新疆温性荒漠土壤有机碳和无机碳含量垂直分布的影响因素

Influencing Factors of Vertical Distribution of Soil Organic and Inorganic Carbon in Xinjiang Temperate Desert

在典型的干旱区新疆温性荒漠选取了121个样地,通过分析0~100 cm内不同土层深度的土壤有机碳(SOC)和无机碳(SIC)含量与气候、海拔、地上净初级生产力和根系生物量的相关性来研究SOC和SIC含量的垂直分布的影响因素。结果表明,在0~5 cm、5~10 cm、10~20 cm、20~30 cm、30~50 cm、50~70 cm和70~100 cm,SOC含量与年均降水量、海拔、地上净初级生产力和根系生物量均呈显著正相关,与年均温度无显著关系,与pH值呈显著负相关,与土石比无关,但在10~20 cm、20~30 cm、30~50 cm、50~70 cm和70~100 cm与容重呈极显著负相关。在0~5 cm、5~10 cm、10~20 cm、20~30 cm、30~50 cm、50~70 cm和70~100 cm,SIC含量与年均温度和海拔之间呈显著正相关,与年均降水量无关。0~5 cm、5~10 cm、10~20 cm、20~30 cm、30~50 cm、50~70 cm和70~100 cm,SIC含量与土壤容重呈现显著的负相关,与pH值无显著关系,但在0~5 cm、5~10 cm、10~20 cm、30~50 cm和70~100 cm与土石比呈显著正相关。在5~10 cm、10~20 cm、20~30 cm、30~50 cm、50~70 cm和70~100 cm,SOC和SIC含量呈显著正相关。

In this study,121 samples of soil organic carbon(SOC)and soil inorganic carbon(SOC)were collected from different soil depths within 0-100 cm in typical arid areas of Xinjiang temperate desert to study the influencing factors of vertical distribution of SOC and SIC content,the correlation of SOC and SIC content with climate,elevation,aboveground net primary productivity and root biomass.The results show that:In 0-5 cm,5-10 cm,10-20 cm,20-30 cm,30-50 cm,50-70 cm and 70-100 cm,SOC content was significantly positively correlated with mean annual precipitation,elevation,aboveground net primary productivity and root biomass,but had no significant relationship with mean annual temperature,which was negatively correlated with pH value,and had nothing to do with soil-rock ratio,but in 10-20 cm,20-30 cm,30-50 cm,50-70 cm and 70-100 cm,SOC and bulk density was significantly negatively correlated.In 0-5 cm,5-10 cm,10-20 cm,20-30 cm,30-50 cm,50-70 cm and 70-100 cm,the SIC content was positively correlated with the mean annual temperature and elevation,but not with the mean annual precipitation.In 0-5 cm,5-10 cm,10-20 cm,20-30 cm,30-50 cm,50-70 cm and 70-100 cm,SIC content was negatively correlated with soil bulk density,and had no significant relationship with pH value,but in 0-5 cm,5-10 cm,10-20 cm,30-50 cm and 70-100 cm,SIC content was positively correlated with soil-rock ratio.In 5-10 cm,10-20 cm,20-30 cm,30-50 cm,50-70 cm and 70-100 cm,SOC and SIC content was significantly positively correlated.