林业科学2011，Vol.47Issue(6)：23-29,7.
林窗与凋落物对人工云杉林早期更新的影响
Effects of Forest Gaps and Litter on the Early Regeneration of Picea asperata Plantations
摘要
Abstract
Forest gaps and litter are two important factors which have influence on forest regeneration. Forest gaps(40 m ) were artificially created in spruce plantations in Miyaluo, Western Sichuan. In this paper, changes in environmental factors were monitored, and germination and survival of the seedlings were measured to test the effects of natural seeding and artificial seeding, as well as wiping out litter on germination and growth of seedlings. This paper also determined the effects of plantation litter aqueous extracts on germination and seedling growth. Our main purpose is to investigate the effects of forest gaps and litter on germination and survival of seedlings, which would lend evidence to clarify the effects of forest gaps and litter on plantation regeneration, explore the factors which influence regeneration of spruce plantations and provide scientific evidence for sustainable management of alpine plantations. The results showed that: 1) the environment in the forest gap was heterogeneous; 2) forest gaps and seeding treatments had effects on both germination and survival of seedlings. For natural seeding and artificial seeding without litter, germination was highest in the center of a gap, which had 2. 75 seedling-m'2 and 21. 25 seedling-m"2 respectively, while for artificial seeding, the highest germination was in the edge of a forest gap, which had 10. 75 seedling-m"2. Seedling mortality was slightly lower in the area surrounding the center of a gap. Natural seeding had the lowest number of germination, while artificial seeding without litter had the highest. 3 ) Plantation litter aqueous extracts had significant negative effects on germination and seedling growth of Picea asperata, and the inhibition of root length and shoot length were 68.62% and 66.39% , respectively. Based on the results, it was concluded that; forest gaps were beneficial to forest regeneration; artificial seeding could be used to promote regeneration; litter had negative effects on regeneration of spruce plantations.关键词
人工云杉林/林窗/凋落物/环境因子/种子萌发/幼苗死亡率Key words
spruce plantation/ forest gap/ litter/ environmental factor/ germination/ seedling mortality分类
农业科技引用本文复制引用
胡蓉,林波,刘庆..林窗与凋落物对人工云杉林早期更新的影响[J].林业科学,2011,47(6):23-29,7.基金项目
国家自然科学基金项目(30800161)、国家自然科学基金重点项目(30530630)、中国科学院知识创新工程“西部行动计划”项目(KZCX2-XB2-02)、中国科学院知识创新工程重要方向项目(KSCX2-YW-N-066-03)和“西部之光”人才计划“西部博士项目”. （30800161）
