WANG Yueling,XU Hao,AN Yu,et al.Interannual Dynamic of Soil Moisture in Typical Plantation and Grassland in the Loess Region of Southern Ningxia[J].Northern Horticulture,2023,(22):68-75.[doi:10.11937/bfyy.20231594]
宁南黄土区典型林草地土壤水分年际动态变化特征
- Title:
- Interannual Dynamic of Soil Moisture in Typical Plantation and Grassland in the Loess Region of Southern Ningxia
- 文章编号:
- 1001-0009(2023)22-0068-08
- 分类号:
- S 152.7
- 文献标志码:
- A
- 摘要:
- 以宁夏彭阳中庄小流域典型林草地(山杏林、沙棘林、苜蓿地)为供试样地,采用土壤温湿度监测仪定位监测了2020—2022年样地生长季(5—10月)0~2 m土壤体积含水量,研究了不同林草地土壤水分动态变化规律,以期为该区域林草的合理选择和水资源有效利用提供参考依据。结果表明:1)在生长季内,不同林草地土壤水分的季节变化可以划分为消耗期(5—8月)和补偿期(9—10月),平水年(2020和2021年)土壤水分波动较大,干旱年(2022年)土壤水分变化较为平缓;3年间不同林草地土壤水分均表现为山杏林>沙棘林>苜蓿地;2)不同林草地0~40 cm土壤水分易受降雨影响,季节波动性最大,40~100 cm土壤水分受降雨影响较小,季节波动性开始减弱,100~200 cm土壤水分受降雨影响最小,季节波动性相对比较稳定;3)不同林草地土壤水分剖面分布年度变化趋势是一致的,土壤水分变化均表现为平水年(2020年)>平水年(2021年)>干旱年(2022年),与年度降雨量的变化相一致。
- Abstract:
- Taking three typical plantation and grassland (Prunus armeniaca forest,Hippophae rhamnoides forest,alfalfa land) in Pengyang Zhongzhuang small watershed of Ningxia as the sample sites,the soil volumetric moisture content of 0—2 m in the growing season (May to October) from 2020 to 2022 was monitored by using soil temperature and humidity monitor,and the dynamic change characteristics of soil water were analyzed,in order to provide reference for rational selection of forest and grass and effective utilization of water resources.The results showed that,1) during the growing season,the seasonal variation of soil moisture in different forests and grasses could be divided into two periods,consumption period (May—August) and compensation period (September—October).The rainfall in normal water years (2020 and 2021) varied greatly with the season,while the rainfall in dry year (2022) varied little with the season,and the soil moisture changed gently.In the three years,the soil moisture of different forest and grass plots showed the order of Prunus armeniaca forest>Hippophae rhamnoides forest>alfalfa land.2) The soil moisture of 0-40 cm of different forest and grassland land was easily affected by rainfall,and the seasonal fluctuation was the highest;the soil moisture of 40-100 cm was less affected by rainfall,and the seasonal fluctuation began to weaken;the soil moisture of 100-200 cm was least affected by rainfall,and the seasonal fluctuation was relatively stable.3) The annual variation trend of soil water profile distribution in different forest and grassland areas was consistent,and the variation of soil water profile was in the order of normal water year (2020)>normal water year (2021)>dry year (2022),which was consistent with the change of annual rainfall.
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备注/Memo
第一作者简介:王月玲(1980-),女,硕士,副研究员,现主要从事黄土高原水土保持与生态环境建设等研究工作。E-mail:wylnxnky@163.com.责任作者:许浩(1979-),男,博士,副研究员,现主要从事生态修复等研究工作。E-mail:hz92@163.com.基金项目:宁夏区自然科学基金资助项目(2022AAC03422);宁夏农业高质量发展和生态保护科技创新示范资助项目(NGSB-2021-14-02);宁夏重点研发计划资助项目(2021BEG03017);中央引导地方科技发展专项资助项目(2021FRD05020)。收稿日期:2023-05-10