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Lower nitrogen supply gave better fruit quality in organic apples

Pedersen, Senior scientist Hanne Lindhard and Bertelsen, Senior scientist Marianne (2002) Lower nitrogen supply gave better fruit quality in organic apples. In: NJF website: www.njf.dk, NJF.

[thumbnail of Lower_nitrogen_sypply_gave_better_fruit_quality_in_organic_apples.pdf] PDF - English

Document available online at: http://www.njf.dk


The use of scab resistant apple varieties is the best way to prevent infections of apple scab (Venturia inaequalis). In 1995 the then 10 most promising resistant apple varieties for Denmark where planted at Research Centre Årslev, Denmark in an organic production system. Tree different cover crops where established in the allyways. Weed cleaning in the tree row was done mechanically and the trees were kept unfertilised.
The annual shoot growth, nutrients in leaf sample, mineralised nitrogen in soil, content of water in the upper 50 cm soil, fruit yield and fruit quality were assessed.
The best fruit quality due to colour, pest and disease damage was obtained in trees grown in permanent grass alley way system which gave a nitrogen sypply in the lower end of the optimum range. The resistance to apple scab was broken in most varieties. The varieties: 'Florina', 'Vanda', 'Redfree' and 'Retina' were less infected by apple scab.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:apple, nitrogen, fruit quality
Subjects: Crop husbandry > Production systems > Fruit and berries
Research affiliation: Denmark > DARCOF II (2000-2005) > I. 2 (ORGAPP) Sustainable production systems for apples
Deposited By: Fjord, Miss Camilla
ID Code:1718
Deposited On:27 Oct 2003
Last Modified:12 Apr 2010 07:28
Document Language:English
Refereed:Not peer-reviewed

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