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Spatial and temporal variations of soil moisture in three types of agroforestry boundaries in the Loess Plateau, China

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Abstract

Agroforestry is a ubiquitous landscape on the slopes in Loess Plateau, where soil moisture is a limiting factor for plant growth and development. The spatial and temporal characteristics of soil moisture were studied in three types of agroforestry boundaries: forest-grassland, forest-cropland and shelterbelt-cropland. The result shows that soil moisture content decreased with soil depth increasing from the surface to 110 cm. Soil moisture content differed significantly among the three boundaries all in the rainy season (July–September), dry season (May–June) and spring (March–April). The horizontal distribution of soil moisture in different soil layers in the three types of boundaries showed different patterns with line form, wave form, scoop form or “W” form. The distance of edge influence (DEI) of soil moisture in different types of landscape boundaries was estimated by variance analysis and multiple comparisons. In dry season the DEI in 0–10 cm soil layer was 0.4 H (H, average height of trees), which ranged from 0.2 H in grassland or in cropland to 0.2 H in forest field for both forest-grassland and forest- cropland boundaries, and 0.7 H (ranged from 0.2 H in cropland to 0.5 H in forest field) for shelterbelt-cropland boundary. In rainy season the DEI at soil depth of 0–110 cm was 0.7 H for the three boundaries. The results indicated that agroforestry type should be carefully selected to maintain soil moisture in land management, especially in restoring degraded land in Loess Plateau.

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Correspondence to De-hui Zeng.

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Foundation project: This work is supported by the National Key Technologies R&D Program of China (No. 2006BAD03A0502) and the Major State Basic Research Development Program of China (No. 2002CB111506).

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You, Wz., Zeng, Dh., Liu, Mg. et al. Spatial and temporal variations of soil moisture in three types of agroforestry boundaries in the Loess Plateau, China. Journal of Forestry Research 21, 415–422 (2010). https://doi.org/10.1007/s11676-010-0091-2

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  • DOI: https://doi.org/10.1007/s11676-010-0091-2

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