บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Improvement of fruit quality and storage potential of 'Braeburn' apple through deficit irrigation.

Mpelasoka, B. S.; Behboudian, M. H.; Dixon, J.; Neal, S. M.; Caspari, H. W.;

Journal of Horticultural Science and Biotechnology Year: 2000 Vol: 75 Issue: 5 Pages: 615-621 Ref: 30 ref.

2000

บทคัดย่อ

Improvement of fruit quality and storage potential of 'Braeburn' apple through deficit irrigation.

In a field experiment in Marlborough, New Zealand, 10-year-old apple trees (cv. Braeburn on MM.106 rootstock) were subjected to commercial irrigation (control, C), early deficit irrigation (EDI) applied from 63 to 118 days after full bloom (DAFB) and late deficit irrigation (LDI) applied from 118 to 201 DAFB (final harvest), in 1997-98. Fruits picked at final harvest were assessed for their internal ethylene concentration, starch pattern index (SPI), flesh firmness, total soluble solids (TSS), titratable acidity, aroma volatiles, soluble sugars, density, dry matter concentration (DMC) and minerals (Ca2+, Mg2+ and K+). Gross yield per tree was 77.9, 67.0 and 58.3 kg for C, EDI and LDI treatments, respectively, and corresponding mean fruit weights were 199.0, 167.3 and 167.9 g, respectively. Both EDI and LDI treated fruits were firmer and had higher density at harvest (0.86 and 0.87 g/cm3, respectively) than C treated fruits (0.81 g/cm3). Increased DMC was observed in both DI treatments. TSS and t

otal sugar concentration increased after storage for 12 weeks at 0 deg C and were higher in EDI and LDI than in C fruits, before and after storage. Titratable acidity was highest at harvest in EDI fruits and decreased after storage to the same level in all treatments. Irrigation treatments had no effect on total aromatic volatiles and mineral concentrations. At harvest, SPI and ethylene concentration in C and EDI fruits were similar and were lower than in LDI fruits, suggesting that C and EDI fruits had similar maturity which was less than LDI fruits. After storage, all fruits had the same SPI but DI treated fruits had higher internal ethylene concentrations than C fruits. Although EDI and LDI fruits differed in maturity at harvest, their quality was generally similar and better than C fruits.