Controlling deterioration of high-moisture maize with ozone treatment
Steven D. White, Patrick T. Murphy, Carl J. Bern and J. (Hans) van Leeuwen
Journal of Stored Products Research, Volume 46, Issue 1, January 2010, Pages 7-12
2010
บทคัดย่อ
Two experiments were conducted to determine the effect of ozone treatment on controlling deterioration of high-moisture maize under extreme and moderate environmental conditions experienced during harvest. In the first experiment, 0.77-kg maize samples held at 22% moisture content were treated with ozone at 0.08, 0.16, 0.31, 0.62, 0.94, 1.25 and 1.56 mg kg maize−1min−1(60–1120 ppm ozone in air during application) for periods of 5 or 24 h, with an additional treatment of 1.56 mg min−1repeated every 3 d, and stored at 32 °C for 9 d under continuous aeration. Ozone treatment decreased dry matter loss compared to the control, but not to a level that would likely justify ozone treatment at the rates and treatment times used. In the second experiment, 2.43-kg maize samples held at 26% moisture content were treated with ozonation rates of 0.25, 0.5, 1, and 2 mg kg maize−1min−1(1090–8680 ppm ozone during application) for 24 h, stored at 15.5 °C for 30 d and passively aerated every 3 d. Additional ozone treatments at the 2 mg kg maize−1min−1rate were applied for 1 h on 3-, 6-, and 12-d intervals throughout the experiment. Single ozone treatments of 1 and 2 mg kg maize−1min−1were equally effective, reducing dry matter loss by 1.3 percentage points compared to the control after 30 d of storage. Repeat treatments at 2 mg kg maize−1min−1did not reduce dry matter loss compared to the single treatment.