The effect of soil fertilization with DAP and foliar spray of boron on the nutritional status and some fruit quality characteristics of apple trees cv. "Anna".

Abstract

An experiment was carried out in a private orchard (30 km) north east Kerbala' city on 9 – year – old apple trees cv. "Anna". This experiment included two levels of diammonium phosphate (DAP) (0 and 1 kg/tree) interacted with three concs . of boron (0,10 and 20 ) mg /l as foliar application . The aim of this experiment was to assess the influence of these factors and their interactions on macronutrients concs . in leaves and fruits as well as on some fruit quality characteristics. A completely randomized design was adopted, included 6 treatments (2x3) for DAP and B concs. respectively with three replicates .Treatment means were compared using L.S.D.at 5% probability level . The following results were obtained :1- Soil fertilization with DAP significantly increased leaves and fruits N,P,K,Ca and B , whereas, Mg conc. was decreased .2- Foliar application of boron markedly increased leaves P,K,Ca and B and fruits N,P,K,Ca and B as well as all characteristics of fruit quality , while, Mg was decreased . 3- The interaction between these two factors significantly increased leaves P,Ca ,Mg and B as well as fruits N,P,Mg,B and (T.S.S.).