Study on Soil Moisture Dynamics in Growing Season of Sand-fixing Haloxylonammodendron Forest in Ulan Buhe Desert

doi:10.13304/j.nykjdb.2022.0862

Journal of Agricultural Science and Technology ›› 2023, Vol. 25 ›› Issue (7): 187-196.DOI: 10.13304/j.nykjdb.2022.0862

• BIO-MANUFACTURING & RESOURCE AND ECOLOGY • Previous Articles Next Articles

Study on Soil Moisture Dynamics in Growing Season of Sand-fixing Haloxylonammodendron Forest in Ulan Buhe Desert

Xuting HAO¹^,²(), Yaru HUANG¹^,², Yingbin MA¹^,²^,³(), Shuai ZHANG¹, Chunxia HAN¹, Jiacheng PANG¹, Guangfu XU¹, Huizhong HAO⁴, Yajing LIU¹

^1.Experimental Center of Desert Forestry，Chinese Academy of Forestry，Inner Mongolia Bayannur 015200，China
^2.Combat Desertification Engineering Technology Research Center，National Forestry and Grassland Administration，Inner Mongolia Bayannur 015200，China
^3.Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station，National Forestry and Grassland Administration，Inner Mongolia Bayannur 015200，China
^4.Changji Canal Water Supply Station of Wulat Sub Center of Water Resources Development Center of Hetao Irrigation District，Inner Mongolia Bayannur 014400，China

Received:2022-10-12 Accepted:2022-12-08 Online:2023-07-15 Published:2023-08-25
Contact: Yingbin MA

乌兰布和沙漠固沙梭梭林生长季土壤水分动态研究

郝需婷¹^,²(), 黄雅茹¹^,², 马迎宾¹^,²^,³(), 张帅¹, 韩春霞¹, 庞嘉诚¹, 徐光甫¹, 郝惠忠⁴, 刘雅婧¹

^1.中国林业科学研究院沙漠林业实验中心，内蒙古巴彦淖尔 015200
^2.国家林业草原防沙治沙工程技术研究中心，内蒙古巴彦淖尔 015200
^3.内蒙古磴口荒漠生态系统国家定位观测研究站，内蒙古巴彦淖尔 015200
^4.内蒙古河套灌区水利发展中心乌拉特分中心长济渠供水所，内蒙古巴彦淖尔 014400

通讯作者: 马迎宾
作者简介:郝需婷 E-mail：haoxuting123@126.com；
基金资助:
国家自然科学基金项目(32001374);中央引导地方科技发展资金项目(2021ZY0058);中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2021MA005)

Abstract

Abstract:

Soil moisture is the main limiting factor for the growth and development of desert vegetation in arid sandy areas. In order to understand the dynamic change characteristics of soil moisture in the sand-fixing Haloxylon ammodendron forest in Ulan Buhe Desert， the drying method was used to measure the soil moisture of Ammodendrus ammodendrus forest during the growing season from April to September in 2021. The results showed that， 0—20 cm of Haloxylonammodendron ammonium forest was shallow dry sand layer with soil moisture content 0.23%~2.13%， 20—80 cm was middle layer with severe changes with soil moisture content 0.36%~3.59%， and 80—120 cm was deep stable layer with soil moisture content 0.45%~1.63%. The month change of soil moisture content showed that the soil water consumption was weak in April， was vigorous from May to August， and was slowly restored and stabilized in September. There was an obvious logarithmic function relationship between the soil moisture content and soil water potential （R² is greater than 0.514 2）。In conclusion， the soil moisture in Saxoul woodland had obvious character of vertical distribution and stratification， and the variation degree of time was higher than that of space， which was of great significance for the construction of artificial vegetation in this area.

