EJPAU 2007. Prusiński J. CONTENT AND BALANCE OF NITROGEN IN FABA BEAN FERTILIZED WITH AMMONIUM NITRATE AND FED ADDITIONALLY WITH UREA

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.

2007
Volume 10
Issue 4

Topic:

Agronomy

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Prusiński J. 2007. CONTENT AND BALANCE OF NITROGEN IN FABA BEAN FERTILIZED WITH AMMONIUM NITRATE AND FED ADDITIONALLY WITH UREA, EJPAU 10(4), #24.
Available Online: http://www.ejpau.media.pl/volume10/issue4/abs-24.html

CONTENT AND BALANCE OF NITROGEN IN FABA BEAN FERTILIZED WITH AMMONIUM NITRATE AND FED ADDITIONALLY WITH UREA

Janusz Prusiński
Department of Agrotechnology, Faculty of Agriculture and Biotechnology, UTP University of Science and Technology, Bydgoszcz, Poland

ABSTRACT

A strict two-factor field experiment was carried out as a randomized complete block design at the Mochełek Research Station on very good rye complex soil over 2004-2006. The subject of the experiment was cultivar ‘Bobas’ and the investigated factors were fertilization (entirely pre-sowing) and additional feeding (in four equal parts) of plants with N in doses 0, 30, 60 and 90 kg N·ha^-1. At five developmental stages right before foliar additional feeding that is of 8-10 leaves, at the beginning of budding and flowering, at the end of flowering and in the physiological maturity of seeds, the content of total N was determined in upper leaves with the Kjeldahl method, just as in stems, pod-shells and seeds directly after harvesting. Chlorophyll content at the same stages on 30 youngest leaves from every plot was determined using Minolta chlorophyllmeter. Additionally, harvest index, the effectiveness of the applied N doses and their utilization by faba bean plants were calculated. Forms and doses of mineral nitrogen except for highest ones did not differentiate significantly the content of total N in faba bean leaves during vegetation or in stems and pod-shells after harvesting. N dose of at least 30 kg in ammonium nitrate or 90 kg in urea were the condition for obtaining a high content of N in seeds. Neither N form nor dose influenced significantly chlorophyll content in leaves. The dose of 90 kg N·ha^-1in ammonium nitrate and 30-90 kg N·ha^-1 in urea and from 60 to 180 kg N·ha^-1in ammonium nitrate and urea increased significantly, as compared to the control (with no fertilization or additional feeding) the amount of N received with seed yield and jointly by above-ground parts (stems, pod-shells and seeds). The most advantageous for the studied effectiveness indexes of the applied nitrogen was foliar additional feeding, although only harvest index and the effectiveness of N utilization from the soil, fertilizers and symbiotically fixed nitrogen were not diversified by the form of mineral N and its application technique.

Key words: faba bean, soil fertilization and plant feeding with N, N content, N balance.

Janusz Prusiński
Department of Agrotechnology, Faculty of Agriculture and Biotechnology, UTP University of Science and Technology, Bydgoszcz, Poland
Kordeckiego St. 20
85-225 Bydgoszcz
Poland
email: janusz.prusinski@utp.edu.pl

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