3种桉树幼苗叶片养分变化及其转移特性  

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

作　　者：理永霞[1,2] 茶正早[1] 罗微[1] 林钊沐[1] 贝美容[2] 

机构地区：[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

出　　处：《林业科学》2009年第1期152-157,共6页Scientia Silvae Sinicae

基　　金：农业科技成果转化项目(04EFN214600244)桉树营养诊断指导施肥技术的转化与推广

摘　　要：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.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.

关 键 词：桉树幼苗 养分含量 养分转移率 

分 类 号：S718.43[农业科学—林学]