| 摘要: |
| 研究了观光木、女贞、山杜英、乳源木莲和乐昌含笑幼苗的养分积累和分布。结果表明: 观光木的各器官干重为根>叶>干，女贞为干>根>叶>枝，山杜英为枝>叶>根>干，乳源木莲为根>干>叶，乐昌含笑为叶>干>根>枝。各树种干的养分浓度最低。除了观光木外，其余树种均以叶的养分浓度为最高。一般来说，幼苗各器官的养分浓度为N>K>P。观光木的养分贮量为根>叶>干，女贞和山杜英为叶>枝>根>干，乳源木莲为叶和干>根，乐昌含笑为叶>干和根>枝。5种幼苗各器官的养分贮量多为N> K>P。 |
| 关键词: 阔叶幼苗 干重 养分浓度 养分贮量 |
| DOI： |
| 投稿时间：2007-01-30修订日期：2007-04-26 |
| 基金项目: |
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| Accumulation and Distribution of Nutrients in Seedlings of Three Broad-leaved Tree Species |
| Liang Ruiyou,Xu Songkui |
| () |
| Abstract: |
| Accumulation and distribution of nutrients were studied in seedlings of broad-leaved Tsoongiodendron odorum, Ligustrum lucidum, Elaeocarpus sylvestris, Manglietia yuyuanensis and Michelia chapensis tree species. The order of dry weight in various organs was roots> leaves>stem for T. odorum, stem>roots> leaves>branches for L. lucidum, branches>leaves>roots>stem for E. sylvestris, roots>stem>leaves for M. yuyuanensis and leaves>stem>roots>branches for M. chapensis. Nutrient concentrations were the lowest in stem and the highest in leaves except for T. odorum. Generally, the order of nutrient concentrations was N>K>P. The order of total amount of nutrients in various organs was roots>leaves>stem for T. odorum, leaves>branches >roots>stem for L. lucidum and E. sylvestris, leaves and stem >roots for M. yuyuanensis, and leaves>stem and roots>branches for M.chapensis. The amount of nutrients in the five seedlings was generally ranked in turn N>K>P. |
| Key words: broad-leaved seedling, dry weight, nutrient concentration, nutrient accumulation |
