土壤2017，Vol.49Issue(1)：184-188,5.DOI:10.13758/j.cnki.tr.2017.01.027
基于CT的青海湖流域芨芨草草地土壤大孔隙特征分析
Soil Macropore Characteristics ofAchnatherum splendens Steppe in the Qinghai Lake Watershed
摘要
Abstract
Soil macropore characteristics ofAchnatherum splendens Steppe in the Qinghai Lake Watershed of northeastern Qinghai-Tibet Plateau by using computed tomography (CT) was quantified. A plot within aAchnatherum splendens patch and a plot outside aAchnatherum splendens patch were selected, and 3 soil cores (0 – 50 cm deep) were taken as replicates from each plot and scanned with a GE HISPEED FX/I medical scanner. The results indicated that the number of macropores and the macroporosity of soil within theAchnatherum splendens patch were larger than those of soil outside the patch, the mean numbers of macropore and macroporosity of soil within theAchnatherum splendens patch were 2.8 times and 12.1 times greater than those in soil outside the patch. With the increase of soil depth, the macroporosity increased first and then decreased within the Achnatherum splendens patch, while it decreased continuously in soil outside the patch.关键词
青海湖流域/芨芨草/CT/土壤大孔隙Key words
Achnatherum splendens/CT/Soil macropores分类
农业科技引用本文复制引用
刘勇,胡霞,李宗超,孙贞婷,程亚倩,吕艳丽..基于CT的青海湖流域芨芨草草地土壤大孔隙特征分析[J].土壤,2017,49(1):184-188,5.基金项目
国家自然科学基金项目(41471018)和国家自然科学基金重点项目(41130640)资助. （41471018）
