Abstract
An experiment was conducted to determine the effect of concentrations of boron (B) and calcium(Ca) in nutrient solution on growth, vase life of cut flowers and leaf marginal burn in chrysanthemums (C. morifolium Ramat. cv. Seikonohana) grown in sand or soil. Vase life of cut flowers decreased with increasing B concentrations in the treatment solution. Decrease in the vase life by B treatment was suppressed at high Ca concentrations in the solution. With increasing B concentrations, marginal burn in leaves appeared earliar and the degree became severe. With increasing Ca concentrations, appearance of the burn slightly delayed. Boron in leaves increased with increasing B concentrations. However, it decreased as Ca concentrations increased. Boron in marginal areas of leaves having marginal necrosis was 1, 150 to 1, 725ppm, which was significantly higher than that in the healthy leaf areas
