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Inner Mongolia Agricultural University (2019)

Study on Nitraria Sphaerocarpa Shrub Sandpile Characteristics of Different Disturbance Degrees in Bayingwendur Desert

郭向东;

Titre : Study on Nitraria Sphaerocarpa Shrub Sandpile Characteristics of Different Disturbance Degrees in Bayingwendur Desert

Auteur : 郭向东;

Grade : Master’s Theses 2019

Université : Inner Mongolia Agricultural University

Résumé
Nitraria Sphaerocarpa shrub sandpile characteristics,distribution pattern and surface soil particle size characteristics of shrub sandpile were analyzed in different disturbance:the natural state(about 0 camel/hm2),the light disturbance(about 0.6 camel/hm2)and the intermediate disturbance(about 1 camel/hm2),in the Bayinwendur Desert.Found influence of disturbance degree to them,the ecological protection measures were vital to Nitraria Sphaerocarpa community in the Bayinwendur Desert,the conclusions are as follows :(1)The spatial distribution pattern of cone white shrub shrubs has obvious trend:in moderately disturbed communities,cones of white cones are clustered at 3-4m and 19-25m,others are randomly distributed ;In the community,the cones of the cones were clustered at 12-13m,and the others were randomly distributed.Under natural conditions,the distribution of cones was randomly distributed.(2)From spatial distribution pattern of Nitraria Sphaerocarpa shrubs sandpile,the R2 of horizontal scale and height of sandpile respectively is 0.4605,0.4656 and 0.5369,when the disturbance degrees is down(the intermediate disturbance to the natural state).As height and horizontal scale of sandpile increase gradually,the development of sandpile is getting better.(3)From the surface particle size characteristics of Nitraria Sphaerocarpa shrubs sandpile with the disturbance degrees down(the intermediate disturbance to the natural state),the average particle size of Nitraria Sphaerocarpa shrubs is increasing(221.3 μm,243.7μm 268.1 μm).The very fine gravel of different disturbances is distributed in the each direction bottom and shrub communities.In the natural state,the very fine sand is the main component of sandpile,and the others are medium sand and fine sand ;with disturbance degrees,the very fine sand is the main component,the other is fine sand.(4)Mild disturbance(0.6 camel/ha)has a certain adverse effect on the cone white thorn community,so it is recommended to control the grazing camel below 0.6 peak camel/ha.

Mots clés : Nitraria Sphaerocarpa; Spatial pattern; Shrub morphology; Particle Size distribution;

Présentation (CNKI)

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