Growth Characteristics of Switchgrass in Mu Us Sandy Land of Northern Shaanxi
The adaptability evaluation of switchgrass(Panicum virgatum)was assessed to establish a foundation for selecting switchgrass varieties in the Mu Us Sandy Land of northern Shaanxi.A comprehensive evaluation system was established by observing the agronomic traits(plant height,tiller number,leaf area,biomass,seedling emergence rate),physiological characteristics(transpiration rate,net photosynthetic rate),and soil physical properties(water content,bulk weight,porosity)of 12 switchgrass varieties.This system adopted the principal component analysis method to assess the adaptability of switchgrass.There were significant differences in the indicators of plant height,number of tillers,leaf area,biomass and seedling emergence rate among the 12 species of switchgrass.Specifically,the plant height and leaf area of YM-9 were 115 cm and 59.20 cm2,respectively,the number of tillers of YM-2 was 93,the biomass of YM-6 was 153.98 g/cm2,and the seedling emergence rate of YM-5 was 48.50％.These varieties showed significantly superior indicators compared to the other varieties.The following correlations were observed.A significant negative correlation between soil bulk weight and plant height and soil porosity,with a correlation coefficient over 0.65;a highly significant positive correlation between yield and seedling emergence rate,with a correlation coefficient of 0.82;a significant positive correlation between yield and biomass,with a correlation coefficient of 0.63;and a highly significant positive correlation between transpiration rate of plant leaves and net photosynthetic rate,with a correlation coefficient of 0.88.YM-2 achieved the highest composite score(1.144)and was identified as most suitable switchgrass variety for large-scale cultivation in the Mu Us Sandy Land of northern Shaanxi among the 12 switchgrass varieties.
Mu Us Sandy Landswitchgrassvariety screeningintroductionenvironmental adaptation
NETL
NSTL
万方数据
