Dynamic characteristic of soil water with an increase in restoration years on the shady and sunny slope aspects of the Loess Plateau

Wenming, 安文明 An; Haibin, 梁海斌 Liang; Cong, 王聪 Wang; Shuai, 王帅 Wang; Zongshan, 李宗善 Li; Yihe, 吕一河 Lü; Guohua, 刘国华 Liu; Bojie, 傅伯杰 Fu

doi:10.5846/stxb201606241237

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“…The study found that the soil moisture of the C. korshinskii plantations with varying stand ages was generally greater on semi-shady slopes than on sunny slopes, which conformed to previous research [27,28]. This difference in moisture among the different slope directions was due to varying levels of precipitation redistribution and solar radiation on different slope aspects.…”

Section: Spatiotemporal Dynamics Of Soil Moisture Under Caragana Kors...supporting

confidence: 88%

Soil Moisture Dynamics and Its Temporal Stability under Different-Aged Caragana korshinskii Shrubs in the Loess Hilly Region of China

Liang

et al. 2023

Water

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Soil moisture has a great influence on vegetation growth and survival in arid and semiarid regions. Information about deep soil moisture dynamics is vital for restoring vegetation and improving land management on the water-limited Loess Plateau. The spatiotemporal dynamics and temporal stability of deep soil moisture (at a soil depth of 600 cm) were observed in situ under Caragana korshinskii shrubs that had various stand ages (named CK-10yr, CK-20yr and CK-35yr) in the Loess hilly region of China. The results showed that under C. korshinskii, soil moisture generally decreased as the stand age rose. Meanwhile, its moisture was consistent with precipitation variation, and an obvious time lag in soil moisture was found compared to that in precipitation during the entire growing season. Along the soil profile, a transition belt linking the shallow with deep soil moisture occurred at a 200 cm soil depth in different slope positions and aspects. At the slope scale, both the slope aspect and slope position significantly affected soil moisture variation in the areas with planted C. korshinskii shrubs, experiencing a decreasing trend from semi-shady slopes to sunny ones and from lower positions to upper ones. However, the variance in soil moisture between different positions and slope aspects was small. For the slope aspect, except for CK-20yr, the different-aged C. korshinskii shrubs had higher soil moisture content on sunny slopes than on semi-shady slopes at the upper 0–200 cm soil depth, while the opposite was true at the 200–600 cm soil depths. For slope positions, the soil moisture variation was small between the 0 and 200 cm soil depths and larger between the 200 and 600 cm soil depths. Within the whole profiles, the representative depth under the C. korshinskii shrubs for the soil moisture content was mainly concentrated between the 400–500 cm soil depths, on average, showing a gradual deepening trend with increasing restoration age. In summary, the findings indicate that natural recovery with low-water consumption grasslands and manual management measures, such as thinning and mowing, should be strengthened to minimize the high soil moisture consumption rates that occur in a healthy soil moisture environment and maintain sustainable vegetation restoration.

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Section: Spatiotemporal Dynamics Of Soil Moisture Under Caragana Kors...supporting

confidence: 88%

Soil Moisture Dynamics and Its Temporal Stability under Different-Aged Caragana korshinskii Shrubs in the Loess Hilly Region of China

Liang

et al. 2023

Water

View full text Add to dashboard Cite

show abstract

Dynamic characteristic of soil water with an increase in restoration years on the shady and sunny slope aspects of the Loess Plateau

Cited by 1 publication

References 0 publications

Soil Moisture Dynamics and Its Temporal Stability under Different-Aged Caragana korshinskii Shrubs in the Loess Hilly Region of China

Soil Moisture Dynamics and Its Temporal Stability under Different-Aged Caragana korshinskii Shrubs in the Loess Hilly Region of China

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