中文摘要：

毛红椿（Toona ciliata var.pubescens）为楝科（Meliaceae）香椿属植物,美誉＂中国桃花心木＂,属国家二级保护濒危物种（傅立国,1991）。我国江西、湖南、湖北、安徽、广东、广西、四川、贵州、海南、浙江和云南等省（区）有其天然林分布,但资源总量少,

英文摘要：

In this paper we investigated the population fruiting characteristics and fecundity of Toona ciliata var. pubescens, an endangered plant species, in Jiulianshan National Nature Reserve in Jiangxi province. The results showed that there existed onand off-year phenomenon in fruiting with 1 year interval. The fruit setting rate was generally low in a natural pollination. Seed yields in a given fruiting year were affected by environmental conditions and climate. During the on-year of 2010, the seed yield was about 700 g per plant, with an annual average of fruit-setting rate, number of cones per flowering branch, number of seeds per cone, and seed-setting rate for 8.91%, 22.91, 29.55, and 12.01%, respectively.The net reproductive rate, intrinsic increase rate, finite increase rate and generation span of T. ciliata var. pubescens population was 0.038 4, -0.078, 0.854 6, and 41.74 a, respectively. The fruiting and sexual fecundity characteristics showed that the T. ciliata var. pubescens populations were subjected to reproductive constraints of the less fruit-setting with many flowers in a natural pollination and a lower environmental fit together, thus the natural population would tend to a slow negative growth.