Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Uniwersytetu Przyrodniczego we Wrocławiu, ISSN 1505-0297

Rosa R. , Jabłońska-Ceglarek R. 2008. THE CONSECUTIVE EFFECT OF USING GREEN MANURE FORECROPS AND MANURE IN ‘BLIZZARD’ LEEK (Allium ampeloprasum ssp. porrum) CULTIVATION, EJPAU 11(2), #22.
Available Online: http://www.ejpau.media.pl/volume11/issue2/abs-22.html

ABSTRACT

A field experiment was conducted in the years 2003-2005. It studied the consecutive effect of green manure forecrops and the growth of ‘Blizzard’ leek. Leek was cultivated in the second year after organic fertilization. Sugar maize cultivated directly after ploughing in organic fertilizers was the forecrop for leek. The plants intended for green manure were sown during the first 10 days of April , and they were ploughed in during the first 10 days of June in the years 2002-2004. The following were used as green manures under sugar maize: oats, field pea and spring vetch as well as a mixture of these plants ploughed in as a whole or as aftercrop residue. Manure was introduced into the soil in the dose of 25 t ha^-1. Greater yields were obtained after ploughing in the whole biomass of the forecrops than in case of aftercrop residue. The greatest consecutive production effect, measured with the increase of the commercial yield of leek in comparison to the cultivation without organic fertilization, was characteristic of green manures in the form of whole plants of field pea and spring vetch as well as mixtures of oats with spring vetch. The commercial yield of leek obtained after them was also significantly higher than after manure. The other green manures had the yield-forming consecutive effect similar to manure. The ploughed in aftercrop residue of the forecrops were characterized by a similar consecutive production effect to that of manure. The leeks cultivated after the mixture of oats with field pea ploughed in under maize were characterized by the white part of greater weight than those cultivated after green manures of oats and a mixture of oats with field pea, and of greater weight than those cultivated in the control object without any organic fertilization.

Key words: organic fertilization, green manures, forecrops, manure, leek, yield.

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Robert Rosa
Department of Vegetable Crops,
Podlasie University in Siedlce, Poland
14 B. Prusa Street, 08-110 Siedlce, Poland
Phone: (+48 25) 643 12 76
email: robro@ap.siedlce.pl

Romualda Jabłońska-Ceglarek
Department of Vegetable Crops,
Podlasie University in Siedlce, Poland
14 B. Prusa Street, 08-110 Siedlce, Poland
Phone: (+48 25) 643 12 76
email: rjablon@ap.siedlce.pl

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