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不同造林模式下青钱柳的生长效应

2021-01-13黄林青

安徽农学通报 2021年24期

黄林青

摘 要:以青钱柳、杉木、福建柏混交林和纯林为研究对象,比较分析了不同造林模式和坡位对青钱柳的生长效应。结果表明:混交造林模式下,各树种的存活率较为接近,其中混交林的存活率较纯林的高;各种造林模式下,下坡位的林分蓄积量和单株平均材积均高于中坡和上坡,2类混交林对青钱柳平均胸径、树高、林分蓄积量、单株平均材积均有不同程度的促进作用。

关键词:造林模式;混交;青钱柳;生长效应

中图分类号 S727 文献标识码 A 文章编号 1007-7731(2021)24-0064-03

Growth Effects of Different Afforestation Models on Cyclocarya paliurus

HUANG Linqing

(Luoshan State Owned Forest Farm in Nan′an, Annan 362300, China)

Abstract: The mixed forest and pure forest of Cyclocarya paliurus, Cunninghamia lanceolata and Fujian cypress were studied, the effects of different afforestation modes and slope positions on the growth of Cyclocarya paliurus were compared and analyzed. The results showed that the survival rates of all tree species were close under the mixed afforestation mode, and the survival rates of mixed forest were higher than those of pure forest; The stand volume and average volume per plant on the upper slope under various afforestation modes were higher than those on the middle slope and the lower slope. The two types of mixed forests promoted the average DBH, tree height, stand volume and average volume per plant to varying degrees.

Key words: Afforestation model; Grow together; Cyclocarya paliurus; Growth effects

青钱柳(Cyclocarya paliurus)又称金钱柳、摇钱树,属胡桃科青钱柳属,是集观赏、药用材用于一体的多用途树种[1]。青钱柳是优良的造林绿化树种,民间长期以来有用其叶片制茶作为保健品使用的习惯[2]。属深根性树种,耐干旱,生长快,干形通直,材性好。杉木(Cunninghamia laceolata Hook)是我国特有的南方重要的用材树种[3],生产力高、材质好,在林业建设中的地位突出。福建柏(Fokienia hodginsii)属柏科福建柏属,其木材材质轻软,易加工,是建筑、雕刻、装饰等的优良用材[4]。

在林分尺度上,常用树种多样性来表示生物多样性[5],林分内树种越多,生物多样性越高,林分越稳定。为进一步实现青钱柳高效栽培,提高青钱柳林分功能,本研究通过比较不同造林模式下青钱柳的生长效应,分析了不同造林模式下青钱柳林木的生长势、平均单株材积生长、林分生物量,探讨适宜的青钱柳栽培模式。

1 材料与方法

1.1 试验地概况 试验地位于福建省南安罗山国有林场溪头工区14-020小班(24°50′N,118°16′E),海拔290~340m,坡度24°,坡向西南,坡位下部,土壤为红壤;林场地处亚热带季风区,全年无霜区达280d,年均降雨量在1800~2200mm。……

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