MAO Si-hui, XIE Ying-zhong, XU Dong-mei. Impact of Grassland Desertification on Vegetation and Soil Properties in Yanchi County of Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 34-39.
MAO Si-hui, XIE Ying-zhong, XU Dong-mei. Impact of Grassland Desertification on Vegetation and Soil Properties in Yanchi County of Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 34-39. DOI: 10.13961/j.cnki.stbctb.2014.01.060.
In combination of field investigation with laboratory analysis
changes of plant community and soil characteristics were studied under different degrees of desertification in Yanchi desertification grassland to investigate the responses of vegetation and soil to desertification. Vegetation composition changes with the increased degree of grassland desertification. Perennial species gradually gave place to psammophyte annuals. Diversity index increased from mild desertification to moderate desertification grasslands. From moderate to extreme desertification grasslands
diversity index first decreased and then increased
which shows that the stage of moderate desertification is an important turning point for changes in plant community characteristics. Soil water content
organic matter and nitrogen content were reduced with increased sandy desertification on grassland; available P and available K content were the highest in extreme desertification stage
and changes of pH value and salt content did not show an obvious trend.