基于人工降雨灌木纯林及柳湾林降雨再分配差异

doi:10.13866/j.azr.2025.03.09

Abstract

Abstract:

The natural mixed shrub forest in the Mu Us Sandy Land, also known as Willow Bay, is a unique type of shrub community in sandy regions. However, to date there has been limited research on precipitation dynamics in Willow Bay communities compared with that in pure forest stands, making it challenging to reveal differences in water competition between the two. This study focused on Salix psammophila and Hippophae rhamnoides pure forests as well as Willow Bay. Using artificial rainfall simulations, we simultaneously monitored the processes of rainfall redistribution in different forest stands and quantitatively analyzed the relationships between rainfall characteristics and redistribution. The results showed that the effective rainfall for S. psammophila, H. rhamnoides, and Willow Bay was 18.58 mm, 21.14 mm and 20.25 mm, accounting for approximately 85.46%, 97.24%, and 93.15% of the total+rainfall, respectively. Canopy interception losses were 3.15 mm, 0.60 mm and 1.49 mm, accounting for approximately 15.69%, 3.60% and 7.31% of the total rainfall, respectively. Significant differences were observed in the spatial distribution of throughfare among the three forest types. In Willow Bay, the spatial distribution of throughfare was more evenly divided into “rain extreme,” “drought extreme,” and “intermediate zones,” whereas the distributions in S. psammophila and H. rhamnoides pure forests were more uniform. The rainfall redistribution processes in all three forest types increased with greater rainfall amounts, but the changes tended to stabilize as the canopy interception capacity approached saturation. By combining the morphological and structural characteristics of S. psammophila and H. rhamnoides, Willow Bay demonstrated better stability under complex and variable environmental conditions, ensuring ecological balance and stability within the Willow Bay community.

Key words: willow bay, pure shrub forest, rainfall redistribution, simulated rainfall, Mu Us Sandy Land

ZHANG Junyao, HAN Qingchi, Alatengsuhe , WANG Haichao, CHEN Congyu, LI Hengkai, WANG Weilong, WANG Xinping, PEI Zhiyong. Differences in rainfall redistribution between pure shrub forests and willow bay based on artificial rainfall[J].Arid Zone Research, 2025, 42(3): 489-498.

Figures/Tables 11

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References 32

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树种	林龄	株高/m	冠幅/m	冠层投影面积/m²	基径/cm
沙柳1	3 a	1.51	0.76×0.89	0.68	0.78
沙柳2	3 a	1.56	0.85×0.87	0.74	0.90
沙柳3	3 a	1.04	0.86×0.90	0.77	0.90
沙棘1	4 a	1.45	0.76×0.72	0.55	3.10
沙棘2	4 a	1.31	0.73×0.78	0.57	2.20
沙棘3	4 a	1.52	0.61×0.72	0.43	2.70

林分	有效降雨量/mm	有效降雨量占比/%	穿透雨量/mm	穿透雨量占比/%	树干茎流量/mm	树干茎流量占比/%
沙柳纯林	18.58	85.46	16.91	91.01	1.67	8.99
沙棘纯林	21.14	97.24	19.48	92.15	1.66	7.85
柳湾林	20.25	93.15	18.15	89.63	2.10	10.37

Differences in rainfall redistribution between pure shrub forests and willow bay based on artificial rainfall

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