塔里木盆地南缘典型绿洲不同土壤类型土壤有机碳含量及矿化特征

发布时间：2018-09-07 12:21

【摘要】：以塔里木盆地南缘典型绿洲于田绿洲为靶区,通过野外取样和实验分析,研究干旱区绿洲灌漠土、棕漠土、盐土和风沙土土壤有机碳含量及矿化特征,并探究有机碳矿化能力与土壤理化性质的关系。结果表明:于田绿洲不同类型土壤总有机碳含量依次为灌漠土棕漠土盐土风沙土,灌漠土和棕漠土有机碳含量随土壤剖面深度增加而减少;不同类型土壤有机碳矿化累积量具有显著差异,其中灌漠土有机碳总矿化量最高,达到0.245g·kg~(-1),风沙土最低,仅有0.145g·kg~(-1);各类型土壤有机碳矿化累积量和矿化率均随土壤剖面深度增加而减少;不同类型土壤有机碳矿化累积量与有机碳含量、全氮、速效磷、速效钾呈极显著或显著正相关,而与pH值呈显著负相关。
[Abstract]:Taking the typical oasis in the southern margin of Tarim Basin as the target area, the soil organic carbon content and mineralization characteristics of irrigated desert soil, brown desert soil, salt soil and wind-sandy soil in arid region were studied by field sampling and experimental analysis. The relationship between the mineralization ability of organic carbon and the physical and chemical properties of soil was investigated. The results showed that the content of total organic carbon of different types of soil in Yutian oasis was in order of irrigated desert soil brown desert soil windy sandy soil and irrigated desert soil and brown desert soil organic carbon content decreased with the increase of soil profile depth. The total mineralization amount of organic carbon in irrigated desert soil was the highest, reaching 0.245 g kg~ (-1), and that in wind-sand soil was the lowest. There were only 0.145g kg~ (-1), the accumulation and rate of organic carbon mineralization decreased with the increase of soil profile depth, and the accumulation of organic carbon, total nitrogen, available phosphorus and available potassium were significantly or significantly positively correlated with the soil profile depth. There was a significant negative correlation with pH.
【作者单位】：新疆大学资源与环境科学学院;绿洲生态教育部重点实验室;
【基金】：国家自然科学基金联合基金项目克里雅河流域水盐运移过程及其生态响应(U1138303)资助
【分类号】：S153.6

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