Effetc s of Different Thinning Inten sity on the Undre story Diversity within Cupressus f unebris Low-efficiency Plan-tation
By 1-a in situ simulated experiment , we examined the short-term effect of 15%( T1) , 25%( T2), 35%( T3) , 50%( T4) and 0 ( CK) thinning on the understory ( shrub and herb ) diversities of 33-a low-efficiency Cupressus funebris planta-tion, located in Jingyang District of Deyang City , Sichuan Province .One year later , the species richness , density, biomass of understory increased slightly in all treatments .The species richness , Shannon-Wiener index , Simpson dominance index of shrub-and herb-layer were increased with thinning intensity , and the significant positive effects on diversity existed in T 3 and T4.Hence, the intense thinning could facilitate to increase the diversity of shrubs and herbs within low -efficiency C. funebris plantation .
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