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| DOI：10.13522/j.cnki.ggps.2025180 |
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| Effects of types of planted forests on soil water infiltration in the Pisha sandstone region |
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ZHANG Yujia, YANG Zhenqi, GUO Jianying, LI Long, FAN Dong
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1. Institute of Water Resources for Pastoral Area, Ministry of Water Resources, Hohhot 010200, China;
2. College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
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| Abstract: |
| 【Objective】The ability of soil to infiltrate water is a critical parameter affecting vegetation restoration and soil conservation; it varies with different biotic and abiotic factors. This paper investigates the effect of different planted forest types on soil water infiltration and its influencing factors in a Pisha sandstone region.【Method】The double-ring infiltration method was used to measure water infiltration in soils with four types of plantations: Armeniaca sibirica, Caragana korshinskii, Pinus tabulaeformis, Hippophae rhamnoides, in a Pisha sandstone area. The control was water infiltration in a natural grassland in the same area (CK). Physical and chemical soil properties in each plantation and the control were measured to assess their influence on water infiltration. The temporal infiltration process in all experiments was simulated by the Kostiakov model, the Philip model, an empirical model and the Horton model.【Result】① There were significant differences in soil bulk density, soil water content, organic matter content, saturated hydraulic conductivity and soil texture between different plantations. Soils planted with Caragana korshinskii showed the highest initial soil water content (23.89%), organic matter content (21.57 g/kg) and saturated hydraulic conductivity (2.39 mm/min), and the lowest bulk soil density (1.13 g/cm3). ② Temporally, infiltration rate decreased asymptotically as time elapsed. The effect of plantations on water infiltration rate in the early stage was ranked as follows: Hippophae rhamnoides＞Caragana korshinskii＞Pinus tabulaeformis＞Armeniaca sibirica＞CK, while the stabilized water infiltration rate was ranked in the order of Caragana korshinskii＞Hippophae rhamnoides＞Pinus tabulaeformis＞Armeniaca sibirica＞CK. ③ Among the four models we compared, the Horton model was the most accurate in describing the change in infiltration rate with time both during early and late stages of infiltration in all treatments. ④ Correlation analysis showed that soil bulk density, organic matter and sand content were negatively correlated with the infiltration rate (p＜0.01), while soil water content was positively correlated with the infiltration rates (p＜0.01-0.05).【Conclusion】Soils planted with Caragana korshinskii enhanced soil water infiltration in the Pisha sandstone area. The Horton model was most accurate for simulating water infiltration in natural grassland and the four planted forests in the Pisha sandstone region. |
| Key words: Pisha sandstone area; soil infiltration; soil physical and chemical properties; model; mantel-test correlation heat map |
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