不同密度大叶相思林生长分析  

Growth Analysis of Acacia Auriculaeformis Stands with Different Densities

作　　者：郑欣颖[1] 薛立[1] 

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642

出　　处：《绿色科技》2017年第7期7-8,13,共3页Journal of Green Science and Technology

基　　金：中央财政林业科技推广示范项目(编号:2015-GDTK-07)

摘　　要：对密度为1667(低密度)、4444(中密度)、10000(高密度)株/hm2的4年生大叶相思林的生长状况进行了研究。结果表明:高密度、中密度和低密度大叶相思林的平均胸径分别为5.14cm、5.00cm和6.24cm,平均树高分别为7.82m、6.73m、6.41m,平均冠幅分别为2.01m、1.81m、2.47m。中密度与高密度大叶相思林的胸径差异不显著,但显著小于低密度大叶相思林。中密度与低密度大叶相思林的树高差异不显著,但显著小于高密度大叶相思林。密度对其冠幅的影响并未表现出明显的规律。总体看来,在高密度的环境里大叶相思采用快速的高生长策略,而在低密度的环境里首先发展胸径生长。The growth were studied in Acacia auriculaeformis stands with 1667 （low--density）, 4444 （middle--den- sity） and 10000 （high--density） trees/hm2. The results showed that mean diameter at breast height （DBH） of high --, middle-- and low--density stands were 5.14, 5.00 and 6.24 era. Their mean tree height was respectively 7.82, 6.73 and 6.41 m. Their mean crown width was 2.01, 1.81 and 2.47 m. There was no significant difference in DBH between medium density and high density, but significantly lower than that of low density. The influence of density on crown has shown obvious regularity. Overall, Acacia auriculaeformis grew with a fast height growth strategy in the high--density stand while with a fast diameter growth strategy in the low--density stand.

关 键 词：大叶相思 密度 生长 

分 类 号：S792[农业科学—林木遗传育种]