火炬松人工林林木营养特性的研究*

Abstract

Abstract:

The results from a quantitative study on the nutrient characteristics of the forest trees in a 15-year-old Pinus taeda plantation, located in Xiashu Forest Farm, Jiangsu Province by experimental control fixed position observation, and analysis of nutrient elements, show that (1) There is only a significant difference in P element among different layers of tree corwn, and in K element among various individual plants; (2) The seasonal dynamics changes in the contents of N, P, K, and Mg elements have a pattern of increase-decrease, however the cont entof Ca element enhance slightly.The contents of N, P, K in new shoots are relatively high, that of Ca, Mg is low, hereafter the contents of N, P, K have a pattern of incresae-constant-decrease, the content of Mg has a pattern of increase-relatively constant, Ca element is in a sustained increase status; (3) There is a significant seasonal change in the contents of nutrient elements in branch, stem, bark and root; (4) The nutrient element contents in different parts of forest tree are in a rank of leaf > branch > root > stem > bark.

Key words: Pinus taeda planation, Nutrient element, Spacial variation, Seasonal dynamics

Shimin Fei. STUDY ON NUTRIENT CHARACTERlSTlCS OF THE FOREST TREE IN A LOBLOLLY PINE PLANTATION[J]. Scientia Silvae Sinicae, 1995, 31(4): 299-309.

Figures/Tables 11

References 25

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STUDY ON NUTRIENT CHARACTERlSTlCS OF THE FOREST TREE IN A LOBLOLLY PINE PLANTATION

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