新疆土壤有机碳与土壤理化性质的相关性

根据全国第2次土壤普查新疆维吾尔自治区的相关土壤资料数据,分析了新疆(0!50cm)土壤有机碳与土壤理化性质的相关性,以期对研究区土壤进行科学管理,从而有助于合理地耕作和科学地施肥,同时也为研究新疆碳循环机制提供丰富而准确的信息。相关性分析表明,研究区土壤全氮、阳离子交换量均与土壤有机碳含量存在着显著的正相关关系(P0.05)。其中,土壤有机碳与全氮的相关性最大(P0.000 1,R2=0.936 7);土壤pH、土壤容重与土壤有机碳含量呈显著负相关关系(P0.05);全磷、全钾、土壤孔隙度与土壤有机碳含量未达到显著相关水平(P0.05)。本研究结果有助于系统、科学地分析干旱区土壤生态系统在全球气候变化中的贡献及生态意义。

Soil organic carbon in relation to soil physicochemical properties in Xinjiang

Analysing the relevance between variable soil physicochemical properties and soil organic carbon (SOC) content using soil data available from Xinjiang Uygur Autonomous Region will help us in farming using scientific fertilization and management of the Xinjiang soil.Significant and positive correlations were found between soil total nitrogen,cation exchange capacity,and the SOC content.Among them,the strongest correlation was between the quantity of SOC and total nitrogen (P＜0.0001,the determination coefficient R2=0.936 7).Soil pH and the soil bulk density showed negative correlation with SOC content (P＜0.05).The total phosphorus,total potassium,soil porosity,and soil organic carbon content was not significantly correlated (P＞0.05).The results can help to scientifically analyse the contribution and ecological significance of the soil ecosystem in arid areas in the global climate change scenario.