Effects of applications of a complex and N-Ca fertilizer on leaf and fruit nutrient concentrations and some fruit quality parameters in two apple cultivars
Sotiropoulos, T.E.(Pomology Inst., Naoussa (Greece))E-mail:thosotir@alfanet.gr | Therios, I.N.(Aristotle Univ. of Thessaloniki (Greece). Lab. of Pomology) | Dimassi, K.N.(Aristotle Univ. of Thessaloniki (Greece). Lab. of Pomology) | Tsirakoglou, V.(Aristotle Univ. of Thessaloniki (Greece). Lab. of Pomology)
The aim of this research was to study the effects of application of hydrocomplex (H) and Norway nitrate (NN) fertilizers on leaf and fruit nutrient concentrations and some fruit quality parameters in two Malus domestica cultivars, Golden Delicious (GD) and Black Ben Davis (BBD). Applications of 50 kg NN, 75 kg NN, 50 kg NN plus 50 kg H and 75 kg NN plus 25 kg H per 0.1 ha significantly increased Ca concentration in GD leaves. B concentration in BBD leaves increased steadily throughout the season. Applications of 75 kg H and 75 kg H plus 25 kg NN per 0.1 ha significantly increased B concentration in BBD apples. Applications of 25-75 kg NN, 25-75 kg H as well as the combination of the two fertilizers decreased the ratios N/Ca, K/Ca and K + Mg/Ca in apples of both cultivars. Applications of 50 kg (NN), 75 kg (H), 25 kg (NN) plus 75 kg (H) and 75 kg (NN) plus 25 kg (H) significantly increased soluble solids in GD apples.
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