引种针叶树种矿质元素浓度及季节变化的比较研究

Abstract

Abstract:

This paper deals with the results of a comparison study on mineral element (N、P、K、Ca and Mg) concentrations and their seasonal dynamics in needles collected from 15 introduced conifers. During a year at spring(30, April), summer (30, July), autumn (30, October) and winter (30, January), the current-year and one-year-old needles were collected from ten trees of each species. The needles from all ten trees were bulked into two composite samples according their foliar age for chemical determination. The results show that, there are significant differences in foliar nutrient concentration among 15 woody species planted at same site. The element concentration for all 15 species was following:N>K>Ca>P>Mg. The P, K, and Ca seasonal dynamic patterns in foliar concentration showed extremely similar for all species but the N and Mg exhibited higher differentiation among species. The results also indicated that the element concentrations and seasonal dynamics of each element had remarkable differences between two subgenus in Pinus.

Key words: Conifer, Mineral element, Seasonal dynamics

Mujiu Lin,ping Xue,Yunyue Zhang,Xudong Xie,Yimin Wang. A COMPARISON STUDY ON NUTRIENT CONCENTRATIONS AND SEASONAL DYNAMICS IN NEEDLES OF 15 INTRODUCED CONIFERS[J]. Scientia Silvae Sinicae, 1998, 34(5): 21-28.

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A COMPARISON STUDY ON NUTRIENT CONCENTRATIONS AND SEASONAL DYNAMICS IN NEEDLES OF 15 INTRODUCED CONIFERS

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