Basic Production Analysis of Forages using a Factor of Light Interception Property o Canopy
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- 下條 雅敬
- Laboratory of Animal Feed Science,Division of Animal Science,Department of Animal and Marine Bioresource Sciences,Faculty of Agriculture,Kyushu University
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- 浅野 陽樹
- Research Fellow,Faculty of Agriculture,Kyushu University
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- 池田 堅太郎
- Research Fellow,Faculty of Agriculture,Kyushu University
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- 石若 礼子
- Research Fellow,Faculty of Agriculture,Kyushu University
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- 佐藤 洋行
- Laboratory of Animal Feed Science,Division of Animal Science,Department of Animal and Marine Bioresource Sciences, Graduate School of Bioresource and Bioenvironmental Sciences,Kyushu University
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- 中野 豊
- Kyushu University Farm
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- 大場 憲子
- Research Student, School of Agriculture, Kyushu University
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This numerical study of crop growth rate (CGR) was conducted to investigate the forage productivity per unit of leaf area using mean leaf area weighted with relative light intensity (MLA) in a forage canopy. The results obtained were as follows. (1)The MLA was a kind of combination of light extinction coefficient (K) and leaf area index (LAI) of a canopy. The MLA with large K showed a lower value than that with small K for all LAI and the difference increased with the increase in LAI, suggesting that MLA was small when the shading effect was high due probably to large area of leaves inclining horizontally. (2)The application of MLA to CGR led to modificated net assimilation rate (mNAR) and modificated LAI(mLAI), where CGR=(mNAR)・(mLAI). Higher values in mNAR than in NAR suggested than the combination of K and LAI was more important than LAI only in assessing the contribution of canopy leaves to forage productivity, especially when the canopy was large in shading effect and low in the efficiency of light interseception.
収録刊行物
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- Journal of the Faculty of Agriculture, Kyushu University
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Journal of the Faculty of Agriculture, Kyushu University 49 (1), 33-38, 2004-02-01
九州大学大学院農学研究院
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詳細情報 詳細情報について
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- CRID
- 1390009224683836672
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- NII論文ID
- 110001802418
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- NII書誌ID
- AA00247166
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- DOI
- 10.5109/4562
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- HANDLE
- 2324/4562
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- ISSN
- 00236152
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
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