首页 | 本学科首页   官方微博 | 高级检索  
     检索      

土壤压实指标在城市土壤评价中的应用与比较
引用本文:杨金玲,张甘霖,赵玉国,阮心玲,何跃.土壤压实指标在城市土壤评价中的应用与比较[J].农业工程学报,2005,21(5):51-55.
作者姓名:杨金玲  张甘霖  赵玉国  阮心玲  何跃
作者单位:中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京,210008
基金项目:国家自然科学基金重点项目(40235054);中国科学院知识创新工程项目(KZCX3-SW-427)资助
摘    要:通过测定南京市不同土地利用下的52个样点的紧实度、容重和孔隙度3个压实指标来反映城市土壤的压实程度。结果表明,南京市大多数土壤存在不同程度的压实,部分压实严重,可能限制植物的生长。不同压实指标在反映土壤压实程度上基本一致,它们之间具有极显著的相关性,可以相互转换。但紧实度指标受到土壤含水量的显著影响。在同一质地或质地相近的土壤,容重和孔隙度可以很好地反映土壤的压实程度。与总孔隙度和毛管孔隙度相比,通气孔隙度在反映土壤压实时更为敏感。所以在进行城市土壤压实状况评价时,可以选择不同的土壤压实程度指标,但就方法的实用性和可靠性来说,容重比紧实度和孔隙度指标一般更方便可靠。

关 键 词:城市土壤    压实指标    紧实度    容重    孔隙度
文章编号:1002-6819(2005)05-0051-05
收稿时间:2004/11/9 0:00:00
修稿时间:2004年11月9日

Application and comparison of soil compaction indexes in the evaluation of urban soils
Yang Jinling,Zhang Ganlin,Zhao Yuguo,Ruan Xinling and He Yue.Application and comparison of soil compaction indexes in the evaluation of urban soils[J].Transactions of the Chinese Society of Agricultural Engineering,2005,21(5):51-55.
Authors:Yang Jinling  Zhang Ganlin  Zhao Yuguo  Ruan Xinling and He Yue
Abstract:Compaction is ubiquitous in urban soil. This study evaluated urban soil compaction degree by comparing three compaction indexes, i.e., direct compaction measurement (DCM), bulk density (Bd) and porosity (Pr) of 52 soil samples in different land uses in Nanjing City. The results showed that most of the soils in the Nanjing City were compacted, and a high portion of them was severely compacted, which might restrict plant growth. DCM, Bd and Pr were consistent in expressing compaction degree and they had significant relationships, so they could substitute one another. It should be noted that soil water content must be considered when using DCM as a compaction index because water content affects DCM value significantly, which limits the application of DCM. Bd and Pr are affected by texture and organic matter content, but they are good indexes of soil compaction degree when soil texture is similar. Aeration porosity is more sensitive than total and capillary porosity to reflect soil compaction degree. Therefore, different compaction indexes can be used in estimating soil compaction, but Bd is often easier and more reliable than DCM and Pr.
Keywords:urban soil  compaction index  compaction  bulk density  porosity
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《农业工程学报》浏览原始摘要信息
点击此处可从《农业工程学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号