[1]戴军杰,章新平,吕殿青,等.南方红壤丘陵区樟树林土壤水分动态变化[J].水土保持研究,2019,26(04):123-131.
　DAI Junjie,ZHANG Xinping,LÜ,et al.Dynamics of Soil Water in Cinnamomum camphora Forest in the Red Soil Hilly Region of South China[J].Research of Soil and Water Conservation,2019,26(04):123-131.
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南方红壤丘陵区樟树林土壤水分动态变化

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年04期 页码: 123-131 栏目: 出版日期: 2019-06-11
Title:
Dynamics of Soil Water in Cinnamomum camphora Forest in the Red Soil Hilly Region of South China
作者:
戴军杰1, 章新平1,2, 吕殿青1, 罗紫东1, 贺新光1,2
1. 湖南师范大学 资源与环境科学学院, 长沙 410081;
2. 湖南师范大学 地理空间大数据挖掘与应用湖南省重点实验室, 长沙 410081
Author(s):
DAI Junjie1, ZHANG Xinping1,2, LÜ Dianqing1, LUO Zidong1, HE Xinguang1,2
1. College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China;
2. Hunan Key Laboratory of Geospatial Big Data Mining and Application, Hunan Normal University, Changsha 410081, China
关键词:
红壤; 樟树林; 土壤水分; 蒸散发; 降水
Keywords:
red soil; Cinnamomum camphora forest; soil moisture; evapotranspiration; precipitation
分类号:
S152.7
摘要:
为了解南方红壤丘陵区樟树林地土壤水分变化规律，对0—100 cm不同深度的土壤水分与温度以及相应气象要素连续l年的观测，并基于土壤水分平衡法计算蒸散量，研究土壤水分的时空变化、蒸散量变化和对降水的响应。结果表明：（1）观测期土壤水分的季节变化可划分为丰水期（3—6月）、耗水期（7—10月）和补水期（11月—次年2月）；（2）土壤体积含水量由浅至深表现为增长型，稳定性增强，且垂向变化具有显著季节差异；（3）非降水日林地蒸散量的季节变化表现为耗水期（3.28 mm/d）> 丰水期（1.83 mm/d）> 补水期（1.0 mm/d），蒸散量日内变化呈现白天强、夜间弱的特征，日蒸散量与日均气温、VPD、太阳辐射均呈极显著正相关；（4）土壤水分干季比湿季对降水响应更强烈，湿季9 mm、干季3 mm的降水使最大下渗深度达10 cm，土壤水分开始接受补给。林地土壤水分受降水和蒸散发影响，具有显著时空分异。
Abstract:
To understand the dynamics of soil water in Cinnamomum camphora forest in the red soil hilly region of south China, soil moisture and temperature in 0—100 cm soil layer and meteorological factors were observed in the entire year. Evapotranspiration was calculated based on soil moisture balance method. The temporal and spatial variations of soil moisture, evapotranspiration and their response to precipitation were studied. The results showed that: (1) the seasonal variation of soil moisture during the observation could be divided into three stages, i. e. water-rich period (from March to June), water-consuming period (from July to October) and water-replenishing period (from November to following February); (2) soil bulk water content increased from shallow to deep, and its stability increased, and its vertical variation had significant seasonal difference; (3) the seasonal variation of forest land evapotranspiration in non-precipitation days decreased in the sequence: water-consuming period (3.28 mm/day) > water-rich period (1.83 mm/day) > water-replenishing period (1.0 mm/day); the diurnal variation was characterized as strong change on daytime and weak change at night. Daily evapotranspiration was significantly positively correlated with daily average temperature, VPD and solar radiation; (4) the response of soil moisture to precipitation in dry season was stronger than that in wet season; the precipitation of 9 mm in wet season and 3 mm in dry season made the maximum depth of infiltration reach up to 10 cm, and thus, soil moisture could be replenished. Soil moisture in forestland was significantly affected by precipitation and evapotranspiration, and presented the significant spatiotemporal distribution.

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备注/Memo

收稿日期:2018-11-14;改回日期:2018-12-21。
基金项目:国家自然科学基金（41571021）；湖南省重点学科建设项目（20160001）
作者简介:戴军杰(1995-),男,江西萍乡人,硕士研究生,主要从事生态水文方向研究。E-mail:473995984@qq.com
通讯作者:章新平(1956-),男,湖南长沙人,博士,教授,主要从事气候变化与水文同位素研究。E-mail:zxp@hunnu.edu.cn

更新日期/Last Update: 1900-01-01