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›› 1997, Vol. 33 ›› Issue (zk2): 139-142.

• 论文及研究报告 • 上一篇    下一篇

杉木人工林叶面积指数的变化

项文化 林柏 吴迂芳   

  1. 中南林学院 株洲412006;会同县林业局 会同418300
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1997-11-25 发布日期:1997-11-25

THE CHANGE PATTERN OF LEAF AREA INDEX (LAI) IN CHINESE FIR PLANTATlONS

Xiang Wenhua,Lin Bai,Wu Yufang   

  1. Central South Forestry College Zhuzhou 412006;Forestry Bureau of Huitong County Huitong 418300
  • Received:1900-01-01 Revised:1900-01-01 Online:1997-11-25 Published:1997-11-25

摘要: 研究了杉木中心产区和丘陵扩大栽培区中不同立地类型、不同密度、不同生育阶段杉木人工林叶面积指数的变化规律。结果表明:杉木人工林叶面积指数与年龄存在二次抛物线关系,林分年龄为19年时达到最大值。随林分密度增大叶面积指数增大,最终趋于一定数量水平。立地条件越好,叶面积指数越大。间伐对林木的生长量有着积极作用,叶面积指数能很快恢复到原有的数量水平。

关键词: 杉木, 叶面积指数, 立地类型, 密度

Abstract: Based on data from 92 permanent plots and 283 sample trees of Chinese fir,thechange pattern of LAI at different density,age and site type in two regions was ana-lyzed.The results showed that the relation between LAI and age can be expressed by the formula:LAI=—1.669+1.040a—0。027a2 and there was one point of LAI culmination at the age of 19.With increasing of stands density,LAl increases and ultimately reaches to a certain value.The better site type is,the higher LAI gets.Intermediate cutting has a positive effect on trees growth and LAI can restore as before in a specific time after intermediate cutting.

Key words: Chinese fir, Leaf area index (LAI), Site type, Density