河北坝上地区防护林土壤性质特征

doi:10.16843/j.sswc.2021.05.008

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Abstract [Background] As an important part of the Three Norths Forest Shelterbelt Program, the shelter forest in Bashang area of Hebei province is located in the transition zone from Inner Mongolia Plateau-Yanshan mountain-North China Plain, which is an important ecological barrier for Beijing and Tianjin, and plays an important role in desertification control and ecological environment restoration. In recent years, due to the degradation of Poplar Shelterbelts in different degrees, the local government began to re-select the tree species of the shelterbelt. This work is to study the differences of soil properties and the inherent relationship between soil properties of different types of shelterbelts in Bashang, Hebei.[Methods] Five plots with different vegetation types were selected, including Populus simonii, Ulmus pumila, Caragana korshinskii, Pinus sylvestris var. mongolica, and natural grassland. Three sampling points were set up in each plot, and soil samples of 0-160 cm were collected at 10 cm intervals. A total of 240 soil samples were obtained from 15 sampling points. The soil organic carbon was measured by the potassium dichromate outside heating method, the soil particle size distribution was measured by the laser diffraction method, and the soil bulk density was measured by ring knife method.[Results] 1) There were three types of soil texture (sand, loamy sand, and sandy loam) in the study area, and the sand content in the soil was 74.10±5.78%. 2) The soil bulk density of the 0 to 160 cm soil layers of the five different vegetation types was not significantly different, and the degree of improvement of the soil bulk density of the shelter forest was not notable. 3) The differences in the soil properties of various vegetation types mainly existed between P. sylvestris var. mongolica and natural grassland, in which the soil organic carbon content and sand content of P. sylvestris var. mongolica increased observably by 49.79% and 21.40% (P<0.05) compared with natural grassland, respectively, and the fractal dimension of soil particles was evidently lower than that of natural grassland (P<0.05). 4) the fractal dimension of soil particles was extremely significantly and positively correlated with the content of clay and silt (P<0.001), and that was opposed to the sand (P<0.001). 5) The content of clay was positively correlated with the bulk density (P<0.05).[Conclusions] Among the 4 different types of protective forests, the soil stability of P. sylvestris var. mongolica shelter forest was stronger, and the effect of improving soil properties was obvious. The fractal dimension of soil can be used as an important index to assess the difference of soil texture, and the change of clay content is an important reason for the change of soil properties.

Key words： shelterbelt vegetation types deep soil soil properties fractal dimension Hebei Bashang

Received: 25 March 2020

PACS:

S151.9

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	Articles by authors
	SHEN Hanyue
	WANG Minmin
	LIANG Xiaoyu
	XIN Zhongbao
	YAN Tengfei

Cite this article:

SHEN Hanyue,WANG Minmin,LIANG Xiaoyu, et al. Soil properties of shelterbelts in the Bashang area of Hebei province[J]. SSWC, 2021, 19(5): 63-71.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2021.05.008 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2021/V19/I5/63

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