บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Evaluation of harvest indexes of apples grown in Hungary

Meresz, P., Sass, P. and Lovasz, T.

COST 94. The postharvest treatment of fruit and vegetables. Determination and prediction of optimum harvest date of apples and pears. Proceedings of a meeting, Lofthus, Norway, 9-10 June 1994. Year: 1996 Pages: 53-60.

1996

บทคัดย่อ

Evaluation of harvest indexes of apples grown in Hungary.

In trials conducted from 1991 to 1994, apples of 6 cultivars were harvested from 2 orchards at 3 times in Sep. at 6- to 10-day intervals, depending on the weather. The samples were stored at 2-3 deg C and 92-94% RH. Quality determinations were carried out at harvest and after 5, 6 and 7 months of storage. Starch index, refraction, firmness, titratable acid, sensory evaluation, disorders and diseases were assessed. It was found that the use of maturity indexes proposed by Streif (F/RS (firmness/(refractometer value x starch index))) and de Jager (F x (11 - S)/R) would be good methods, with a modification, for predicting optimum harvest date (OHD). The refraction parameter could be changed to refraction/titratable acid, resulting in a new index termed FARS. The sensitivity of quality determination after storage could be increased using methods based on ranking the samples instead of using absolute values. The Streif index was more accurate for cultivars harvested when starch degradation was still

in progress, while the de Jager index was a better tool for cultivars harvested when starch degradation was almost complete.