Yield and nitrogen uptake of white cabbage (Brassica oleracea var. capitata) with organic and inorganic fertilisers

L. M. Brito*, A. L. Amaro, I. Mourão, L. Moura

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

To improve fertilisation recommendations in organic farming systems and nitrate vulnerable zones, the response of white cabbage to the application of increasing rates of mineral N (0, 90 and 180 kg ha-1) fertiliser in combination with increasing rates (0, 20 and 40 t ha-1) of an organic fertiliser from the composting process (182 days) of the solid fraction (SF) of dairy cattle slurry, was assessed in the summer season in NW Portugal. Cabbage yield was strongly related to mineral N application with an N recovery rate over 70%, but was not associated to SF compost application, except for treatments without mineral N fertilisation where cabbage dry weight increased (P<0.05) from 7.4 t ha-1 in the control treatment to 9.4 t ha-1 with the application of 40 t ha-1 of compost, whilst N uptake increased 64 kg ha-1. This investigation showed that the SF compost had a high rate of N mineralisation after soil application and that its fertilising effect is related to N availability from mineral fertilisation. Therefore, SF composts may have increased application as a soil fertiliser on low input farming systems such as organic farming.

Original languageEnglish
Title of host publicationXXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010)
Subtitle of host publicationInternational Symposium on Organic Horticulture: Productivity and Sustainability
PublisherInternational Society for Horticultural Science
Pages107-114
Number of pages8
ISBN (Print)9789066051393
DOIs
Publication statusPublished - 31 Mar 2012
Externally publishedYes

Publication series

NameActa Horticulturae
Volume933
ISSN (Print)0567-7572

Keywords

  • Ammonium nitrate
  • Compost
  • Slurry solid fraction

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