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A Model of the Influence of Air Temperature and Solar Radiation on the Time to Maturity of Calabrese Brassica oleracea var italica
Authors:MARSHALL  B; THOMPSON  R
Institution:Scottish Crop Research Institute Invergowrie, Dundee, DD2 5DA, Scotland, UK
Abstract:The concept of thermal time is applied to the prediction ofduration from sowing to maturity of calabrese (Brassica oleraceavar italica cv. Corvet), using a multiple linear regressionmodel. Given daily records of maximum and minimum air temperatureand total solar radiation, maturity could be predicted to within±7 d for nine out of ten crops over the four years considered.Within any one year the precision improved to ±5 d. Calabreseappeared to stop developing at a base temperature of 0 °C.Thermal time accounted for 74·3 per cent of the variationin reciprocal total duration and solar radiation a further 17·7per cent. Model, weather, calabrese, broccoli, thermal time, solar radiation
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