摘要
通过对三江源自然保护区青海云杉在不同育苗密度下生长状况的试验调查,以及经济效益的分析,结果表明:3 a生原床苗在密度为600万株/hm2时生长状况最佳,密度为900万株/hm2时经济效益最佳;6 a生移植苗在密度为180万株/hm2时生长状况最佳,密度为240万株/hm2时经济效益最佳。
Through the experiment investigation to growth condition at different seedling density for Spruce Picea Crassifolia in Sanjiangyuan Nature Reserve and through analysis to econmic bencfits,the results show that：for 3 a former seedbed,its growth condition is the best one when at the density of 6 million trees/hm^2,and its density economic benefit is the best one when at the density of 9 million trees/hm^2; for 6 a transplant,its growth condition is the best one when at the density of 1.8 million trees/hm^2,and its economic benefit is the best one when at the density of 2.4 millon trees/hm^2.
出处
《中南林业调查规划》
2007年第3期62-64,共3页
Central South Forest Inventory and Planning
关键词
青海云杉
育苗
经济效益
Sprece Picea Crassifolia
seedling
economic benefit
