生态学杂志2011，Vol.30Issue(11)：2432-2436,5.
红砂灌丛对土壤和草本植物特征的影响
Effects of Reaumuria soongorica on its underlying soil properties and herb plant characteristics
摘要
Abstract
This paper studied the differences of soil moisture and nutrients under shrub canopy and in open space as well as the effects of Reaumuria soongorica during its germination on the herb growth and vegetation composition in desert grassland of western Loess Plateau. Under shrub canopy, the soil water regime, especially in 30-110 cm layer, was better, and the soil silt and clay contents, especially in 0-10 cm layer, were much higher while the soil sand content was lower, as compared with those in open space. The soil organic matter, total N, P, and K, and available N, P, and K were more enriched under shrub canopy, with the enrichment rate being 1.40, 1.25, 1.04, 1.05, 1.37, 1.77, and 1.49, respectively. From shrub canopy to open space, the herb plant coverage and height decreased, while the species richness increased. The relative interactive intensity of R. Soongorica to herb plants density, coverage, and height were positive , whereas to herb plants species richness was negative. These results suggested that shrub R. Soongorica had obvious "fertile island" effect, and had promotion effect on the growth of underlying herb plants.关键词
灌木/红砂/草本植物/土壤性状Key words
shrub/ Reaumuria soongorica/ herb plant/ soil property.分类
农业科技引用本文复制引用
何玉惠,刘新平,谢忠奎..红砂灌丛对土壤和草本植物特征的影响[J].生态学杂志,2011,30(11):2432-2436,5.基金项目
国家自然科学基金项目(40801036)、中国科学院寒区旱区环境与工程研究所青年人才基金项目(51Y084951)、中国科学院西部之光西部博士项目(0928641001)和中国科学院方向性项目(KSCX2-EW-B-1-4)资助. （40801036）
