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Influence of Plant Population and Nitrogen-Fertilizer at Various Levels on Growth and Growth Efficiency of Maize

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(−1) corresponding to spacings of 75 × 25, 60 × 25, and 50 × 25 cm) and 4 doses of N (100,...

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Detalles Bibliográficos
Autores principales: Tajul, M. I., Alam, M. M., Hossain, S. M. M., Naher, K., Rafii, M. Y., Latif, M. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3791691/
https://www.ncbi.nlm.nih.gov/pubmed/24163615
http://dx.doi.org/10.1155/2013/193018
Descripción
Sumario: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(−1) corresponding to spacings of 75 × 25, 60 × 25, and 50 × 25 cm) and 4 doses of N (100, 140, 180, and 220 kg ha(−1)) 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(−1) receiving 220 kg N ha(−1), 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(−1)). 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(−1) with 80,000 plants ha(−1) had larger foliage, greater SPAD value, and higher amount of grains cob(−1) that contributed to the maximum yield (5.03 t ha(−1)) and the maximum harvest index (HI) compared to the plants in other treatments.