摘要
通过2005年6和10月对元谋干热河谷地区新银合欢人工林的调查，发现新银合欢林下幼苗数量较多，经过对幼苗刨根后，发现林下的新银合欢幼苗均为种子实生苗，表明新银合欢是通过种子繁殖来完成天然更新。新银合欢单株结实量在602—1513粒，树体高大的结实量多；其林下幼苗生长良好，更新密度最低为368株·m^-2，最高达960株·m^-2；新银合欢林缘幼苗最远扩散距离为58．3m，幼苗的扩散范围主要集中在距离林缘10m的区域内，种子受风力和流水的影响，可以沿沟谷传播很远。
In this paper, an investigation was made on the Leucaena leucocephala plantations in Yuanmou dry-hot valley in June and October 2005. Under the plantations, there were a great many of seedlings, and all of them were generated from seeds, suggesting that L leucocephala could naturally regenerate from seed. The seed quantity per tree was from 602 to 1 513, and high trees had more seeds. The seedlings were growing well, with a minimum renewal density of 960 plants per square meter and a maximum renewal density of 960 plants per square meter. The longest dispersal distance of the seedlings was 58. 3 m from the edge of L leucocephala stand, and the dispersal range was mostly in an area 10 m from the stand. The seeds could be dispersed to a far distance along the valley by wind and running water.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第1期135-138,共4页
Chinese Journal of Ecology
基金
国家科技部社会公益研究专项资助项目(2002DIB50122)
关键词
新银合欢
干热河谷
天然更新
Leucaena leucocephala
dry-hot valley
natural regeneration.
