ISHS Acta Horticulturae 383: Mineral Nutrition of Deciduous Fruit Plants
EFFECTS OF PRE-PLANTING P FERTILIZATION IN SOUR CHERRY ORCHARDS |
| Authors: | A. Sadowski, E. Jadczuk, B. Jurczak |
| Keywords: | soil P content, recovery ratio, leaf P content, tree growth, yield |
| Abstract:
In two field trials on sour cherry trees, applications of superphosphate before planting resulted in small significant increases in available soil P content. P recovery ratio, 6 or 4 years after treatment was between 11 and 18%. The effects were more pronounced in a relatively light (sandy loam) acidic or slightly acidic soil than in a heavier (loamy) soil, which had a pH close to neutral. Phosphorus fertilization did not significantly increase leaf P concentration which remained stable and within the optimal range. Pre-planting P fertilization had no effect on tree growth or yield. It was concluded that no response from P fertilization in a sour cherry orchard occurs when the surface soil contains more than 20 μg of available P per g. In one trial, NKMg fertilization, applied as supplementary factor, significantly enhanced tree growth and increased yields. When trees were grown on Mahaleb stock, their yield depended on the scion, being higher for 'Schattenmorelle' than for 'North Star'. In another trial, yield of 'Schattenmorelle' depended on rootstock, being higher on Mazzard than on Mahaleb. | |
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