滇东南岩溶山地次生林土壤种子库储量与优势成分Storageand.PDFVIP

Guihaia 23 ( 6) : 528 - 532 2003 11 1 2 2 2 2 沈有信 , 陈胜国, 江 洁 , 蔡光丽, 张 平 ( 1. , 650223; 2., 663000 ) : , , , 10 cm 2 2 4 930~ 14 930 / m ,3 780 /m 10 cm , 0~ 22~ 55~ 10 cm , 5~ 10 cm , (85. 5% 69. 9%), ( 12. 8%19.4%) , ( 1. 6% 4.2%) ( 0. 6% 6. 5%) (Eupatorium adenop horum), (Ageratum conyzoides), ( Conyza stricta), (Emiliasonchfi olia), : ; ; ; ; : Q948 : A : 2003 Storage and dominants in soil seed banks under karst secondary forests in southeastern Yunnan 1 2 2 SH N Youxin , CH N Shengguo , JIANG Jie , 2 2 CAI Guangli , ZHANG Ping ( 1. Xishuangbanna Tropical Batonic Garden, CAS, Kunming 650223, China; 2. Agriculture School of enshanPref ecture, Wenshan 663000, China ) Abstract: The storage and dominants of viableseeds in soil seed banks of the typical karst secondary forests in south eastern Yunnan were studied by using greenhouse germination methods and transect soil sampling method. There were abundant viable seeds stored in thesoil seed banks under karst secondary forests. Seeds identified in soils at 10 2 2 cm depth ranged from 4 930 to 14 930 indi. / m , higher than that of 3 780 indi./ m under a contrast matured karst forest. Vertically, the number of seeds per soil unit dropped down gradually from 0~ 2 cm depth, 2~ 5 cm depth to 5~ 10 cm depth under secondary forests and matured for