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|Title: ||Determination of extinction canopy coefficient in oil palm plantation|
|Authors: ||Awal M. A.|
Wan Ishak W. I.
Mohd. Haniff Harun
|Issue Date: ||2004|
|Publisher: ||Malaysian Society of Plant Physiology|
|Citation: ||Advances in plant science: Proceedings of the 15th Malaysian Society of Plant Physiology conference: Port Dickson, Negeri Sembilan (Malaysia), 14-16 Sep, 2004, p. 141-146|
|Series: ||Transactions of the Malaysian Society of Plant Physiology|
|Abstract: ||Extinction coefficient is an important attribute for determining indirect LAI using Beer-Lambert Law, which is difficult to measure in oil palm. In this study, Beer-Lambert Law was applied to determine the mean and range of the extinction coefficient, (k). An independent experimental data set of canopy transmittance and LAI were collected from seven different palm age groups, which was used to estimate 'k' values. LAI values were determined by destructive (direct) method, while the circular method was used to determine the radiation interception by the canopy. Results showed that the lowest 'k' value (0.278) was obtained for the 16 year old palms, and the highest 'k' was (0.762) value obtained for 2-year old palm. The 'k' value of 3, 7, 9, and 12-year old palm groups were 0.755, 0.389, 0.373, and 0.282, respectively. There are several potential factors, which significantly affect 'k' values. In this study, spatial variation, height of the quantum sensor, and canopy depth were evaluated as potential factors affecting 'k'.|
|Appears in Collections:||Publications|
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