若干北方落叶树木叶片养分的内外迁移Ⅰ.浓度和含量的变化

应用生态学报 ›› 1997, Vol. 8 ›› Issue (1): 1-6.

• 研究论文 • 下一篇

若干北方落叶树木叶片养分的内外迁移Ⅰ.浓度和含量的变化

徐福余, 王力华, 李培芝, 许思明, 张颂云

中国科学院沈阳应用生态研究所, 沈阳 110015

收稿日期:1996-04-05 修回日期:1996-08-18 出版日期:1997-01-25 发布日期:1997-01-25
基金资助:
中国科学院陆地生态系统痕量物质生态过程开放实验室基金

Internal and external nutrient transfers in foliage of some north deciduous trees Ⅰ Changes of nutrient concentrations and contents

Xu Fuyu, Wang Lihua, Li Peizi, Xu Siming, Zhang Songyun

Institute of Applied Ecology, Academia Sinica, Shenyang 110015

Received:1996-04-05 Revised:1996-08-18 Online:1997-01-25 Published:1997-01-25

摘要/Abstract

摘要： 研究了北方12个落叶树种单位面积叶干重、叶片灰分、有机物质和7个元素的浓度和含量在落叶前后的变化,同一元素不同树种间及同一树种不同元素间有着不同的变化模式.单位面积叶干重、叶片有机物质浓度和含量在落叶后均表现下降的趋势;所有树种叶片灰分浓度和大部分树种的灰分含量(除刺槐、胡颓子、核桃楸外)均有增加;落叶时N、P、K的单位叶面积含量均可减少约1/3～2/3;Mg含量的减少在胡颓子、核桃楸、春榆、蒙古栎、日本落叶松等5个树种中发生,其余树种表现增加;落叶中Fe含量除胡颓子下降外,其余均表现升高;落叶中Ca、Si浓度和含量在所有分析树种中均表现增加趋势.

关键词: 落叶树种, 养分浓度, 养分含量, 景天酸代谢植物(CAM植物), 光合作用, CO₂浓度, 八宝景天, 糖代谢

Abstract: Twelve north deciduous tree species are studied to characterize their changes of dry leaf weight, and concentrations and contents of ash, organic matter and 7 elements in leaves per area before and after leaf fallen.Different change patterns are detected among tree species and among elements.The decrease of dry weight and organic matter in fallen leaves is measured in all analyzed tree species, while the increase is found in ash concentrations of all speies and in its contents of most species (except Robinia pseudoacacia,Elaeagnus angustifolia and Juglans madshurica). The contents of N, Pand Kare decreased by about 1/3 to 2/3 during leaf fallen.Mg contents are decreased in species Elaeagnus angustifolia, Juglans mandshurica, Ulmus propingua, Quercus mongolica and Larix kaempferi, but increased in others. Fe content is higher in fallen leaves than in living leaves for all trees except Elaeagnus angustifolia. Ca and Si concentrations and their contents are markedly increased in all species.

Key words: Deciduous trees, Nutrient concentration, Nutrient content, Hylotelephium erythrostictum, carbohydrate metabolites, crassulacean acid metabolism plant (CAM plant), CO₂ concentration, photosynthesis

徐福余, 王力华, 李培芝, 许思明, 张颂云. 若干北方落叶树木叶片养分的内外迁移Ⅰ.浓度和含量的变化[J]. 应用生态学报, 1997, 8(1): 1-6.

Xu Fuyu, Wang Lihua, Li Peizi, Xu Siming, Zhang Songyun . Internal and external nutrient transfers in foliage of some north deciduous trees Ⅰ Changes of nutrient concentrations and contents[J]. Chinese Journal of Applied Ecology, 1997, 8(1): 1-6.

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若干北方落叶树木叶片养分的内外迁移Ⅰ.浓度和含量的变化

Internal and external nutrient transfers in foliage of some north deciduous trees Ⅰ Changes of nutrient concentrations and contents

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