 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Calcium Spray on the Quality of 'Nyoho' Strawberries Grown by Peat-Bag-Substrate Bench Culture) ผู้เขียน: W. Naphun, K. Kawada, T.Matsui, Y. Yoshida, M. Kusunoki สื่อสิ่งพิมพ์:pdf AbstractThe 200 ppm Ca2+ chelated with carboxylic acids (CALHARD?) was preharvesting sprayed to 'Nyoho" strawberries grown by peat-bag-substrate bench culture once a week between April and June, 1997 at the rate of 200 liter. 100m-2. Remarkable increase fruit firmness was the main benefit of the Ca application. Although fruit firmness of all treatments decreased by the end of May, but Ca-applied strawberries were still firmer than control ones. Skin puncture force of Ca-applied berries was higher but the bundle zone puncture force, was not affected. Ca treatment increased ascorbic acid and Ca contents, and maintained fruit soundness by delaying decay caused by gray mold. Both Ca-applied and control strawberries grown on the south side of the bench tended to be higher in firmness and ascorbic acid content. Ca-applied strawberries on the south-side of bench had the highest Ca content and firmness. Ca treatment significantly decreased water soluble pectin (WSP) and increased hydrochloric acid soluble pectin (HSP). After storage at 20?C for 2 days, WSP increased whereas HSP decreased greatly especially in control berries from the north side. Monthly changes in titratable acidity and total soluble solids were not affected by the Ca treatment. |