| 营养元素在油松非同化器官中分布的研究 |
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| 引用本文： | 高甲荣.营养元素在油松非同化器官中分布的研究[J].西北林学院学报,1988,3(2):1-7. |
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| 作者姓名： | 高甲荣 |
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| 作者单位： | 西北林学院森保系 |
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| 摘 要： | 研究结果表明,木质部氮、磷、钾和镁含量从心材到边材递增,而钙含量降低。外树皮的营养元素含量均低于内树皮的测定值。干、皮中元素含量随树干高度变化不大,仅在梢头氮、磷、钾含量有显著增高,枝中元素含量随枝龄的增加而降低,不同轮枝层的二龄枝中这些元素含量变化不 大。根中氮、磷、钾、钙、镁含量随根径的增大而减少。
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| 关 键 词： | 油松 元素分布 非同化器官 |
STUDIES ON THE DISTRIBUTION OF NUTRIENT COETENT IN NONASSIMILATION ORGANS OF PINUS TABULAEFORMIS CARR. |
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| Gao Jiarong.STUDIES ON THE DISTRIBUTION OF NUTRIENT COETENT IN NONASSIMILATION ORGANS OF PINUS TABULAEFORMIS CARR.[J].Journal of Northwest Forestry University,1988,3(2):1-7. |
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| Authors: | Gao Jiarong |
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| Institution: | Dept. of Forest Resources Conservation |
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| Abstract: | The nutrient content of stem, branch, bark and root of Pinus tabulaeformis Carr. Were analysed. The reults of the study show that the content of nitrogen phosphorus, potassium and magnesium in xylem increased from heart-wood to sap-Wood while that of calcium decreased. The nutrient content of inner bark were lower than that of outer bark. There Were not significant variations of nutrient content in different height of stem, but the content of N, P and K in top of the tree increased obvionsly. The nutrient content of branch decreased as the branch age increased. The variation is not significant in nutrient content of 2-year-old branches in different sampling height. The content of N, P, K, Ca and Mg in root decreased as root diameter increased. |
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| Keywords: | Pinus tabulaeformis Carr element distribution nonassimilation organ |
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