草业学报2016，Vol.25Issue(10)：21-30,10.DOI:10.11686/cyxb2015484
黄土高原带状植被土壤理化性质空间分异特征
The spatial differentiation of soil properties under banded vegetation systems on the Loess Plateau
摘要
Abstract
In order to explore the effects of banded vegetation on soil properties and their spatial differentiation, an analysis was carried out on the Loess Plateau of the 0-60 cm soil layers of typical banded hedgerows made up of Caragana korshinskii and Armeniaca sibirica .The results showed that:(1)There were significant spa-tial differences in soil moisture physical properties within the hedgerow systems and these also varied across the different types of hedgerow.Soil bulk density,maximum water holding capacity,non-capillary porosity and to-tal porosity varied significantly under the C.korshinskii hedgerow system (P <0.05),and soil capillary porosi-ty and non-capillary porosity varied significantly under the A.sibirica system (P <0.05).(2)Under the two types of hedgerows,there were significant differences in the contents of water-stable micro-aggregates (<0.25mm)and small aggregates (0.25 -2 mm)(P <0.05).The spatial differentiation of water-stable aggregates with particle sizes less than 2 mm was obviously affected by the hedgerows.(3 )There were no significant differences in the contents of soil sand (0.05-2 mm),silt (0.002-0.05 mm)and clay (<0.002 mm)under the two hedgerow systems,although hedgerows can change the relative composition of these three compo-nents.(4)There were differences in the content of soil organic matter under the two hedgerow systems.The content of soil organic matter was distributed as follows:for the C.korshinskii system,inner-band (3.57%, grade Ⅱ)>behind band (3.09%,grade Ⅱ)>inter-band (2.72%,grade Ⅲ)>in front of band (2.64%,gradeⅢ);for the A.sibirica system,inter-band (1.47%,grade Ⅳ)>inner-band (1.41%,grade Ⅳ).(5)Soil sand and water-stable small aggregates showed a significant positive correlation with soil organic matter (P <0.01). Silt and clay showed a significant negative correlation with soil organic matter (P <0.05).There were no sig-nificant correlations between soil organic matter and either soil bulk density,water-stable macro-aggregates or micro-aggregates.关键词
带状植被/土壤理化性质/水分物理性质/机械组成/空间分异Key words
banded vegetation/soil properties/soil moisture physical properties/mechanical composition/spa-tial differentiation引用本文复制引用
吕文强,党宏忠,王立,党汉瑾,何修道..黄土高原带状植被土壤理化性质空间分异特征[J].草业学报,2016,25(10):21-30,10.基金项目
十二五国家科技支撑计划课题“农田水土保持生物防护关键技术”（2011BAD31B02）资助。 （）
