松嫩平原沙丘-草甸复合生态系统土壤水分时空变化特征

胡娟; 禹朴家; 周道玮

doi:10.11689/j.issn.2095-2961.2020.03.009

松嫩平原沙丘-草甸复合生态系统土壤水分时空变化特征

1. 中国科学院东北地理与农业生态研究所/吉林省草地畜牧重点实验室, 吉林长春 130102;
2. 西南大学地理科学学院, 重庆 400715

基金项目:

中国科学院科技服务网络计划STS项目(KFJ-STS-ZDTP-048-03).

松嫩平原碱化草甸改良技术与资源优化利用(2016YFC0500606)

详细信息

作者简介:
胡娟(1985-),女,博士,助理研究员,主要从事土壤环境优化机理与农业废弃物资源化研究.E-mail:hujuan@iga.ac.cn.

通讯作者:
周道玮(1963-),男,博士,研究员,主要从事草地扰动生态学和草地恢复生态学研究.E-mail:zhoudaowei@iga.ac.cn.

中图分类号: S156.4
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出版历程
- 收稿日期: 2019-12-23
- 修回日期: 2020-01-09
- 网络出版日期: 2021-11-01
- 刊出日期: 2020-08-31

Spatio-temporal variation of soil moisture in compound ecosystem with sand and meadow in Songnen Plain

1. Jilin Provincial Laboratory of Grassland Farming, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;
2. School of Geographical Sciences, Southwest University, Chongqing 400715, China

摘要

摘要: 为了探究松嫩平原内典型沙丘-草甸复合生态系统土壤水分的时空变化特征,采用烘干法测定了沙丘、草甸、沙丘和草甸结合部2016年5-10月0~300 cm深度土壤垂直剖面土壤含水量。结果表明:不同部位平均土壤含水量存在极显著差异,表现为草甸>沙丘>结合部。不同部位平均土壤含水量在0~300 cm深度土壤剖面上有明显分层现象。沙丘和结合部平均土壤含水量以100 cm深度为界划分为两个带,沙丘平均土壤含水量表现为"先增加后减少",而结合部表现为"先减少后增加"。草甸平均土壤含水量以30 cm和150 cm深度为界划分为三个带,表现为"先增加后降低再增加"的变化趋势。不同部位0~300 cm土层土壤含水量具有明显的月动态变化特征,其中沙丘50~70 cm深度和结合部0~30 cm深度在9-10月的土壤含水量明显高于5-8月。为松嫩平原内盐碱土的水盐运移规律,土壤盐碱化的防治以及盐碱土的改良利用提供理论基础。
- 松嫩平原 /
- 土壤水分 /
- 时空分布 /
- 沙丘 /
- 草甸 /
- 沙丘草甸结合部
Abstract: The objective of this study was to explore the temporal and spatial distributions of soil moisture content in the compound ecosystem with sand and meadow in the Songnen Plain.The soil moisture contents of 0-300 cm soil depth from May to October in sand,meadow,and middle regions were measured using the oven dry method.Results showed that the average soil moisture contents in different position in the compound ecosystem of sand and meadow were significantly different with the trend of meadow>sand land>middle.The stratification of average soil moisture contents in different positions was found within 0~300 cm soil depth.The average soil moisture contents in sand and middle position were divided into two zones at the depth of 100 cm.The average soil moisture content of sand increased in 0-100 cm soil depth,and declined in 100-300 cm soil depth.The average soil moisture content of middle decreased in 0-100 cm soil depth,and increased in 10-300 cm soil depth.The average soil moisture content in the meadow was divided into three zones by the depth of 30 cm and 150 cm,which quickly increased in 0-30 cm,while declined in 30-150 cm,and then increased in 150-300 cm.Monthly dynamics of soil moisture content in different parts of compound ecosystem of sand and meadow was very obvious.The average soil moisture contents of sand (50-70 cm) and middle area (0-30 cm) in September and October were obviously higher than other months.Results from this research would be helpful in exploring the regulation of water-salt transport,and preventing and utilizing saline soil resources in the Songnen Plain.
- Songnen Plain /
- soil moisture content /
- spatio-temporal variation /
- sand /
- meadow /
- middle area of sand and meadow

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