Improve Productivity and Fruit Quality of Florida Prince Peach Trees Using Foliar and Soil Applications of Amino Acids

Abstract

Florida Prince peach trees grown under calcareous soil conditions were treated with amino acids (in form of Pepton as a commercial product) as foliar and/or soil application. The treatments were arranged as follows: (1) control (spraying water only) (2) soil application at 0.25% (3) Foliar spray at 0.25% (4) Soil application at 0.50 % (5) Foliar spray at 0.50 % (6) Soil application at 0.25% + foliar spray 0.25% (T2+T3) (7) Soil application at 0.50% + foliar spray at 0.50% (T4+T5). All treatments were applied after fruit set and repeated four times at 15 days intervals. The results indicated that, foliar and/or soil application of amino acids had a positive effect on productivity and fruit quality, leaf mineral content and chlorophyll contents. Application of amino acids as foliar spray combined with soil application at 0.50% for both is the promising treatment for improving growth and fruit characteristics of 'Florida Prince' peach. 3 the profile more than 8 %. The carbonates, due to thei r adapt to Egypt's local environmental conditions. I t relatively high solubility, reactivity and alkaline character, appears in the markets before the other fruits due to it s buffer the pH of most calcareous soils within the range of low chilling and temperature requirements that achieve 7.5 to 8.5. Therefore, the practices for fruit trees in early flowering and fruit maturation. Therefore, Florida calcareous soils are differ than those in non-calcareou s Prince Peach is considered as promising cultivar in Egypt soils due to the effect of soil pH on soil nutrient (10). availability and chemical reactions that affect the loss or The aim of this study is to investigate the effect of fixation of almost all nutrients (2). The amino acids play an exogenous application of amino acids on productivity important role in reducing pH of the soil when they were and fruit quality of 'Florida Prince' peach trees under conducted directly as the soil application. Therefore, uses calcareous soil conditions. of the amino acids improve nutrient availability especially microelements in calcareous soils by decreasing soil pH. MATERIALS AND METHODS Also, foliar application of the amino acids is ver y necessary for plants under calcareous soil conditions Plant Materials and Treatments: The present study was because they considered as precursors and constituents conducted during the two successive seasons; 2009/2010 of proteins (3) which are important for stimulation of cell and 2010/2011 at Al-Nobaria district near Alexandria, and act as buffers, which help to maintain favorable pH

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