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Performance of tropical maize hybrids under conditions of low and optimum levels of nitrogen fertilizer application – grain yield, biomass production and nitrogen accumulation
Nitrogen (N) is the most limiting mineral nutrient in the soils of the major maize producing areas of West and Cen¬tral Africa. Low soil N and sub-optimal application of N fertilizers lead to N deficiency and poor grain yield (GY) in maize. Maize varieties with improved grain yield under low soil N...
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2013
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| LEADER | 00000njm a2000000a 4500 | ||
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| 001 | oai:repository.ui.edu.ng:123456789/11456 | ||
| 042 | |a dc | ||
| 720 | |a Abe, A. |e author | ||
| 720 | |a Adetimirin, V. O. |e author | ||
| 720 | |a Menkir, A. |e author | ||
| 720 | |a Moose, S. P. |e author | ||
| 720 | |a Olaniyan, A. B. |e author | ||
| 260 | |c 2013 | ||
| 520 | |a Nitrogen (N) is the most limiting mineral nutrient in the soils of the major maize producing areas of West and Cen¬tral Africa. Low soil N and sub-optimal application of N fertilizers lead to N deficiency and poor grain yield (GY) in maize. Maize varieties with improved grain yield under low soil N and increased performance under optimal N availability could be beneficial to low input agriculture. This study evaluated the performance of a selection of ex¬perimental and commercial hybrids under suboptimal and optimal N fertilizer applications. Significant differences were observed among the hybrids, as well as significant interactions between hybrid and N level for GY and other measured attributes, with the severity of variation increasing as the level of N decreases. Mean GY reductions across the years was 76.5% at no-N and 35.4% at low-N. Depending on N treatment, GY varied from 0.48 to 4.42 Mg ha-1, grain N content from 0.17 to 1.26 g plant-1, total N content at harvest from 0.33 to 2.00 g plant-1, above ground biomass at silking from 30.6 to 91.2 g plant-1 and at maturity from 39.9 to 191.1 g plant-1. Number of kernels was the GY component most severely reduced by N stress and had significant (p ≤ 0.001) positive correlation with GY at all N levels. Six hybrids (4001/4008, KU1409/4008, KU1409/9613, 4008/1808, 4058/Fun 47-4, and 1824/9432) which showed consistent above average grain yields under no-N, low-N, high-N and across N levels were found and their use could further be investigated. | ||
| 024 | 8 | |a 2279-8013 | |
| 024 | 8 | |a ui_art_abe_performance_2013 | |
| 024 | 8 | |a Maydica 58, pp. 141-150 | |
| 024 | 8 | |a https://repository.ui.edu.ng/handle/123456789/11456 | |
| 653 | |a Maize hybrids | ||
| 653 | |a Grain yield | ||
| 653 | |a Number of kernels | ||
| 653 | |a Low soil N | ||
| 653 | |a Low input agriculture | ||
| 245 | 0 | 0 | |a Performance of tropical maize hybrids under conditions of low and optimum levels of nitrogen fertilizer application – grain yield, biomass production and nitrogen accumulation |