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林业科学 ›› 2009, Vol. 12 ›› Issue (1): 152-157.doi: 10.11707/j.1001-7488.20090126

• 论文 • 上一篇    下一篇

3 种桉树幼苗叶片养分变化及其转移特性

理永霞1,2 茶正早1 罗微1 林钊沐1 贝美容2   

  1. (1.中国热带农业科学院橡胶研究所 农业部热带作物栽培生理学重点开放实验室 儋州 571737;2.南京林业大学 南京 210037)
  • 收稿日期:2007-11-15 修回日期:1900-01-01 出版日期:2009-01-25 发布日期:2009-01-25

Dynamics and Transfer of Nutrients in the Seedling Leaves of Three Eucalyptus Varieties

Li Yongxia1,2,Cha Zhengzao1,Luo Wei1,Lin Zhaomu1,Bei Meirong2   

  1. (1. Rubber Research Institute, CATAS Ministery of Agriculture Key Laboratory for Tropical Crop Physiology Danzhou 571737; 2. Nanjing Forestry University Nanjing 210037)
  • Received:2007-11-15 Revised:1900-01-01 Online:2009-01-25 Published:2009-01-25

关键词: 关键词:桉树幼苗, 养分含量, 养分转移率

Abstract:

Abstract: Nutrient dynamic and transfer characteristics of trees reflect the preservation and utilization of nutrients, and the adaptability to the infertile soil and environment. The change of nutrient content and the transfer ratio of element N, P, K, Ca, Mg in living and fallen leaves of three Eucalyptus varieties of 184.1, 201.2, guanglin-9 were measured and analyzed. The results indicated that the content of N ,P, K ,Ca ,Mg in leaves was significantly different monthly within a year. In general, the nutrient content and the transfer rate of the leaf were relatively higher in the growing season (6-10 months) than that in other seasons. The nutrient content in the living leaves was significantly higher than that of the fallen ones, and the nutrient content in the living leaves was positively correlated (r=0.94, P<0.01) with that in the fallen ones. The nutrient content and the transfer ratio were different among the three varieties of eucalyptus. Contents of N and Ca were the highest in 184.1, and contents of P, K, Mg were the highest in 201.2, while contents of the other four elements except N were the lowest in Guanglin-9. In terms of the nutrient transfer rate, Ca had no change, and the rate of the other four elements was P>N>K>Mg and the difference was significantly different (F=192.19, P<0.01). The nutrient content of the leaf was significantly (t=2.97>t 0.025 (6) =2.446 9), however the nutrient transfer rate was not remarkably affected by fertilization. There was no significant difference in the nutrient transfer rate among the three Eucalyptus varieties. The results showed that the changes of leaf nutrient content and the transfer rate were related with many factors, such as growth characteristics and biological characteristics of species and external conditions.

Key words: Key words: Eucalyptus seedlings, nutrient content, nutrient transfer rate