摘要
对胡桃楸、水曲柳和黄菠萝叶出生和死亡过程的分析表明，它们的叶出生是一个渐进过程，持续期可达４０～６５ｄ，不同时期出生的叶可形成明显的龄级结构．小叶生长过程基本上呈Ｓ型．叶死亡过程可分为小叶和复叶两种情况，初期落叶以小叶为主，凋落量少、速度慢；而后整个复叶才开始凋落，使落叶数量和速度加快，整个落叶期仅在３０～３５ｄ左右．小叶凋落过程属于ＤｅｅｖｅｙⅠ型存活曲线，复叶凋落过程基本符合ＤｅｅｖｅｙⅡ型存活曲线．
he analysis on the process of
leaf birth and death of Juglans mandshurica, Fraxinus mandshurica and Phellodendron
amurense shows that the birth of their leaves was a gradual process, with a duration of 40～
60 days. The leaves born in different periods formed a distinct age class structure. The growth
process of leaflet basically revealed an S type curve. The death of leaves was distinguished
into leaflet, with little litterfall and slow speed. Then, the compound leaves began to fall, and the
quantity of defoliation increased and the speed quickened. The whole defoliation continued for
30～35 days. The process of leaflet fall was a Deevey Type I survival curve, and the compound
leaves, a Type Ⅱ.
出处
《应用生态学报》
CAS
CSCD
1999年第4期392-394,共3页
Chinese Journal of Applied Ecology
关键词
种群
叶数量
生死过程
生长
凋落
存活曲线
Population, Leaf demography, Birth and death process, Growth,
Litterfall, Survival curve.