Key words: soil moisture content, temporal and spatial variation, Ulan Buhe Desert, sand-fixing Haloxylon ammodendron forest

摘要：

土壤水分是干旱沙区荒漠植被生长发育的主要限制因子，为了解乌兰布和沙漠固沙梭梭林地的土壤水分动态变化特征，采用烘干法于2021年4—9月对梭梭林生长季土壤水分进行测定。结果表明，梭梭林地0—20 cm土壤含水量0.23%~2.13%，为浅层干沙层；20—80 cm土壤含水量0.36%~3.59%，为中层剧烈变化层；80—120 cm土壤含水量0.45%~1.63%，为深层稳定层。土壤含水量的月变化显示在4月处于土壤水分消耗较弱阶段；5—8月处于土壤水分消耗旺盛阶段；9月处于土壤水分缓慢恢复稳定阶段。土壤水分与土壤水势之间存在明显的对数函数关系（R²均大于0.514 2）。综上所述，梭梭林地土壤水分垂直分布分层特征明显，时间上变异程度高于空间，具有较强的时间变异性，对该区人工植被建设具有重要意义。

关键词: 土壤含水率, 时空变化, 乌兰布和沙漠, 固沙梭梭林

CLC Number:

S152.75

Xuting HAO, Yaru HUANG, Yingbin MA, Shuai ZHANG, Chunxia HAN, Jiacheng PANG, Guangfu XU, Huizhong HAO, Yajing LIU. Study on Soil Moisture Dynamics in Growing Season of Sand-fixing Haloxylonammodendron Forest in Ulan Buhe Desert[J]. Journal of Agricultural Science and Technology, 2023, 25(7): 187-196.

郝需婷, 黄雅茹, 马迎宾, 张帅, 韩春霞, 庞嘉诚, 徐光甫, 郝惠忠, 刘雅婧. 乌兰布和沙漠固沙梭梭林生长季土壤水分动态研究[J]. 中国农业科技导报, 2023, 25(7): 187-196.

Figures/Tables 11

Fig. 1 Geographic location of the study area

Fig. 2 Meteorological factors from April to September 2021

Fig. 3 Variation of soil moisture content with time

Table 1 Comparison of differences in soil moisture content

月份Month	1号样地Plot 1	2号样地Plot 2	裸地对照Naked control
4月April	2.15±1.06 αa	1.72±1.06 αa	1.44±0.97 αa
5月May	1.61±0.82 αa	1.06±0.40 αβab	0.88±0.23 αb
6月June	0.83±0.35 βa	0.56±0.18 βa	1.24±0.50 αa
7月July	0.68±0.12 βa	0.61±0.13 βa	0.80±0.19 αa
8月August	0.51±0.14 βa	0.43±0.12 βa	0.71±0.28 αa
9月September	0.62±0.33 βa	0.7±0.71 βa	0.82±0.41 αa

Table 2 Basic characteristics of soil moisture in each month

样点Sample	M_max	M_min	M_avg	CV
1号样地Plot 1	1.71	0.57	1.07	61.00
2号样地Plot 2	1.60	0.42	0.88	60.73
裸地对照Naked control	2.63	0.43	1.13	35.05

Fig. 4 Variation of soil moisture content in sandy land with depth

Table 3 Basic characteristics of soil moisture in each soil layer

样点Sample	M_max	M_min	M_avg	CV
1号样地Plot 1	2.22	0.45	1.07	30.92
2号样地Plot 2	1.87	0.38	0.85	33.52
裸地对照Naked control	2.86	0.55	1.16	22.94

Fig. 5 Soil moisture content and precipitation in different locations from April to SeptemberNote： Different capital letters indicate significant differences between different months at P<0.05 level.

Fig. 6 Soil bulk density changes with depth

Fig. 7 Variation of soil water potential with soil depth in different months

Fig. 8 Relationship between soil moisture content and soil water potential

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Study on Soil Moisture Dynamics in Growing Season of Sand-fixing Haloxylonammodendron Forest in Ulan Buhe Desert

乌兰布和沙漠固沙梭梭林生长季土壤水分动态研究

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