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The Scientific World JournalVolume 2013 2013, Article ID 193018, 9 pages

Research Article

Institute of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan

Department of Crop Botany, BSMR Agricultural University, Salna, Gazipur 1701, Bangladesh

Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia

Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia

Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

Received 26 June 2013; Accepted 6 August 2013

Academic Editors: A. Garcia y Garcia and E. Sivamani

Copyright © 2013 M. I. Tajul et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Field experiments were conducted to evaluate plant population and N-fertilizer effects on yield and yield components of maize Zea mays L

Three levels of plant populations 53000, 66000, and 800000 plants ha

corresponding to spacings of 75 × 25, 60 × 25, and 50 × 25 cm and 4 doses of N 100, 140, 180, and 220 kg ha

were the treatment variables. Results revealed that plant growth, light interception LI, yield attributes, and grain yield varied significantly due to the variations in population density and N-rates. Crop growth rate CGR was the highest with the population of 80,000 ha

receiving 220 kg N ha

, while relative growth rate RGR showed an opposite trend of CGR. Light absorption was maximum when most of densely populated plant received the highest amount of N 220 kg N ha

. Response of soil-plant-analysis development SPAD value as well as N-content to N-rates was found significant. Plant height was the maximum at the lowest plant density with the highest amount of N. Plants that received 180 kg N ha

with 80,000 plants ha

had larger foliage, greater SPAD value, and higher amount of grains cob

that contributed to the maximum yield 5.03 t ha

and the maximum harvest index HI compared to the plants in other treatments.





Autor: M. I. Tajul, M. M. Alam, S. M. M. Hossain, K. Naher, M. Y. Rafii, and M. A. Latif

Fuente: https://www.hindawi.com/



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