Soil water deficit was effectively alleviated by higher water infiltration after the short-term forestland-to-farmland conversion in semi-arid area

渗透(HVAC) 环境科学 下层林 植树造林 土壤水分 干旱 含水量 土层 农林复合经营 水文学(农业) 土壤科学 地质学 天蓬 生态学 地理 生物 古生物学 气象学 岩土工程
作者
Zeng Cui,Zhe Huang,Yubin Wang,Jia-Xin Qian,Guoxiong Wu
出处
期刊:Journal of Hydrology [Elsevier BV]
卷期号:610: 127893-127893 被引量:6
标识
DOI:10.1016/j.jhydrol.2022.127893
摘要

The increasing global vegetation aggravated the consumption of soil water and caused soil desiccation, which may result in a threat to the survival and sustainability of vegetation, especially in semi-arid and arid areas. How to solve soil water deficit caused by afforestation is an important practical problem. Here, a field experiment of soil water infiltration and replenishment was conducted before and after forestland-to-farmland conversion. Results showed that the cumulative infiltration of each stage (the initial stage, the transitional stage, and the stable stage) was the highest in farmland, followed by forest interspace, and the lowest in forest understory. The non-capillary porosity at 0–20 cm soil layer in farmland was higher than that in forest understory and interspace, which positively improved the infiltration accumulation in the initial stage. Thus, the cumulative infiltration in initial stage of farmland (28.93 mm) was significantly higher than that of forest understory (19.45 mm). Moreover, soil water at the depth of 0–160 cm soil layer was replenished with short term after forestland-to-farmland conversion. It is concluded that forestland-to-farmland conversion could improve soil water infiltration rate and cumulative infiltration by changing porosity, and effectively replenished soil water storage in the short term. These findings have potential implications for effective mitigation of soil water deficit caused by afforestation, and provide a new idea or method for the solution to dry soil layers caused by artificial forestland in semi-arid areas.
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