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Crop productivity in relation to interception of photosynthetically active radiation

OAR@ICRISAT

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Relation http://oar.icrisat.org/7474/
http://dx.doi.org/10.1016/0168-1923(84)90015-7
 
Title Crop productivity in relation to interception of photosynthetically active radiation
 
Creator Sivakumar, M V K
Virmani, S M
 
Subject Agriculture-Farming, Production, Technology, Economics
 
Description The attenuation of photosynthetic photon flux density (PPFD) in maize, sorghum, pigeonpea, and a maize/pigeonpea intercrop in the operational research watersheds at ICRISAT, India was measured weekly throughout the growing season. A 2-m high frame covering an area 3 m² was designed to accomodate 4 manually-operated traversing quantum sensors for the measurement of PPFD. The interception of PPFD by crop canopies was closely related to LAI. Plots of the regression relationship between DM for different crops and cumulative intercepted PPFD (g DM/einstein intercepted) were used to define the efficiency of light interception by crops. The intercrop was the most efficient, followed by maize, sorghum and pigeonpea. Interception of PPFD could be accurately predicted for sorghum and maize using the Bouguer-Lambert law but it was not satisfactory for pigeonpea
 
Publisher Elsevier
 
Date 1984
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/7474/1/AFM_31_131-141_1984.pdf
Sivakumar, M V K and Virmani, S M (1984) Crop productivity in relation to interception of photosynthetically active radiation. Agricultural and Forest Meteorology, 31 (2). pp. 131-141. ISSN 0168-1923