บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of crop load on mineral status, maturity and quality of 'Braeburn' (Malus domestica Borkh.) apple fruit.

Tough, H. J.; Park, D. G.; Crutchley, K. J.; Bartholomew, F. B.; Craig, G.;

Acta Horticulturae Year: 1998 Issue: No. 464 Pages: 53-58

1998

บทคัดย่อ

Effect of crop load on mineral status, maturity and quality of 'Braeburn' (Malus domestica Borkh.) apple fruit.

Fruits from light cropping trees were compared to fruits from trees with a crop load typical of other trees within the same block. One block in each of the Nelson and Hastings districts (New Zealand) were evaluated for 3 consecutive years (1992-1994). At harvest, fruits from light cropping trees were larger, lower in calcium, higher in potassium, variable in magnesium, and higher in flesh firmness, soluble solids, background colour and starch pattern index. After 3 months' storage at 0.5 deg C and 7 days at 18 deg C, the differences in flesh firmness, soluble solids, and background colour were maintained with similar rates of movement except for soluble solids in light crop fruits. Fruits from light cropping trees developed higher levels of disorders (bitter pit, lenticel blotch, core flush and Braeburn browning disorder), reducing the proportion of sound fruits by up to 35% compared to fruits from trees with standard crop loads. Sensory evaluation rated fruits from light cropping Braeburn apple

 trees unacceptable because of textural changes, dryness, and atypical flavour. The differences identified were consistent between orchards. Fruits from light cropping trees decreased in quality and had increased disorder levels, especially senescent breakdown, as harvest date advanced, and or storage time increased from 3 to 5 months.