Physiological Responses of Alnus formosana and Alnus cremastogyme Nursery Stocks of the Different Provenances to Water Stress Climatically and Ecologically Adaptive Regions for the Introduction of Alnus formosana Seasonal Dynamics of Soil Microbial Biomass Carbon in Alnus formosana Forest-Grass Compound Models Study on the photosynthetic characteristics of introduced Alnus formosana Fine Root Biomass and Morphology of Alnus formosana in Silvopasture Systems Effects of fertilization on Alnus formosana fine root morphological characteristics, biomass and issue content of C, N under A. formosana-Hemarthria compressa compound mode Effects of light regime on the growth and photosynthetic characteristics of Alnus formosana and A. cremastogyne seedlings.