Variation in Leaf Calcium in a Range of Apple Rootstocks
DOI:
https://doi.org/10.71318/apom.1987.41.1.13Keywords:
Apple rootstocks, leaf calcium, genetic variation, year to year environmental variation, breedingAbstract
Forty-nine apple rootstocks were analysed for leaf calcium over 6 years. They showed marked differences in consistency of calcium levels over years. The results are discussed in relation to breeding and selection of improved genotypes.
It has long been established that calcium nutrition and storage disorders of apples are related (1). More recently the subject of calcium nutrition in fruit trees has been reviewed by Vang-Petersen (10) who suggests that the concentration of calcium in the soil seldom limits uptake by roots. The view is largely supported Shear (5). Kennedy, et al. (4) have shown that the ability of apple rootstocks to utilise the available calcium is strongly influenced by genotype and environmental conditions.
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