五针白皮松濒危原因初步研究  

A Study on Endangered Causes of Pinus squamata

作　　者：陆素娟[1] 邓莉兰[1] 李乡旺[1] 

机构地区：[1]西南林学院

出　　处：《西北林学院学报》1999年第1期42-44,共3页Journal of Northwest Forestry University

基　　金：云南省自然科学基金

摘　　要：五针白皮松（Ｐｉｎｕｓｓｑｕａｍａｔａ）是一古老而濒危的树种，现仅存２０株。本文讨论了它的濒危原因：（１）干旱及间歇性干旱影响；（２）球果种鳞结构不利种子脱落；（３）种子产量少、质量低；（４）种子发芽势弱；（５）人为活动影响。Pinus squamata is an old and endangered species. There are only 20 trees now. The endangered causes of the species were discussed. They are 1) effects of drought and intermittent drought; 2) the structrue of cone is unfavorable for seed dropping; 3) output and quality of seed are lower; 4) germinative energy of seed is weak; 5) effects of people's activity

关 键 词：五针白皮松 濒危种 濒危原因 

分 类 号：S791.24[农业科学—林木遗传育种]