Spatial and Temporal Variation in Photon Flux Density on Rice(Oryza sativa L.)Leaf Surface
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概要
- 論文の詳細を見る
Spatial and temporal variations of photosynthetic photon flux density (PFD) measured using small photodiodes (Hamamatsu, model G1118) attached on the leaf surface of rice (Oryza sativa L.) differed with the orientation and inclination even at the same height of the canopy. Under sunny conditions, the fluctuation pattern of PFD was mainly determined by the orientation and inclination of the leaf surface, and not by the daily change of PFD in the open, e. g., high peaks of PFD were observed in the morning on east-oriented leaves, but only low peaks on north-oriented leaves. Under overcast conditions, however, the PFD on the leaf surface depended highly on the PFD in the open irrespective of the leaf orientation and inclination. The present study suggests that the orientation and inclination should be considered as the major factors influencing the PFD regime (spatial variation and daily total PFD) within the rice canopy. To determine the effects of spatial and temporal variations of PFD on crop productivity, the daily net assimilation of each leaf was estimated from the obtained data and the light-photosynthesis curve.
- 日本作物学会の論文
著者
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TANG Yanhong
Environmental Biology Division, National Institute for Environmental Studies
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Tang Yanhong
National Inst. For Environmental Studies Ibaraki Jpn
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Tang Yanhong
Environmental Biology Division National Institute For Environmental Studies
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Tang Yanhong
Institute Of Biological Sciences University Of Tsukuba
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Tang Yanhong
Division Of Environmental Biology National Institute For Environmental Studies
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Kanda Hiroshi
Institute For Basin Ecosystem Studies Gifu University
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Koizumi Hiroshi
Institute For Basin Ecosystem Studies Gifu University
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Koizumi H
Gifu Univ. Gifu Jpn
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Koizumi Hiroshi
Department Of Biology Faculty Of Education And Integrated Arts And Sciences Waseda University
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NISHIMURA Seiichi
National Institute of Agro-Environmental Sciences
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Koizumi Hiroshi
National Institute of Agro-Environmental Sciences
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Tang Y
Environmental Biology Division National Institute For Environmental Studies
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Tang Yanhong
National Inst. Environmental Studies Ibaraki Jpn
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Nishimura Seiichi
National Institute For Aero-environmental Sciences
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