鄱阳湖湿地灰化薹草洲滩土壤微生物和酶特性对水分梯度的响应

发布时间：2018-03-03 14:03

本文选题：土壤微生物　切入点：水分梯度　出处：《湿地科学》2017年02期 　论文类型：期刊论文

【摘要】：以鄱阳湖湿地灰化薹草(Carex cinerascens)洲滩表层土壤为研究材料,采用室内水分控制实验方法,设置不做任何处理的自然裸露、含水量保持在30%、放置在水面下10 cm和100 cm处4种不同水分梯度处理,土样经过42 d处理后,研究土壤微生物的生物量和土壤酶活性特征。研究结果表明,放置在水面下的土样的含水量、p H和总有机质含量都显著高于其它处理;含水量保持在30%的土样的微生物的生物量碳、氮含量分别最高,自然裸露处理下的最低;放置在水面下的土样的基础呼吸强度、乙酰氨基葡萄糖苷酶活性、磷酸酶活性、β-木糖苷酶活性、酚氧化酶活性和过氧化物酶活性都显著大于其它处理,且淹水深度对微生物的生物活性无显著影响。相关分析结果显示,影响灰化薹草洲滩表层土壤性质及其微生物和酶特性的主要因素是土壤含水量和有机质含量。
[Abstract]:The surface soil of Carex cinerascensens beach in Poyang Lake wetland was used as the research material, the indoor water control experiment method was adopted, and the natural exposed soil was set up without any treatment. The water content was kept at 30 and 4 different water gradients were placed at 10 cm and 100 cm below the water surface. After 42 days treatment, the soil microbial biomass and soil enzyme activity were studied. Soil water content and total organic matter content of soil samples placed under the water surface were significantly higher than those of other treatments, and the biomass carbon and nitrogen content of soil samples with water content kept at 30% were the highest respectively, and those of natural bare treatment were the lowest. The basic respiration intensity, acetylglucosaminidase activity, phosphatase activity, 尾 -xylosidase activity, phenoloxidase activity and peroxidase activity of soil samples placed under the water surface were significantly higher than those of other treatments. The results of correlation analysis showed that soil moisture content and organic matter content were the main factors that affected soil properties, microorganism and enzyme characteristics of surface soil of Carex ash shoal.
【作者单位】：南昌大学生命科学学院;鄱阳湖环境与资源利用教育部重点实验室;
【基金】：国家自然科学基金项目(31360127和31260110)资助
【分类号】：S154.1

【相似文献】