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- Author or Editor: F. M. R. Isenberg x
Abstract
Cabbage (Brassica oleracea var. capitata L.) was stored for 6 months at 1°C in 100, 85 and 75% relative humidities under 2 atmospheric regimes: normal air and 5% CO2 –2.5% O2 with the balance N2 (controlled atmosphere, CA). Disease, direct weight and color losses were less at 100% relative humidity than at either 85% or 75% relative humidity. CA treatments showed less disease and had better green color than corresponding air treatments for all humidities. Based on high humidity air storage as the control treatment, the ‘Harris Resistant Danish #277 (HRD) showed a greater response to high humidity CA storage in terms of color retention than ‘Green Winter’ (GW). However, GW was the better adapted of the 2 cultivars to all storage treatments tested in that it deteriorated less rapidly.
Abstract
Four cultivars and several breeding lines of storage cabbage were grown by direct seeding and by transplanting over 2 seasons. Weights and densities of heads harvested at successive intervals in conjunction with heat units and available solar radiation yielded estimates of the time to maturity and the mature time interval in the field before splitting is likely to occur. Most cultivars of storage cabbage are ready for harvest when they have attained a density of 0.72–0.80 and a weight of 2.2–3.0 kg which corresponds to accumulation of 1000 to 1050 C heat units (10°C base) and 50,000 to 5000 gm/cal/cm2 solar radiation units. The interval between maturity and splitting varied from less than 1 week to more than 6 weeks depending upon cultivar and weather conditions.