尕海湿地沼泽化草甸中不同积水区土壤活性有机碳含量

发布时间：2018-06-13 19:54

本文选题：积水状况 + 沼泽化草甸　；参考：《湿地科学》2017年01期

【摘要】：2014年5~9月,以尕海湿地沼泽化草甸中不同积水区(无积水区、季节性积水区和常年积水区)的土壤为研究对象,测定土壤中的活性有机碳含量,分析沼泽化草甸不同积水区土壤活性有机碳组分差异。研究结果表明,积水状况对土壤活性有机碳组分影响显著。0~40 cm深度土壤活性有机碳含量最大值出现在常年积水区,季节性积水区的土壤活性有机碳含量次之,最小值出现在无积水区。在不同土壤深度,20~40 cm深度土壤有机碳和微生物量碳含量在季节性积水区最大,在无积水区最小,其它深度土壤有机碳、微生物量碳和易氧化有机碳含量都在常年积水区最大,在无积水区最小,说明常年积水区活性有机碳及组分具有更加明显的表聚性。在不同采样日,各积水区的土壤有机碳、微生物量碳、微生物熵和易氧化有机碳含量都有显著变化(p0.05)。各活性有机碳组分与土壤有机碳含量显著正相关(p0.01),各活性有机碳含量都随着土壤有机碳含量增加而增加。
[Abstract]:From May to September 2014, the soil samples of different hydroponds (no hydrops, seasonal hydroponds and perennial hydroponics) in the marshland meadow of Gahai wetland were studied to determine the content of active organic carbon in the soil. The difference of soil active organic carbon components in different hydroponding areas of marsh meadow was analyzed. The results showed that the maximum value of soil active organic carbon (AOC) in the depth of 40 cm was found in the perennial hydroponics area, followed by the soil active organic carbon content in the seasonal water accumulation area. The minimum value appears in the hydrostatic zone. The content of soil organic carbon and microbial biomass carbon in different soil depth of 20 ~ 40 cm depth was the highest in seasonal hydroponics area, and the lowest in non-hydroponding area, and the highest in other depth soil organic carbon, microbial biomass carbon and easily oxidized organic carbon content in perennial water accumulation area. The results showed that the active organic carbon and its components had more apparent surface aggregation. On different sampling days, soil organic carbon, microbial biomass carbon, microbial entropy and the content of easily oxidized organic carbon were significantly changed in each water accumulation area. Each active organic carbon component was positively correlated with soil organic carbon content, and the active organic carbon content increased with the increase of soil organic carbon content.
【作者单位】：甘肃农业大学林学院;兰州大学草地农业生态系统国家重点实验室;甘肃农业大学信息科学技术学院;甘肃尕海则岔国家级自然保护区管理局;
【基金】：国家自然科学基金项目(31260155和41561022) “高等学校博士学科点专项科研基金”联合资助课题(20126202110006) 甘肃省自然科学资金项目(1506RJZA015) 甘肃省高等学校科研项目(2015A-067;2014A-058) 草地农业生态系统国家重点实验室开放课题(SKLGAE201408)资助
【分类号】：S153.6

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