on aggregate size distribution, mean weight diameter (MWD), and aggregate-associated C were studied. The results showed that compared with that under tillage, no-tillage significantly increased the proportion of macroaggregates (10.9%) and MWD (12.8%) and decreased the proportion of clay and silt (-15.5%) but had no significant effect on soil microaggregate and aggregate-associated C. The subgroup and Meta regression analysis showed that no-tillage significantly increased the proportion of macroaggregates in Northwest China (17.6%) and MWD in North China (15.4%). In upland and clay loam, no-tillage increased MWD by 12.6% and 18.4%, respectively. The effect of no-tillage on increasing the proportion of macroaggregates increased with the soil pH. When straw returned, no-tillage significantly increased the proportion of macroaggregates (9.6%) and MWD (11.6%), but no significant effect of no-tillage on aggregates was found after straw removal. Regarding test duration, short-term ( < 5 a) no-tillage could significantly increase the proportion of macroaggregates, whereas long-term ( > 10 a) no-tillage could improve the MWD. In different soil layers, no-tillage could only significantly improve the aggregate size distribution and MWD in topsoil (0-20 cm) but had no effect in subsoil ( > 20 cm). In summary, no-tillage could improve aggregate size distribution and stability but had no effect on aggregate-associated C. Production region, soil properties, field management methods, and other factors should be fully considered in production practice to effectively improve the quality of soil aggregates.

您是第53545794位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2