不同立地管理措施对2代杉木1年生幼林生长影响的研究

关于现有人工林的地力衰退问题，在世界林学界范围内已得到基本一致的认同，但也有持不同意见者，有的将２代人工林的多种表现称之为“第２代效应”，包括品种改良和施肥等措施可能产生的积极影响以及常规措施导致的负面影响在内，造成认识不同的原因在于试验的方法和数据...

IMPACT OF SITE MANAGEMENT ON PRODUCTIVITY OF SECOND GENERATION 1-YEAR-OLD PLANTATION OF CHINESE FIR

Experiment was established to study the impacts of site management on productivity of multiple generation plantations of Chinese fir.Five treatments(site management schemes) were applied at the harvested site of the first generation of Chinese fir plantation.The second generation plantation was established at the harvested site and observations were made one year after plantation.Results indicated that:(1)BL 3BM 0 was the most favorable treatment for the growth of Chinese fir and most unfavorable for the ground vegetation.The Chinese fir with treatments BL 2BM 0 and BL 2BM 1 had similar growth to each other,indicating that clearance burning had no significant effect on the growth of Chinese fir for the first year,but the burning significantly reduced the biomass production of the ground vegetation.(2)The total biomass production of one year old Chinese fir stand varied with treatments in a same way as the biomass production of the ground vegetation.The biomass of ground vegetation was prominent in the total biomass production of 1 year old Chinese fir stand.