应用生态学报2012，Vol.23Issue(4)：972-978,7.
毛红椿天然林种子雨、种子库与天然更新
Seed rain, soil seed bank, and natural regeneration of natural Toona ciliata var.pubescens forest
摘要
Abstract
Taking the natural Toona ciliata var. pubescens forest in the Jiujiangshan National Nature Reserve in Jiangxi Province of China as test object, an investigation was conducted on the seed rain, soil seed bank, and seedlings number in 2008-2011. The seed rain of the forest was dispersed from late October to the end of December. In 2010, the seed rain intensity in different sampling plots was in the order of Xiagongtang observatory (320. 3+23. 5 seeds · m-2) > Xiagongtang protection station (284.7±24. 2 seeds · m-2) > Daqiutian protection station (251. 6±24. 7 seeds · m-2) , and the quantity of the intact seeds in soil supplied for seed germination and regeneration was 222. 0, 34. 3 , and 22.6 seeds · m-2 , respectively. The seed bank reserves was affected by the seed production amount, bird feeding, and seed viability, etc. , of which, bird feeding was the prime factor for the substantial drop of the seed bank reserves. Due to the low resistance against storage and a large number of rot during storage, the seeds in soil could hardly be effectively stored beyond one month. The seedlings germinated in December were averagely less than 2 stands · m-2, and the soil seed reserves in the next January was the least (6. 7-11. 8 seeds · m-2) , with the germinated seedlings averagely 0.4-0. 6 stands · m-2 , which was consistent with the rare distribution of natural seedlings in the forest. It was concluded that the small seed rain reserves, low seed vigor of soil seed bank, and low seedling establishment were the important factors impacting the natural regeneration of T. ciliata var. pubescens.关键词
毛红椿/天然更新/种子雨/土壤种子库/种子萌发Key words
Toona ciliata var pubescens/ natural regeneration/ seed rain/ soil seed bank/ seed germination分类
农业科技引用本文复制引用
黄红兰,张露,廖承开..毛红椿天然林种子雨、种子库与天然更新[J].应用生态学报,2012,23(4):972-978,7.基金项目
江西省林业厅科技攻关项目(2000-1)和江西省研究生创新专项(YC09A064)资助. （2000-1）
