Tree Growth and Litter Decomposition in a Mixed Plantation of Chinese Fir and Pleioblastus amarus
Tree growth,litter production and decomposition of a multi-storey mixed stand of Chinese fir ( Cunninghamia lanceolata) and Pleioblastus amarus,developed from thinning a 10-year-old pure Chinese fir stand and retaining understorey species P.amarus, were studied in this article.Treatment SJK ( thinning a pure Chinese fir stand to density 900 stems· hm-2 and retaining understorey species P.amarus to density 6000 stems· hm-2 ) could develop obvious multi -storey crown,it was in favor of cultivating Chinese fir big-diameter timber , provided extra bamboo products and improved tree growth.Multi-storey mixed stand of Chinese fir and P.amarus had good stand structure ,higher litter production and decomposition rate of P.amarus,and litter mixture had a positive effect on decomposition rate of Chinese fir litter.Turnover time of P.amarus and Chinese fir leaf litter in treatment SJK were 2.27 a and 3.86 a,respectively ,and the former was 580 d shorter than the latter.Turnover time of Chinese fir leaf litter in pure plantation (unthinned,current density 2075~2110 stems· hm-2) was 4.94 a,394 d longer than that in the mixed stand with treatment SJK.
Chinese firPleioblastus amarusmulti-storey mixed standgrowthlitterdecomposition
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