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选择黄土高原7种典型植物的根际与非根际土壤为研究对象,对土壤的养分含量、微生物生物量碳、氮、磷和基础呼吸的影响进行了初步研究。结果表明,7种不同植物根际土壤与非根际土壤的养分含量、微生物生物量和基础呼吸均存在显著差异;除冷蒿的土壤微生物生物量磷以外,其他各种植物的根际土壤的养分含量、微生物生物量和基础呼吸均比非根际土壤的高;土壤有机碳、全氮与土壤微生物生物量碳、氮及基础呼吸之间均具有极显著或显著相关关系,表明了土壤微生物生物量碳、氮可以作为判断土壤肥力状况的生物学指标,同时也可为提高土壤肥力水平和土壤培肥效果提供依据。
The rhizosphere and non-rhizosphere soils of seven typical plant species in the Loess Plateau were selected to study the effects of soil nutrient content, microbial biomass carbon, nitrogen, phosphorus and basic respiration. The results showed that the nutrient contents, microbial biomass and basic respiration of rhizosphere soil and non-rhizosphere soil of seven different plants were significantly different. In addition to soil microbial biomass phosphorus of Artemisia frigida, the content of rhizosphere soil Soil nutrient content, microbial biomass and basic respiration were higher than those in non-rhizosphere soil. There was a significant or significant correlation between soil organic carbon and total nitrogen and soil microbial biomass carbon, nitrogen and basal respiration, indicating that soil microorganisms Biomass carbon and nitrogen can be used as biological indicators to judge soil fertility status, and provide basis for improving soil fertility and soil fertility.