Response of Hydrological Effects to Density Control of Pinus tabulaeformis Plantation in Mountainous Area of North Hebei
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Abstract:
Stand density imposed the large effects on forest hydrological effects. Based on vegetation layer, litter layer and soil layer of different intensities Pinus tabulaeformis plantation in mountainous area of north Hebei province, forest hydrological effects was studied. Results showed that: 1) canopy interception reduced with the decreasing intensity, but the undergrowth vegetation interception raised with the decreasing intensity, 2) litter water retention reduced with the decreasing intensity, litter water retentions of the three plots with stand density of 1584 trees?hm-2, 864 trees?hm-2 and 684 trees?hm-2 had smaller disparities, but accounted for 155.66%, 149.58% and 142.25% of the sample stand with 388 trees?hm-2 ; 3) soil water-holding ability raised with the increasing stand density, plots with stand density of 1584 trees?hm-2, 864 trees?hm-2 and 684 trees?hm-2 accounted for 103.79%, 113.88%, 114.02% of the sample stand with 1584 trees?hm-2. Soil-water storage capacity of sample 864 trees?hm-2 and 684 trees?hm-2 plot were close to each other. Pinus tabulaeformis platation thinning reasonably could improve forest water conservation.