Changes in Vegetation and Soil Properties Among Sand Fixation Forest Belts With Different Belt Spacing
In Aohan Banner sandy area of Horqin Sandland,through evaluating the influence of low coverage sand-fixing forest with different belt spacing on soil and vegetation,a more suitable interzone vegetation restora-tion and soil development configuration structure model was proposed to provide scientific basis for artificial af-forestation in Horqin Sandland.The diversity of vegetation communities,soil physical and chemical properties and their correlation among three types of Chifeng poplar sand fixation forests with different spacing were stud-ied.Result shows:that the vegetation and soil recovery between the rows of sand-fixing forests of Chifeng poplar with different band spacings have obvious effects,and the vegetation recovery and soil recovery are complementa-ry.①In the three kinds of row-type sand fixation forests with different band spacings,with the increase of band spacing,the species diversity of inter-band vegetation showed an increasing trend,and the trend of the diversity index of each species was as follows:band spacing 25m＞16m＞10m＞equal spacing of control samples;②Soil water content,porosity and soil nutrient(organic carbon,alkaline dissolved nitrogen,quick-acting phosphorus and quick-acting potassium)content were as follows:band spacing 25m＞16m＞10m＞equal spacing of control sam-ples.The soil water content,porosity and soil nutrient content(organic carbon,alkaline nitrogen,quick phosphor-us and quick potassium)were as follows:25m between bands＞16m＞10m＞equal spacing between bands;soil bulk density was as follows:25m between bands＜16m＜10m＜equal spacing between bands;③In different spac-ing of Chifeng poplar sand fixation forests,the development of the soil and the recovery of the vegetation were mutually promoted,and the correlation between species diversity indices and the various physicochemical proper-ties of the soil was significant(P＜0.05)or highly significant(P＜0.01)to different extents.The size of the band spacing of two rows and one band of Chifeng poplar sand fixation forest has obvious influence on the physical and chemical properties of the soil and vegetation recovery between the bands,and increasing the band spacing can effectively promote the development of the soil and the growth of vegetation between the bands.It is consid-ered that the band spacing of 25m is more favorable to the development of the soil and the growth of herbaceous vegetation between the bands through the research of this paper.
Horqin sandlandlow cover sand fixation forestvegetation diversitysoil physical and chemical properties
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