| 1986—2019年黑龙江省松嫩平原表层土壤有机碳变化及固碳潜力估算 |
| |
| 引用本文： | 张立,金晶泽,姜侠,毛龙,崔玉军,李瑛,王恩宝.1986—2019年黑龙江省松嫩平原表层土壤有机碳变化及固碳潜力估算[J].现代地质,2021,35(4):914-922. |
| |
| 作者姓名： | 张立 金晶泽 姜侠 毛龙 崔玉军 李瑛 王恩宝 |
| |
| 作者单位： | 1.黑龙江省自然资源调查院, 黑龙江 哈尔滨 1500362.黑龙江省黑土地水土资源研究重点实验室, 黑龙江 哈尔滨 1500363.黑龙江省地质矿产局, 黑龙江 哈尔滨 150036 |
| |
| 基金项目： | 中国地质调查局项目“多目标生态农业地球化学调查”(1212010511217);黑龙江省黑土地水土资源研究重点实验室科技创新基金项目(HDDK-201901) |
| |
| 摘 要： | 土壤有机碳(SOC)是评价土壤肥力和固碳能力的重要指标。因此,研究土壤有机碳的变化,对准确评价区域土壤固碳潜力,实现土壤资源的可持续利用具有重要的意义。利用黑龙江省第二次土壤普查数据和2019年实测土壤数据,运用GIS空间分析方法,分析了1986—2019年黑龙江省松嫩平原表层(0~20 cm)土壤有机碳密度(SOCD)的时空变化特征,运用土壤类型法估算了土壤有机碳储量,运用平衡法估算了土壤固碳潜力。结果表明:30多年来表层SOCD平均减少1.06 kg/m2,SOCD减少的地区主要分布在黑龙江省松嫩平原中部和东南部地区;表层SOC储量减少约143.99 Tg,SOC储量减少较多的土壤类型是草甸土、黑钙土和黑土,三者减少量占总SOC储量减少量的84.55%;当前黑龙江省松嫩平原表层土壤固碳潜力为-2.08 Tg,其中暗棕壤、白浆土、黑土为正潜力,其余土壤类型为负潜力。建议通过增施有机化肥、秸秆还田、推广免耕少耕等方法措施,以提高松嫩平原土壤固碳潜力。
|
| 关 键 词： | 土壤有机碳 有机碳密度 时空变化 固碳潜力 松嫩平原 |
| 收稿时间： | 2021-03-10 |
| 修稿时间： | 2021-03-25 |
Variations of Organic Carbon and Evaluation of Carbon Sequestration Potential in Surface Soil in Songnen Plain of Heilongjiang Province from 1986 to 2019 |
| |
| ZHANG Li,JIN Jingze,JIANG Xia,MAO Long,CUI Yujun,LI Ying,WANG Enbao.Variations of Organic Carbon and Evaluation of Carbon Sequestration Potential in Surface Soil in Songnen Plain of Heilongjiang Province from 1986 to 2019[J].Geoscience——Journal of Graduate School,China University of Geosciences,2021,35(4):914-922. |
| |
| Authors: | ZHANG Li JIN Jingze JIANG Xia MAO Long CUI Yujun LI Ying WANG Enbao |
| |
| Institution: | 1. Heilongjiang Institute of Natural Resources Survey, Harbin, Heilongjiang 150036, China2. Key Laboratory of Black Soil and Water Resources Research of Heilongjiang Province, Harbin, Heilongjiang 150036, China3. Bureau of Geology and Mineral Resources of Heilongjiang Province, Harbin, Heilongjiang 150036, China |
| |
| Abstract: | Soil organic carbon (SOC)is a key index to evaluate soil fertility and soil C sequestration. Therefore, it is important to study variations in SOC to accurate assessment of regional soil C sequestration potential and sustainable utilization of soil resource. Based on the Second National Soil Survey and the data derived from the soil profiles measured from the farmland in 2019, we analyzed the temporal and spatial variations of soil organic carbon density (SOCD)in the surface layer (0-20 cm)in Songnen Plain of Heilongjiang Province, via the GIS spatial analysis technique, and estimated the soil organic carbon reserves using the soil type method and the potential of soil carbon sequestration using the balance method. The results show that the surface SOCD decreased by 1.06 kg/m2 on average over the past 30 years, the area with the decrease of SOCD mainly distri-buted in the middle and southeast of Songnen Plain in Heilongjiang Province. The surface SOC reserves decreased by about 143.99 Tg. Soil types with more decrease of SOC were meadow soil, chernozem and black soil, which accounted for 84.55% of the total decrease of SOC. The current Songnen Plain had a carbon sequestration potential of -2.08 Tg, including dark brown soil, albic soil and black soil is a positive potential, and the other soil types are a negative potential. It is suggested that the potential of soil carbon sequestration in Songnen Plain should be improved by increasing the application of organic fertilizer, returning straw to the field, and promoting the cultivation method of no tillage and less tillage. |
| |
| Keywords: | soil organic carbon organic carbon density temporal and spatial variation carbon sequestration potential Songnen Plain |
|
| 点击此处可从《现代地质》浏览原始摘要信息 |
| 点击此处可从《现代地质》下载免费的PDF全文 |
|
