Coffee Board of Kenya Monthly Bulletins September 1976

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Date
1976
Authors
Kumar D.
Tieszen L. L.
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Abstract
Apparent photosynthetic rates in coffee were measured using a Differential Infra Red as Analyser.Photosynthetic rates were found to be optimum between 20-25C Low light intensity of 600 ue m -2 S-1 gave very nearly the optimum photosynthesis.High radiation,if the accompanying temperature rise remained unchecked,lowered the rate. Relatively high humidity increased the photosynthetic rate. All the three major elements viz., N, P & K increased the rate of photosynthesis of plants which had a good supply of these elements.Photosynthesis was not affected very much at the leaf water potential of 20 bars, but at -27 bars and below the rates were drastically reduced.The fourth and the fifth pairs of leaves recorded the maximum rate of photosynthesis.Practical implications of these studies have been mentioned.
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Monthly Bulletin, 41 (486)
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