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| N素指数施肥对格木、降香黄檀苗期生长的影响 |
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温小莹,黄芳芳,甘先华,张卫强,黄钰辉,许秀玉,郭乐东,周毅
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广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东省森林培育与保护利用重点实验室/广东省林业科学研究院
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| 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 |
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| 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 |
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WEN Xiaoying,HUANG Fangfang,GAN Xianhua,ZHANG Weiqiang,HUANG Yuhui,XU Xiuyu,GUO Yuedong and ZHOU Yi
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Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou
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| 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 |
