干旱地区农业研究2009，Vol.27Issue(4)：155-162,8.
红砂植被盖度对土壤不同形态碳、氮及细菌多样性的影响
Effects of different plant cover of Reaumuria soongorica on soil carbon and nitrogen in different variety and soil bacterial diversity
摘要
Abstract
Soil quality restoration and soil management is the key for vegetation restorat ion and eco-environment sustainable development for the hilly region of the sem iarid Loess Plateau. In order to provide scientific reference for vegetation res toration and soil care in the Loess Plateau, the change of soil carbon and nitro gen in different variety and soil bacterial diversity was studied by designing f ive gradient levels of plant cover of Reaumuria soongorica at Lanzhou Experi ment Base of Environmental Afforestation of South-North Mountains. The results show ed: soil organic carbon (SOC), total nitrogen (TN), soil microbial biomass C (MB C) and microbial biomass N (MBN) gradually increased with vegetation cover,SOC, TN, MBC and MBN increased quickly before the vegetation cover approaching 48.73 %. There were similar trend between soil microbial biomass (MBC and MBN) and nut rients (SOC and TN) under the same vegetation cover, which indicted that the org anic fertilizer could provide energy for the growth of microbe. Soil bacterial d iversity increased with vegetation cover, and then gradually remained at a quite constant level, although soil microbial community's structure was different fro m each other under different vegetation cover. It implies that in arid and semia rid areas with sparse vegetation and lower plant diversity, the increase of the vegetation cover of Reaumuria soongorica changed obviously the ecological fu ncti on of the soil. However, the unilateral increase of vegetation cover will have l ess effect to the soil properties.关键词
红砂/植被盖度/土壤微生物量/细菌多样性/PCR-DGGEKey words
Reaumuria soongorica/plant cover/microbial biom ass/soil bacterial diversity/PCR-DGGE分类
农业科技引用本文复制引用
刘秉儒..红砂植被盖度对土壤不同形态碳、氮及细菌多样性的影响[J].干旱地区农业研究,2009,27(4):155-162,8.基金项目
宁夏大学自然科学基金(ZR200833) （ZR200833）
