New Zealand Journal of Crop and Horticultural Science
abstracts
Fruit mineral removal rates from New Zealand apple (Malus domestica) orchards
in the Nelson region
J. W. Palmer
The Horticulture and Food Research Institute
of New Zealand
Nelson Research Centre
P.O. Box 220
Motueka, New Zealand
email: jpalmer@hortresearch.co.nz
G. Dryden
Fruition Horticulture
Richmond
Nelson, New Zealand
Abstract Total picked yields and whole fruit mineral analyses just
before harvest were recorded from seven apple (Malus domestica) orchards
over the Nelson region of New Zealand over 2–3 years from mature trees
of ‘Braeburn’, ‘Cox’, ‘Fuji’,
and ‘Royal Gala’ as part of the Nelson Focus Orchard Project. Estimated
mean fruit nutrient removal rates for a 70 t ha–1 picked yield of apples
were 82 kg ha–1 potassium, 31 kg ha–1 nitrogen, 7 kg ha–1
phosphorus, and both calcium and magnesium at c. 4 kg ha–1 per year.
These results are discussed in relation to fertiliser inputs and previous reports
of nutrient removal for other cultivars and locations, both in New Zealand
and overseas.
Keywords fruit mineral content; nitrogen; potassium; phosphorus
New Zealand Journal of Crop and Horticultural Science, 2006, Vol.
34: 27–32
0014–0671/06/3401–0027 © The Royal
Society of New Zealand 2006
H05009; Online publication date 19 January 2006
Received 27 January 2005; accepted 11 November 2005
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