| 摘要: |
| 用氮素指数施肥法对格木（Erythrophleum fordii）、降香黄檀（Dalbergia odorifera）幼苗进行不同施氮量处理，结果表明，随着施氮量的增大，格木幼苗的苗高、地径以及根、茎、叶生物量和总生物量总体均呈先增后降的趋势；降香黄檀幼苗的苗高、茎生物量呈先增后降的趋势，地径及根、叶生物量和总生物量总体呈上升的趋势。根冠比随施氮量的增加而降低。综合分析苗高、地径和生物量3 个性状，确定格木、降香黄檀苗期的最佳总施N 量分别是1 000、5 000 mg/ 株。 |
| 关键词: 格木 降香黄檀 指数施肥 苗期 生长量 |
| DOI： |
| 投稿时间：2018-05-30修订日期：2018-07-03 |
| 基金项目:广东省林业科技创新专项项目“新丰江饮用水源地水源林构建关键技术研究与示范(2015KJCX029及2017KJCX011),林业科技创新平台运行补助项目“广东东江源森林生态系统国家定位观测研究站运行补助”(2017-LYPT-DW-066)及“广东南岭森林生态系统国家定位观测研究站运行补助”(2017-LYPT-DW-068)。 |
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| N Exponential Fertilization on Seedling Growth of Erythrophleum fordii and Dalbergia odorifera |
| WEN Xiaoying,HUANG Fangfang,GAN Xianhua,ZHANG Weiqiang,HUANG Yuhui,XU Xiuyu,GUO Yuedong,ZHOU Yi |
| (Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou) |
| Abstract: |
| We grew seedlings of Erythrophleum fordii and Dalbergia odorifera under different nitrogen treatments using N exponential fertilization. Results showed that the seedling height, ground diameter, biomass of root, shoot and leaf, and total biomass of E. fordii all changed in a hump-shaped pattern along the nitrogen addition concentration. In contrast, the seedling height, shoot biomass of D. odorifera changed in hump-shaped pattern, with ground diameter, biomass of root and leaf, and total biomass increased along nitrogen treatment. Root-shoot ratio of both species decreased along nitrogen treatment. Combining the results of seedling height, ground diameter and biomass, we suggested that the optimal nitrogen concentrations promoting seedling growth were 1 000 and 5 000 mg for E. fordii and D. odorifera, respectively. |
| Key words: Erythrophleum fordii Dalbergia odorifera N exponential fertilization seedling stage growth |
