ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Determination of harvest date of apple cultivars in Saxony.

Wilcke, C.;

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: 67-75 Ref: 7 ref.

1996

บทคัดย่อ

Determination of the earliest possible picking date for the large orchards in the eastern part of Germany is of high practical significance, although the introduction of ULO (ultra-low oxygen) storage allows harvesting at a riper stage without storage problems. As well as accumulated temperature and starch degradation, the log Streif-index was confirmed as a useful device for predicting harvest date. Internal fruit quality of winter cultivars on the heavy soils of the hilly region south of Dresden, Saxony, at 200-300 m a.s.l., was higher in warmer years, whereas autumn cultivars such as Elstar had problems with premature senescence under these conditions. The high June temperatures in 1993 caused a shortening of the early harvest period and low fruit acidity and firmness. As in 1986, water core appeared in cultivars Gloster, Gala and Pilot in 1993. A formula using specific weight with a correction for fruit weight enabled good prediction of water core.