| 杉木人工林的养分归还动态 |
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| 引用本文： | 樊后保,胡石峰. 杉木人工林的养分归还动态[J]. 福建林学院学报, 1996, 0(3) |
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| 作者姓名： | 樊后保 胡石峰 |
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| 作者单位： | 福建林学院资源与环境系，福建省霞浦县林业局 |
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| 基金项目： | 日本国际绿化推进中心（JIFPRO）资助 |
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| 摘 要： | ４２年生杉木人工林的年凋落量为３０８３．９ｋｇ／ｈｍ２，在一年中的５月和１１月出现两次高峰．凋落物中主要营养元素的年归还量为７２．１３８ｋｇ／ｈｍ２，其归还量大小顺序为Ｃａ＞Ｎ＞Ｍｇ＞Ｋ＞Ｐ．降水在杉木人工林中引起的养分淋溶也是养分归还的一个重要方面，五种营养元素的年总淋溶量为７１．２８９ｋｇ／ｈｍ２，在２月和５月亦出现两次高峰，淋溶量大小顺序为Ｋ＞Ｃａ＞Ｍｇ，而Ｎ和Ｐ出现负值，表明两者被林冠层直接吸收．
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| 关 键 词： | 杉木人工林；养分归还；森林凋落物；养分淋溶 |
Dynamics of Nutrient Return in Chinese Fir Plantation |
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| Fan Houbao. Dynamics of Nutrient Return in Chinese Fir Plantation[J]. Journal of Fujian College of Forestry, 1996, 0(3) |
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| Authors: | Fan Houbao |
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| Abstract: | The annual litterfall in a 42-year-old Chinese fir plantation was 3083.9kg/hm2. The monthly patments in litterfall decreased in the order: calcium>nitrogen>magnesium>potassium>phosphorus, with a total content of 72. 138kg/ (hm2· a). The leaching of nutrients from standing trees was also an improtant · a) to the forest floor, exhibiting two peaks( in February and May) in monthly nutrient return. The relative extent to which precipitation leached nutrients decreased in the order:potassium>calcium>magnesium.However, the leached content of nitrogen and phosphorus were negative, which suggested that both of the nutrient elements were absorbed directly by tree crowns during precipitation. |
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| Keywords: | Chinese fir plantation nutrient return forest litterfall nutrient leaching |
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