Article Abstract

Volume 24, No. (3), 2014 (June)
AGRONOMIC AND NITROGEN RECOVERY EFFICIENCY OF RICE UNDER TROPICAL CONDITIONS AS AFFECTED BY NITROGEN FERTILIZER AND LEGUME CROP ROTATION
M. M. Rahman*, M. A. Islam, M. S. Azirun and A. N. Boyce

M. M. Rahman*, M. A. Islam, M. S. Azirun and A. N. Boyce

Institute of Biological Sciences, Faculty of Science, University of Malaya
Kuala Lumpur, Malaysia

DOI: NA
Page Number(s): 891-896
Published Online First: June 01, 2014
Publication Date: June 01, 2014
ABSTRACT

Nitrogen is one of the most limiting factors for crop growth and productivity. However excessive application can lead to low N efficiency, higher production costs and environmental pollution. Winged bean, bush bean and rice crop plants were grown in a greenhouse with different rates of N fertilizer to estimate nitrogen agronomic efficiency (NAE), nitrogen recovery efficiency (NRE) and N uptake of rice when tropical two vegetable legume plants were grown in rotation with rice crop. Bush bean and winged bean were grown with N fertilizer at rates of 0, 2, 4 and 6 g m-2 preceding rice planting while rice was grown with N fertilizer at rates of 0, 4, 8 and 12 g m-2. Rice after winged bean grown with N at the rate of 4 g N m-2 achieved significantly higher NRE (30-33%) and NAE (24-27 g g-1) during both years. This prevailing effect of rice after winged bean is likely associated with higher biomass and N uptake during both years. Data from two growing seasons showed that rice after winged bean at the rate of 4 g m-2 can produce higher biomass and N accumulation of rice along with superior NRE and NAE values, which indicated a positive response for rice production without deteriorating soil fertility.

Keywords: Nitrogen efficiency, Nitrogen uptake, Legume residue
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JCR Year: 2025

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Print ISSN: 1018-7081

Electronic ISSN: 2309-8694

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