摘要
研究了太白红杉种群的年龄结构、生殖年龄结构、生殖力和生殖值,分析了太白红杉种群的生殖适合度和生殖对策.结果如下: 1 北坡和南坡两个种群的低龄级个体数都非常少,种群间的生育力差异不显著 P>0.05 ,但北坡太白红杉的生殖年龄比南坡大,平均生殖时间比南坡长,平均寿命也比南坡长. 2 北坡各龄级的生殖值比南坡高,剩余生殖值随年龄下降的速度比南坡小,北坡的生殖适合度比南坡高. 3 北坡第 ～ 龄级的剩余生殖值比南坡高,第 龄级后由于下降速度较快,其值要比南坡小.
The age structure,reproductive age structure,fecundity and reproductive value of Larix chinensis were studied,the reproductive fitness and the reproductive strategy were analyzed in this paper.The results indicated that (1) The number of lower age class is little in both south slope and north slope.The difference of fecundity in two populations is not significant,but the reproductive age is older in north slope,so does the time of average reproduction and life span.(2) The reproductive value of north slope is higher than south slope,and the reproductive fitness is also higher in north slope.(3)Before Ⅶ age class the RRV is higher in north slope,but the speed of descending with the age is faster in south slope.
出处
《西北植物学报》
CAS
CSCD
2003年第12期2089-2093,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金资助项目 (30070083)
陕西师范大学重点科研项目 (200024 )
关键词
太白红杉
生殖生态
生殖年龄
生殖值
生殖对策
Larix chinensis
reproductive ecology
reproductive age
reproductive value
reproductive strategy
