碎屑岩区不同土地利用土壤溶解有机碳剖面分布  

Dissoved Organic Carbon Distribution of Clastic Rock Red Soil under Effects of Different Land Use

作　　者：覃灵华[1] 黄艳[2] 徐祥明[2] 

机构地区：[1]赣南师范学院生命与环境科学学院,江西赣州341000 [2]赣南师范学院地理与规划学院,江西赣州341000

出　　处：《湖北农业科学》2016年第2期310-313,共4页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(41301226);岩溶动力学重点实验室开放基金资助课题项目(KDL2012-06;201306);江西省自然科学基金项目(20132BAB213020);江西省教育厅青年科学基金项目(GJJ13645);赣南师范学院科研课题项目(13kyz05)

摘　　要：选取碎屑岩红壤区三种主要土地利用类型林地、灌草丛、果园,挖掘典型剖面,并测定土壤溶解有机碳和基本理化性质,了解碎屑岩红壤溶解有机碳剖面分布对土壤理化性质的影响。结果表明,不同土地利用类型的溶解有机碳含量比较,林地>灌草丛>果园,林地与灌草丛无显著差异,但都与果园呈显著差异。不同土地利用方式土壤理化性质剖面分布比较:有机质、全氮和全磷的含量均为林地>灌草丛>果园;pH为果园>灌草丛>林地;黏粒(<0.002 mm)百分比为林地>灌草丛>果园。通过Pearson相关分析,溶解有机碳与有机质、全氮、全磷及黏粒(<0.002 mm)呈正相关关系,而与pH及容重呈负相关关系,其相关性均达到极显著水平。Soil samples of three land use types （woodland, shrub, orchard） were selected from clastic rock zone to obtain the dissolved organic carbon content and soil physical and chemical characteristics,to reveal the dissolved organic carbon dis- tribution of clastic rock red soil on pedon and the relationship with soil physical and chemical features. The results showed that, compared the dissolved organic carbon in different soil types, the woodland 〉 shrub 〉orchard. There was no significant difference between woodland and shrubthe, but there was significant difference between orchard and the other two land use type （woodland and shrubthe）. The contents of organic matter, total nitrogen, clay and total phosphorus had the same order, the woodland 〉 shrub 〉orchard. As to pH, the order was the orchard〉shrub〉woodland. By means of pearson correlation analy- sis, the dissolved organic carbon was positive correlation with organic matter, total nitrogen, clay and total phosphorus, while negative correlation with pH and bulk density.

关 键 词：碎屑岩红壤 溶解有机碳 不同土地利用 

分 类 号：S153.6[农业科学—土壤学] S154.1[农业科学—农业基础科学]