N素指数施肥对格木、降香黄檀苗期生长的影响  

N Exponential Fertilization on Seedling Growth of Erythrophleum fordii and Dalbergia odorifera

作　　者：温小莹[1] 黄芳芳[1] 甘先华[1] 张卫强[1] 黄钰辉[1] 许秀玉[1] 郭乐东[1] 周毅[1] WEN Xiaoying;HUANG Fangfang;GAN Xianhua;ZHANG Weiqiang;HUANG Yuhui;XU Xiuyu;GUO Ledong;ZHOU Yi(Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou, Guangdong 510520,China)

机构地区：[1]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,广东广州510520

出　　处：《林业与环境科学》2018年第6期1-7,共7页Forestry and Environmental Science

基　　金：广东省林业科技创新专项项目(2015KJCX029及2017KJCX011);林业科技创新平台运行补助项目(2017-LYPT-DW-066及2017-LYPT-DW-068)

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。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.

关 键 词：格木 降香黄檀 指数施肥 苗期 生长量 

分 类 号：S723.7[农业科学—林木遗传育种]