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Journal of Forestry Research

, Volume 12, Issue 3, pp 153–156 | Cite as

Effects of different N sources on growth, nutrient uptake and ionic balance ofLarlix gmelini seedlings

  • Chen Yong-liang
  • Han Shi-jie
  • Su Bao-ling
Article

Abstract

The effect of different sources and levels of N on dry matter production, nutrient uptake and ionic balance ofLarlix gmelini was studied. The results showed that the growth of the plants fertilized with ammonium was not as good as the control treatment. The growth of the plants fertilized with ammonium nitrate did not differ significantly from that in control or nitrate treatment, but was better than that in the ammonium treatment. Total cation concentrations in shoots varied little with N level in the ammonium and ammonium nitrate treatments, while those in the shoot increased with N level in the nitrate treatment. The treatments had little effect on the anion concentrations in the shoot. In the roots, the concentrations of both cations and anions changed little except for SO4 2− and Ca2+. There existed a higher carboxylate production in the plants fertilized with nitrate. The ratio between the production of carboxylate and the production of organic N Δ(C-A)/ΔNorg was constant with N supply in the plants receiving nitrate, but obviously declined with N supply for ammonium-fed plants. Δ (C-A)/ΔNorg values were intermediate between those of the nitrate and the ammonium-fed plants as for the mixed N source.

Key words

N resource Growth Nutrient uptake Ionic balance 

CLC number

S714.8 

Document code

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Copyright information

© Editorial Board of Journal of Forestry Research 0131 0109 V 2 2001

Authors and Affiliations

  • Chen Yong-liang
    • 1
  • Han Shi-jie
    • 2
  • Su Bao-ling
    • 3
  1. 1.Northeast Forestry UniversityHarbinP.R. China
  2. 2.Institute of Applied EcologyChinese Academy of SciencesShenyangP.R. China
  3. 3.Shenyang UniversityShenyangP.R. China

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