บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of orchard factors and mineral nutrition on bitter pit in 'Golden Delicious' apples.

Sio, J.; Boixadera, J.; Rosera, J.;

Acta Horticulturae Year: 1999 Issue: No. 485 Pages: 331-334 Ref: 12 ref.

1999

บทคัดย่อ

Effect of orchard factors and mineral nutrition on bitter pit in 'Golden Delicious' apples.

Relationships between soil fertility, leaf and fruit mineral content, yield, fertilizer application, irrigation, cultural practices and orchard factors (including rootstocks, tree age, soil management, training, chemical sprays and growth regulators) and bitter pit incidence were studied in 20 commercial Golden Delicious apple orchards in 1994, 50 in 1995 and 67 in 1996 in the region of Lleida, Spain. Bitter pit incidence was evaluated on fruits collected from each orchard, stored either for 20 days at room temperature or for 6 or 9 months in controlled atmosphere storage (2% O2 + 3% CO2, 11 deg C). Preliminary results show that bitter pit was usually correlated with Ca content and with K:Ca, (K+Mg):Ca and N:Ca ratios, both in fruits and leaves. Shoot growth and yield were also correlated with incidence of bitter pit. The available preliminary results show that improved management of irrigation, K fertilization and soil fertility could reduce the incidence of bitter pit.