Studies On The Adaptability Of Gymnocarpos Przewalskii In Typical Habitats

the species diversity,population dynamics and spatial distribution pattern,annual climatology,physiological indicators and soil indices of the three populations in the Yabulai area of Alashanyouqi,Inner Mongolia were studied to analyze the Gymnocarpos prieuxilskii in different habitats in this paper.The differences between Gvmnocarpos przewalskii populations were explored and the causes of vegetation and the growth of vegetation in arid regions.The main research results are as follows:1.There are 24 main plants in the bare fruit community under three habitats in the Yabulai area,belonging to 13 families and 23 genera;the herbaceous plants are dominated by annual herb,and the shrub layer is dominated by the population of Gymnocarpos przewalskii and cat heads.The study area is a desert community with Gymnocarpos przewalskii as a eroup.The density index of the Gymnocarpos przewalskii in the three habitats was ranked by the size:WZR plot was 4.182>ZBS plot was 3.868>MHG plot was 3.796.2.The Gymnocarpos prze,alskii population is declining in different habitats in Yabuli.Due to the lack of young plants in the population,the population is not capable of renewing,and it is predicted to be in a recession trend in the next 2 and 4 years.The populations of Gymnocarpos przewalskii in the three habitats belonged to the aggregation distribution,and the degree of aggregation was different.The negative binomial parameters?K?were in order:pre-mountain alluvial fan habitat?-17.3280?>dry river bed habitat?-20.8657?>gravel Gobi beach habitat?-23.0521?.3.The Gymnocarpos przewalskii ring structure in the three habitats of Yabulai is suitable for annual climatology research.According to the response of the annual ring width to meteorological factors,there are 6 main climatic factors affecting the growth and development of the Gymnocarpos przewalskii population in the area.The order of size is the annual average temperature>the average temperature of the growing season>the annual precipit4.The physiological indexes related to drought resistance of three habitats of Gymnocarpus przewalskii were measured,and the results showed that with different water conditions?soil moisture content or annual rainfall,drought gradient changes?.the Malondialdehyde content of Gymnocarpus przewalskii increased,ZBS plot was 1953 ?mol·g^-1>MHG plot was 1951 ? mol·g^-1>WZR plot was 1854 u mol·g^-1?the different enzymes activity and osmotic regulation substances Proline ZBS plot 26.96 ?g·g^-1>WZR plot was 22.25 ? g·g^-1>MHG plot was 28.12 ?g·g^-1?Soluble protein ZBS plot was 74.52mg·g^-1>MHG plot was 67.7572mg·g^-1>WZR plot was 53.0368mg·g^-1?Soluble sugar ZBS plot was 5.2%>MHG plot was 4.6%>WZR plot was 2.8%will increase,improve the plant resistance to adverse environment.