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The effect of orchard factors on the chemical composition of apples. III. Some effects of pruning and nitrogen application on Cox’s Orange Pippin fruit

1974; Taylor & Francis; Volume: 49; Issue: 1 Linguagem: Inglês

10.1080/00221589.1974.11514554

0022-1589

M. A. Perring, A. P. Preston,

Horticultural and Viticultural Research

SummarySamples of fruit from trees which had been spur pruned in winter or late summer, or regulated pruned, and which had also received nitrogen as ammonium sulphate in spring or sodium nitrate in late summer from 1968 onwards, were analysed in 1969 and 1970. Summer pruning raised the concentration of calcium but lowered that of potassium, phosphorus, nitrogen or dry matter. Large amounts of sodium nitrate applied in summer raised the concentration of calcium and phosphorus but not that of nitrogen. In samples within each treatment, magnesium and titratable acid concentrations were correlated with those of potassium, and calcium concentrations were negatively correlated with mean mass per apple.