NUTRIENT RETRANSLOCATION WITHIN THE FOLIAGE OF PINUS-SYLVESTRIS

被引：114

作者：

HELMISAARI, HS

机构：

[1] Finnish Forest Research Institute, Department of Soil Science, P.O. Box 18, Vantaa

来源：

TREE PHYSIOLOGY | 1992年 / 10卷 / 01期

基金：

芬兰科学院;

关键词：

D O I：

10.1093/treephys/10.1.45

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

During the period 1983-1987, retranslocation of N, P, K, Ca, Mg, Mn, Zn, Fc, B and Al within the foliage of Scots pine (Pinus sylvestris L.) was studied in sapling, pole-stage and mature stands in eastern Finland. Needle concentrations of the mobile nutrients N, P, and K varied seasonally because of retranslocation. In unfertilized plots, needle contents of N, P and K decreased 62-92% during senescence and needle dry weight decreased 19-51%. In some years, needle contents of Ca, Mn, Zn, Fe, B and Al increased during senescence. Retranslocation was more efficient from needles with greater dry weight. In the fertilized, pole-stage stand, needle dry weight did not decrease at senescence four years after fertilization and nutrient content decreased less than in the other years. In the mature stand, there were no clear differences in needle dry weight and nutrient changes during senescence between years or between unfertilized and fertilized plots.

引用

页码：45 / 58

页数：14

共 29 条

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