中国农业大学学报2017，Vol.22Issue(12)：83-94,12.DOI:10.11841/j.issn.1007-4333.2017.12.10
塔里木盆地北缘绿洲不同土地利用方式土壤有机碳、无机碳变化及其土壤影响因子
Changes in SOC and SIC concentration with land uses and their soil influencing factors in northern marginal zones of Tarim Basin
摘要
Abstract
Organic/inorganic carbon contents and physical-chemical factors in oasis soil,and the correlations between them were analyzed by traditional statistics and redundancy analysis in the northern marginal zones of Tarim Basin.The results showed that the soil organic and inorganic carbon content in different land use types of soil had different distribution pattern.In 0-20,20-50 and 50-80 cm soil layers the average of soil carbon properties (soil organic and soil inorganic carbon) were 6.97,2.95,2.45 g/kg and 4.83,5.25,3.48 g/kg,respectively.In 0-20 cm soil layer,the content of soil organic carbon was highest under natural forest,lowest under sand,the soil inorganic carbon under cotton fields,saline-alkali land,weeds land were similar and much higher than other three types;In 20-50 cm soil layer,the content of organic carbon under natural forests and plantation were reached highest and significantly higher than weeds and sand,the distribution of the inorganic carbon was in line with 0-20 cm soil layer;In 50-80 cm soil layer,the content of organic carbon under orchard and cotton fields is significantly higher than sand,the content of inorganic carbon under different types was not significant in this soil layer.According to the RDA results,the total nitrogen,soil moisture and total salt were significantly positive correlated with soil organic carbon content (P＜0.01),and bulk density was significant negative correlated with it (P＜0.01).The total salt was significantly positive correlated with soil inorganic carbon content (P＜0.01),and the total nitrogen,soil moisture,available potassium were significantly negative correlated with soil inorganic carbon content (P＜0.01).There was no significant correlationsbetween pH/available P and the content of soil carbon (P＞0.05);The importance of environmental factors to soil carbon content in descending order was nitrogen＞bulk density＞soil moisture＞available P＞available K＞total salt＞pH.关键词
土壤有机碳/土壤无机碳/不同土地利用类型/冗余分析/塔里木盆地北缘Key words
soil organic carbon/soil inorganic carbon/different land use types/redundancy analysis/the northern marginal zones of Tarim Basin分类
农业科技引用本文复制引用
贡璐,罗艳,解丽娜..塔里木盆地北缘绿洲不同土地利用方式土壤有机碳、无机碳变化及其土壤影响因子[J].中国农业大学学报,2017,22(12):83-94,12.基金项目
自治区青年科技创新人才培养工程(qn2015yx002) （qn2015yx002）
国家自然科学基金项目(41461105) （41461105）
