林业科学2001，Vol.37Issue(2)：36-41,6.
中国特有植物四合木种群的生殖生态特征——种群生殖值及生殖分配研究
THE CHARACTERISTICS OF REPRODUCTIVE ECOLOGY OF ENDEMIC SPECIES TETRAENA MONGOLICA POPULATION IN CHINA——Reproductive Value and Reproductive Allocation
徐庆 1刘世荣 1臧润国 1郭泉水 1郝玉光2
作者信息
- 1. 中国林业科学研究院森林生态环境与保护所
- 2. 中国林业科学研究院沙漠林业实验中心
- 折叠
摘要
Abstract
In this paper, the reproductive value and reproductive allocation of Tetraena mongolica were studied. The results showed that the curve of reproductive value ( Vx ) with increasing age tended to be low-high-low pattern. The change pattern of Vx in the age of 3～9,10～21, and older than 21 years was in the state of slow increase, rapid increase, and slow decrease respectively. The reproductive value was controlled by both the selective pressure of environment ( Kx ) and its own survival rate ( Lx ). The reproductive allocation value ( RA ) changed with the reproductive phase of T. Mongolica. RA decreased from the stage of flowering to frutiting. RA value increased with the age in the period of 4～21 years and decreased after 21 years. According to the relationship between reproductive age and reproductive allocation, the reproductive phase of the population could be divided into 4 stages:initial (less than 9 years old), increment (from 9～12 years old), peak (13～27 years old), and decline reproductive phase (older than 27 years old).关键词
四合木种群/生殖值/生殖分配分类
农业科技引用本文复制引用
徐庆,刘世荣,臧润国,郭泉水,郝玉光..中国特有植物四合木种群的生殖生态特征——种群生殖值及生殖分配研究[J].林业科学,2001,37(2):36-41,6.
