摘要
文章研究了红锥、黧蒴、荷木等6个树种的幼苗生物量、养分含量及其养分分布格局。结果表明:红桂木、灰木莲含水率最高,白花油茶其次,荷木、黧蒴次之,红锥最低;白花油茶和红桂木的叶养分含量为N>K>P,其他苗木的各个器官的养分含量均为K>N>P;各苗木N浓度为叶>根>枝干,P浓度为根>枝干>叶,各树种器官间的K浓度差异不大;6种苗木的养分贮量均为K>N>P,N贮量在不同器官的排序没有一定的规律,红锥、黧蒴、白花油茶枝干部分P贮量最高,荷木、灰木莲、红桂木根部P贮量最高,6种苗木均为叶片部分P贮量较少,荷木、红桂木根部K贮量最多,其余树种均为枝干部分K贮量最多。
The biomass, nutrient concentration and distribution patterns of nutrients in seedlings of six tree species were studied in this paper, such as Castanopsis hystrix, C. fissa, Schima superba, etc. The result showed as follows, among the six tree species, the dry weight rate of C. hystrix ranked the first level, with C. oleifera the second, S. superba and C. fissa the third, Artocarpus lingnanensis and Magnoliaceae glanca the last. The order of nutrient concentration in six species was K 〉 N 〉 P, except the leaves of C. oleifera and A. lingnanensis, which was N 〉 K 〉 P. The order of organs containing nitrogen concentration was leaves 〉 root 〉 branches, however, the organs containing phosphorus concentration were in turns of root 〉 branches 〉 leaves, and there was no significant difference in organs containing potassium concentration. The nutrient amount in total seedlings of six tree species was in turn of K 〉 N 〉 P. There were more phosphorus stored in branches of C. hystrix 、C. fissa, C. oleifera than other organs, but as for S. superba,M, glanca,A, lingnanensis, there were more phosphorus stored in their root than other organs, with few phosphorus stored in leaves of all six species. S. superba,A, lingnanensis had more potassium stocks in root than other organs, while other species had the largest potassium stocks in branches.
出处
《广东林业科技》
2010年第3期23-28,共6页
Forestry Science and Technology of Guangdong Province
基金
佛山市科技发展专项资金项目(2005020061)
关键词
阔叶树
幼苗
干重
养分含量
养分贮量
broad-leaved tree, seedlings, dry weight, nutrient concentration, nutrient amount
