|本期目录/Table of Contents|

[1]郭利军 王百田** 王旭虎.晋西黄土区土地利用类型对阳坡土壤水分特征的影响[J].应用与环境生物学报,2020,26(03):1-9.[doi:10.19675/j.cnki.1006-687x.2019.08030]
 GUO Lijun,WANG Baitian**,WANG Xuhu.Effects of land use types on soil moisture characteristics of sunny slopes in the loess area of western Shanxi Province[J].Chinese Journal of Applied & Environmental Biology,2020,26(03):1-9.[doi:10.19675/j.cnki.1006-687x.2019.08030]
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晋西黄土区土地利用类型对阳坡土壤水分特征的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年03期
页码:
1-9
栏目:
研究论文
出版日期:
2020-06-25

文章信息/Info

Title:
Effects of land use types on soil moisture characteristics of sunny slopes in the loess area of western Shanxi Province
作者:
郭利军1 王百田12** 王旭虎1
1 北京林业大学水土保持学院 北京 100083
2 水土保持与荒漠化防治教育部重点实验室 北京 100083
Author(s):
GUO Lijun1 WANG Baitian12**WANG Xuhu1
1 School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China 2 Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China
关键词:
土地利用类型土壤含水量时空变化土壤深度阳坡
Keywords:
different land use soil water content spatiotemporal change soil depth sunny slope
DOI:
10.19675/j.cnki.1006-687x.2019.08030
摘要:
土壤水分是黄土区植被恢复建设过程中的主要限制因素,不同土地利用下阳坡坡面土壤水分变化研究较少,因此,以晋西黄土区土桥沟小流域为研究区,选取刺槐林、油松林、荒草地和梯田退耕地4种不同土地利用类型阳坡坡面为研究对象,用TDR土壤水分测量仪,以20 cm为间隔,测量阳坡各监测点0-200 cm土层土壤水分,并进行数理统计分析。结果表明:(1)观测期内,同一月份不同土地利用和同一土地利用不同月份阳坡土壤含水量差异显著(P<0.05),梯田退耕地各月土壤含水量较高,各土地利用类型10月份土壤平均含水量最高,6月份最低。(2)不同土地利用下阳坡土壤含水量均在0-100 cm土层变化较大,60 cm附近土壤含水量最高,随深度增加,变化趋势逐渐减弱,最终达到稳定状态,在观测范围内呈“S”状分布。(3)不同土地利用下阳坡坡面土壤水分活动层划分范围不同,刺槐林活跃层为0-80 cm,其深度范围大于其他3种土地利用类型,荒草地次活跃层深度范围最大为0-100 cm,此外,4种土地利用类型下,100-200 cm土层均为相对稳定层。(4)阳坡不同土地利用下土壤水分季节变异系数随土层深度增加先变大后减小,其中土壤水分季节变异系数均在土层40 cm处最大,140 cm左右开始趋于稳定。综上所述,阳坡不同土地利用类型下,土壤水分时空变化、土壤剖面活动层划分和土壤水分季节变异特征均呈现不同变化特征,结果可为黄土区阳坡植被恢复建设,土地与水资源有效利用提供理论依据。
Abstract:
Objectives: soil moisture(SM) is a main limiting factor in the process of vegetation restoration in the loess area. Less research was conducted on SM change of sunny slope s under different land use types .This paper mainly studied the dynamics of monthly and vertical profiles in SM , the division of soil water activity layers and the stratification characteristics of seasonal variation coefficients in different slopes of different land use types. Methods: taking the Tuqiaogou small watershed in the Loess Plateau of Shanxi Province as research area, four different land use slopes from Robinia pseudoacacia forest, Pinius tabulaeformis forest, barren grass field and terraced field were selected as research objects, TDR soil moisture meter was used to measure SM to a depth of 0-200 cm at 20 cm intervals at each monitoring point of the sunny slope, and results were analyzed using mathematical statistics. Results: the results show that: (1) during the observation period, the SM of different slopes in different months and different land uses in the same month w ere significantly different (P<0.05), and the SM content of the terraced field was higher in each month. The average SM of each land use type was highest in October , but lowest in June. (2) the SM of sunny slopes under different land uses varied greatly in the 0-100 cm soil layer, where the SM was highest near 60 cm. With the increase of depth, the change trend gradually weakened, and finally reached a stable state, showing “S” in the observation range. (3) the soil water activity layer s of different slopes were different in different land use s. The active layer of R pseudoacacia forest was 0-80 cm, and its depth range was wider than that of other types. The depth of sub-active layer in the grassland was 0-100 cm. In addition, under the four land use types, 100-200 cm soil layers were relatively stable layers. (4) the seasonal variation coefficient s of SM on the sunny slopes under different land uses decreased first , and then decreased with the increase of soil depth. The coefficient was largest at 40 cm soil layer , and began to stabilize at around 140 cm. Conclusions: on sunny slopes under different land use types, the spatio-temporal changes of SM, the division of soil profile, and the seasonal variation showed different characteristics. The results can provide a theoretical basis for effective utilization of land and water resources in the loess area of western Shanxi Province .

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备注/Memo

备注/Memo:
收稿日期 Received: 2019-08-21 接受日期 Accepted: 2019-10-21
*国家重点研发项目(2016YFC0501704),国家科技支撑课题(2015BAD07B02)资助
**通讯作者 Corresponding author (E-mail: wbaitian@bjfu.edu.cn)
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更新日期/Last Update: 2019-12-04