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Non-destructive estimation of potato leaf area index using a fish-eye radiometer |
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| Authors: | R Gordon D M Brown M A Dixon |
| Institution: | (1) Plant Industry Branch, Nova Scotia Department of Agriculture and Marketing, B2N 5E3 Truro, Nova Scotia;(2) Dept. of Land Resource Science, University of Guelph, N1G 2W1 Guelph, Ontario;(3) Dept. of Horticulture, University of Guelph, N1G 2W1 Guelph, Ontario |
| Abstract: | Summary Leaf area index (LAI) is widely used in many facets of potato (Solanum tuberosum L.) modelling but direct measurements have historically been difficult. This investigation tested the accuracy of a commercially available instrument (LI-COR LAI-2000) for measuring LAI non-destructively on a potato crop. Accurate estimates of LAI were difficult to obtain with small plots of≈1 m2. Results from larger field plots were extremely favourable and indicate that non-destructive measurements of LAI in situ can routinely be estimated within 5 to 10% of the destructively measured LAI. Six thinning tests performed on four potato cultivars produced average root mean square error measurements of LAI that ranged from 0.09 to 0.27. |
| Keywords: | measurement LAI Solanum tuberosum L |
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