辽西北风沙地不同林草措施土壤水文效应研究

Abstract

Abstract: This paper took the agriculture and pasturage interlaced zone of the typical sandy land in northwestern Liaoning as the study area.With the wild grass ground being the reference,the change characteristics of the physical properties of the soil moisture within 0-100 cm soil layer, such as soil bulk density,porosity,water holding capacity and soil saturated hydraulic conductivity,were investigated for different types of land cover including the Pinus sylvestris var. mongolica land,poplar forest land,shrub land and artificial grassland.The results showed that the surface soil bulk density of the poplar forest land was the minimum,followed by shrub land, Pinus sylvestris var. mongolica,artificial grassland and wild grassland.The soil bulk density showed an increasing trend with the increase of soil layer depth.The soil capillary porosity showed a significant downward trend with the increase of soil depth and had a significant negative correlation with the soil bulk density ( p=-0.583^*, n=5).The soil water holding capacity under different vegetation restoration measures were different with a range of variation from 3 761.59 to 4 366.94 t·hm^-2,and the poplar forest land held the highest of 4 366.94 t·hm^-2 and the artificial grassland,the lowest of 4 055.34 t·hm^-2.The effective capacity of different vegetation restoration measures ranged from 1 315.50 to 2 047.62 t·hm^-2,among which the maximal is the poplar forest land and the minimum,the Pinus sylvestris var. mongolica.The ranking of the five types of sandy land on soil saturated hydraulic conductivity was as follows:shrub land(2.49 mm·min^-1)>artificial grassland(1.81 mm·min^-1)>wild grassland (1.73 mm·min^-1)> Pinus sylvestris var. mongolica land(1.61 mm·min^-1)>poplar forest land(1.44 mm·min^-1).With the increase of soil depth,the soil saturated hydraulic conductivity of artificial grassland and wild grassland was decreased first and then increased,while for the Pinus sylvestris var. mongolica,poplar forest land and shrub land,it was increased first and then decreased.The effect of forest restoration measures in Horqin Sandy Land is better than that of grassland and therefore the forest restoration measures should take the priority.

Key words: northwestern Liaoning Province, wind sandy land, hydrological effects, vegetation restoration measures

CLC Number:

P152.7⁺5

LV Gang, WANG Yun-ce, LI Ye-xin, WANG Ting, ZHAI Jing-xuan, WANG Lei. Hydrological effects of different forest and grass measures on the soil in wind sandy land of Northwestern Liaoning Province[J].干旱区地理, 2018, 41(2): 342-348.

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Hydrological effects of different forest and grass measures on the soil in wind sandy land of Northwestern Liaoning Province

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