摘要
随着兴安落叶松人工林的林龄不同,林下小生境也随之变化.从而,导致了林下植被的演替.30多年来,通过对落叶松人工林下层植被演替的定位研究表明:随着林龄的增加,林分郁闭度加大,原次生林下的草本植物在种类、盖度、高度和多度上相对减少,而阴性杂草增加;当落叶松人工林实行皆伐作业后,阳性杂草又随之大量侵入.鉴于林下植被演替的这一特点,营造落叶松人工林后应及时进行间伐透光,为草木植物的生长发育创造有利条件,有利于土壤改良和水土保持.
With the increase in stand age. the micro-environment under the forest waschanged. and the undergrowth succession occured consequently. More than 30years of research proved that, with the increase in stand age and canopy density,herbs pre-occured in the natural sencondary forest diminished in speciescomposition, coverage, height, and abundance. But, shade-demanding grassesflourished. When clear-cutting system was employed the the larch plantations.light-demanding grasses recurred abundantly. The study results are ofimportance to the practice and theory of forest management.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1996年第5期82-86,共5页
Journal of Northeast Forestry University
关键词
落叶松
人工林
下层植被
Larch
Plantation
Undergrowth
Succession
