北方半干旱沙地两个不同降水区不同固沙植被类型下的深层渗流与土壤水分动态

IF 5.6 1区农林科学 Q1 AGRONOMY

Agricultural and Forest Meteorology Pub Date : 2025-02-18 DOI:10.1016/j.agrformet.2025.110455

Liang He , Yiben Cheng , Wenbin Yang , Jianbin Guo , Zhiming Xin , Lin Chen , Wei Xiong , Qianqian Wang , Huaiyuan Liu

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引用次数: 0

摘要

大规模造林无疑有助于防治荒漠化，但它也对水文循环，特别是对深渗和土壤水动力学产生负面影响。本研究旨在通过现场试验和直接测量，填补目前两种不同降水区域不同固沙植被类型对DP和土壤水分影响研究的空白。研究了毛乌素沙地4个样地（流动沙[MS]、油蒿半灌木固定沙[AOF]、沙柳灌木固定沙[SPF]、蒙古松乔木固定沙[PSMF]）和科尔沁沙地3个样地（流动沙、小叶锦鸡儿灌木固定沙[CMF]、白杨乔木固定沙[PBLF]）的不同植被类型。为了准确估算不同植被类型下的DP和土壤水分，采用深渗记录仪测量DP，并基于土壤水分计算相对可提取土壤水分（RESW）。两个站点发生DP的MS的降雨阈值（10 mm）相同，但引起DP显著增加的降雨事件期间的降水量不同。在日和月尺度上，植被的冠层截流和根系吸收显著降低了DP量。两区植被样地DP量排序为：半灌木；灌木比;阿伯。与MS相比，植被样地土壤剖面（0 ~ 200 cm） RESW显著降低。40 ~ 200 cm土层内，灌木样地RESW显著高于乔木样地。乔木样地水分收支不平衡，对120 ~ 200 cm深层土壤水分消耗较多。研究结果为生态修复和水资源管理提供了科学依据。

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Deep percolation and soil water dynamics under different sand-fixing vegetation types in two different precipitation regions in semiarid sandy Land, Northern China

Large-scale afforestation has undoubtedly aided in combating desertification but it also exerts negative effects on the hydrological cycle, particularly on deep percolation (DP) and soil water dynamics. This study aims to fill the gap in current research on the effect of different sand-fixing vegetation types on DP and soil water in two different precipitation regions through in-situ tests and direct measurements. The experiment focused on various vegetation types in two sites with different precipitation levels: the Mu Us Sandy Land with four plots (mobile sand [MS], Artemisia ordosica semishrub fixed [AOF], Salix psammophila shrub fixed [SPF], and Pinus sylvestrix var. Mongolica arbor fixed [PSMF] sands) and the Horqin Sandy Land with three plots (mobile sand, Caragana microphylla shrub fixed [CMF] and Populus bolleana Lauche arbor fixed [PBLF] sands). To accurately estimate DP and soil water under various vegetation types, DP was measured using a deep percolation recorder and the relative extractable soil water (RESW) was calculated based on soil water. The rainfall threshold (10 mm) of MS for the occurrence of DP was the same in both sites but the precipitation amount during a rainfall event causing significant increases in DP was different. The canopy interception and root uptake of vegetation significantly reduced DP amount compared with MS at the daily and monthly scales. The DP amount in vegetated plots in the two areas could be ranked as follows: semishrub > shrub > arbor. Compared with MS, the soil profile (0–200 cm) of vegetated plots showed significant decreases in RESW. Within the soil layer of 40–200 cm, RESW was significantly higher in shrub plots than in arbor plots. Arbor plots had an imbalanced water budget, consuming more deep soil water (120–200 cm). Our findings provide a scientific foundation for ecological restoration and water resource management.

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来源期刊

Agricultural and Forest Meteorology 农林科学-林学

CiteScore

10.30

自引率

9.70%

发文量

415

审稿时长

69 days

期刊介绍： Agricultural and Forest Meteorology is an international journal for the publication of original articles and reviews on the inter-relationship between meteorology, agriculture, forestry, and natural ecosystems. Emphasis is on basic and applied scientific research relevant to practical problems in the field of plant and soil sciences, ecology and biogeochemistry as affected by weather as well as climate variability and change. Theoretical models should be tested against experimental data. Articles must appeal to an international audience. Special issues devoted to single topics are also published. Typical topics include canopy micrometeorology (e.g. canopy radiation transfer, turbulence near the ground, evapotranspiration, energy balance, fluxes of trace gases), micrometeorological instrumentation (e.g., sensors for trace gases, flux measurement instruments, radiation measurement techniques), aerobiology (e.g. the dispersion of pollen, spores, insects and pesticides), biometeorology (e.g. the effect of weather and climate on plant distribution, crop yield, water-use efficiency, and plant phenology), forest-fire/weather interactions, and feedbacks from vegetation to weather and the climate system.