Gray Relational Analysis on Natural Regeneration of Rare and Endangered Species Cephalotaxus mannii Hookfand Environment Factors

Abstract

Abstract: Using gray relational system theory and method,the effects of environment factors on the survival rate,the increasing height and the increasing height ratio of seedling populations of Cephalotaxus mannii in Hainan island were analysed based on the observed data of 1996 to 2005.The results showed that temperature and soil of habitats were the most important environment factors for the natural regeneration of seedlings of C.mannii. The most significant influential environmental factors which respectively affected the survival rate and the increasing height of seedlings of C.mannii were annual highest temperature and annual lowest temperature.Thickness and moisture of soil also expressed great effects on the growth of seedlings of C.mannii.Therefore,temperature and soil in the environment factors should be paid much more attention during protecting C. mannii in wild in order to increase seedling survival rate and improve plant growth conditions.

Key words: Cephalotaxus mannii Hookf, natural regeneration, environment factors, gray relational system

CLC Number:

S711
S754.1

DAI Zhicong, QI Shanshan, XING Xuhuang, YANG DonghuaSONG Jingyuan, DU Daolin, YANG Xiaocheng. Gray Relational Analysis on Natural Regeneration of Rare and Endangered Species Cephalotaxus mannii Hookfand Environment Factors[J]. FOREST RESOURCES WANAGEMENT, 2010, (2): 50-56.

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