Growth and Mineral Composition of Newly Planted Apple Trees Following Fertigation with N and

u a h h Abstract. Newly planted ‘Jonagold’ and ‘McIntosh’ apple (Malus domestica Borkh.) on M.26 fertigated with Ca(N03)2 showed increased early tree vigor and leaf Ca concentration but decreased leaf Mg and Mn compared to trees fertigated with urea or NH4N03. Fertigation with P increased early tree vigor, leaf and fruit P concentration, and decreased leaf Mn in the first year relative to a single planting hole application of granular P. Increased fruit Ca concentration in ‘Jonagold’ in one year was associated with the use of Ca(N03)2 and fertigation of P. Fruit quality was generally unaffected by the experimental treatments.

[1]  R. Haynes,et al.  Principles of fertilizer use for trickle irrigated crops , 1985, Fertilizer research.

[2]  G. Neilsen,et al.  Soil Disinfection and Monoammonium Phosphate Fertilization Increase Precocity of Apples on Replant Problem Soils , 1991 .

[3]  J. Huguet,et al.  Fertilization scheduling in peach orchards under trickle irrigation , 1991 .

[4]  G. Neilsen,et al.  Flowering of Apple Trees in the Second Year Is Increased by First- year P Fertilization , 1990 .

[5]  P. Hoyt.  The relationship of internal bark necrosis in ‘delicious’ apples to tree characteristics and soil properties , 1988 .

[6]  I. Klein,et al.  Fertigation of apples with nitrate or ammonium nitrogen under drip irrigation. I. tree performance , 1987 .

[7]  P. Lidster,et al.  Effects of phosphate sprays on McIntosh apple fruit and leaf composition, flesh firmness and susceptibility to low-temperature disorders , 1986 .

[8]  S. S. Miller,et al.  Influence of Various Rates of Ca(NO3)2 Fertilizer and Soil Management on Young Apple Trees , 1985, Journal of the American Society for Horticultural Science.

[9]  O. Lau.  Effects of Storage Procedures and Low Oxygen and Carbon Dioxide Atmospheres on Storage Quality of ‘Spartan’ Apples , 1983, Journal of the American Society for Horticultural Science.

[10]  D. C. Staiff,et al.  Effect of rate and source of nitrogen fertilizers on mineral composition of d'Anjou pears , 1983 .

[11]  W. J. Lord,et al.  Soil, Tree, and Fruit Responses to Lime and to Type and Timing of Nitrogenous Fertilizer Applications under ‘Sturdeespur Delicious’ Apple trees1 , 1981, Journal of the American Society for Horticultural Science.

[12]  Michael W. Smith,et al.  The Response of Fruit Trees to Injection of Nitrogen through a Trickle Irrigation System1 , 1979, Journal of the American Society for Horticultural Science.

[13]  K. Higgs,et al.  Trickle Irrigation of Apple Trees and the Effects of Liquid Feeding with NO3− and K+ Compared with Normal Manuring , 1978 .