Abstract

Abstract We determined the influence of fertilizer and cultural treatments upon peach flesh resistance to browning, soluble solids, titratable acidity, pH, and soluble ninhydrin-positive nitrogenous compounds. Nitrogen, P, K, and lime and severe pruning increased the resistance of macerated fresh fruit to browning. Soil profile modification and Mg application lowered browning resistance. Application of N or lime increased soluble solids in the fruit, but deep tillage decreased them. Soluble solids were higher when pruning was either less or more severe than that normally practiced. Titratable acidity was positively related to the application of P and K, but was decreased by N application. Application of K or lime increased pH whereas changing the N supply yielded inconclusive results. The soluble amino acids of the fruit were positively related to N supply and were reduced by K application. Interrelations of treatment effects upon the various components are discussed.

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