Vegetation recovery is one of the major measures to improve eco-environment of the Loess Plateau. In order to find the ecological effects of different vegetation recovery modes on soil moisture in this region, six trial sites in Ranjiagou were studied. The results showed that compared to farmland, the soil bulk density under the recovery modes of Platycladus orientalis, Vitex negundo var. heterophylla, 20-year Robinia pseudoacacia, 4-year Robinia pseudoacacia and 4-year Medicago sativa L declined dramatically with a percentage of8%-16%; total porosity, capillary porosity and non-capillary porosity apparently increased by 24.5%-8.1%, 1.2%-13.9% and 20.5%-90.0%; the water retention capability of soil increased by 33%-7.5%; the water supply capacity under the mode of Platycladus orientalis, Vitex negundo var. heterophylla and 4-year Robinia pseudoacacia were 2.16, 1.78 and 1.85 times of the farmland while the 20-year Robinia pseudoacacia mode and 4-year Medicago sativa L mode were 25% and 62.3% of the farmland; >0.25mm water stable aggregates were increased by 56.84%-30.72% by all the recovery modes compared to the farmland; the structure fragmentation rate of soil under all recovery modes was 16.2%-62.6% while in farmland it was as high as 41.09%. The correlation analysis indicated there was a significant correlation of soil bulk density, total porosity, water characteristic curve, water stable aggregates and structure fragmentation rate, so the conclusion could be drawn as every vegetation recovery mode has a better ecological effect on soil water than farmland except for the water supply capacity of 20-year Robinia pseudoacacia and 4-year Medicago sativa L.
ZHANG Xiao-pei, YANG Gai-he, HU Jiang-bo, WANG De-xiang
. Effect of Different Vegetation Recovery Modes on Soil Moisture Ecoeffects in Hilly and Gully Region of the Loess Plateau[J]. JOURNAL OF NATURAL RESOURCES, 2008
, 23(4)
: 635
-642
.
DOI: 10.11849/zrzyxb.2008.04.011
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