文献类型：期刊文献

中文题名：Growth and nutrient dynamics of Betula alnoides seedlings under exponential fertilization

英文题名：Growth and nutrient dynamics of Betula alnoides seedlings under exponential fertilization

作者：Lin Chen[1,2] Chunsheng Wang[2] Bernard Dell[3] Zhigang Zhao[2] Junjie Guo[2] Daping Xu[2] Jie Zeng[2]

机构：[1]The Experimental Center of Tropical Forestry, Chinese Academy of Forestry;[2]Research Institute of Tropical Forestry, Chinese Academy of Forestry;[3]Division of Research and Development, Murdoch University

年份：2018

卷号：29

期号：1

起止页码：111-119

中文期刊名：林业研究：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2017_2018】；

基金：financially supported by The Ministry of Science and Technology,China(2012BAD21B0102)

语种：英文

中文关键词：动力学;幼苗;授精;生长;滋养;微型元件;P2O5;营养素

外文关键词：Betula alnoides;Growth performance;Luxury nutrient consumption;Nitrogen requirement;Vector analysis

分类号：S512.101;O313

摘要：Betula alnoides is a fast-growing hardwood species grown in large plantations in Southeast Asia and South China.Nitrogen requirements for producing robus seedlings,growth and nutrient dynamics were investigated using exponential fertilization treatments.Root collar diameter,height,dry mass and nutrient contents of seedlings increased exponentially in all fertilization treatments as time progressed.Moreover,with water soluble fertilizer(Plant Products plus microelements N–P_2O_5–K_2O:20–20–20),300 mg N seedling^(-1)was adequate.Vector analysis revealed that P was the most responsive nutrient element followed by N and K.Dilutions of N and K were evident in the plants without N addition,which induced initial P sufficiency and then luxury consumption probably due to the antagonistic interaction between N and P.However deficiencies of N,P and K were mostly observed in al exponential regimes during the experiment because seedling growth rate exceeded nutrient uptake rate,inferring that further study on improving the nutrient uptake efficiency is needed.Analysis of relationships among nutrient supply,dry mass,N content and N concentration demonstrated that 100–400 mg N seedling^(-1)induced sufficiency to luxury consumption of nitrogen without significant change in dry mass,and 400 mg N seedling^(-1)is recommended to apply for nutrient loading of seedlings before outplanting.The findings will help improve seedling quality and enhance the production of robust seedlings for plantation forestry of this species.
Betula alnoides is a fast-growing hardwood species grown in large plantations in Southeast Asia and South China.Nitrogen requirements for producing robus seedlings,growth and nutrient dynamics were investigated using exponential fertilization treatments.Root collar diameter,height,dry mass and nutrient contents of seedlings increased exponentially in all fertilization treatments as time progressed.Moreover,with water soluble fertilizer（Plant Products plus microelements N–P2O5–K2O：20–20–20）,300 mg N seedling-1was adequate.Vector analysis revealed that P was the most responsive nutrient element followed by N and K.Dilutions of N and K were evident in the plants without N addition,which induced initial P sufficiency and then luxury consumption probably due to the antagonistic interaction between N and P.However deficiencies of N,P and K were mostly observed in al exponential regimes during the experiment because seedling growth rate exceeded nutrient uptake rate,inferring that further study on improving the nutrient uptake efficiency is needed.Analysis of relationships among nutrient supply,dry mass,N content and N concentration demonstrated that 100–400 mg N seedling-1induced sufficiency to luxury consumption of nitrogen without significant change in dry mass,and 400 mg N seedling-1is recommended to apply for nutrient loading of seedlings before outplanting.The findings will help improve seedling quality and enhance the production of robust seedlings for plantation forestry of this species.