| 油松人工林营养元素含量时间变异的研究 |
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| 引用本文： | 朱建林,郭景唐,等.油松人工林营养元素含量时间变异的研究[J].北京林业大学学报,1989,11(3):100-102. |
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| 作者姓名： | 朱建林 郭景唐 |
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| 作者单位： | 林业资源学院 |
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| 摘 要： | 对油松针叶中N,P,K,Ca,Mg元素含量时间变异的研究表明,这5种元素可分为三种类型:下降-季节性升降型(N,P,K),持续增加型(Ca)和稳定型(Mg)。
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| 关 键 词： | 油松 营养元素 时间变异 |
Study on Variance of Nutrient Content with Time in Pinus tabulaeformis Plantation |
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| Zhu Jianlin Guo Jingtang Ou Guojing.Study on Variance of Nutrient Content with Time in Pinus tabulaeformis Plantation[J].Journal of Beijing Forestry University,1989,11(3):100-102. |
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| Authors: | Zhu Jianlin Guo Jingtang Ou Guojing |
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| Institution: | Forest Resources College |
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| Abstract: | Nutrient content in Pinus tabulaeformis needles varies with season and age. According to the mode of variance, N, P, K, Ca and Mg were divided into three groups. N, P, K (declining usually but rising in some season), Ca(rising steadily with time), and Mg (relatively constant). |
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| Keywords: | Pinus tabulae formis nutrient elements variance with time |
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