Research Article
Influence of Plant Population and Nitrogen-Fertilizer at Various Levels on Growth and Growth Efficiency of Maize
Table 2
Effect of N-fertilizer and plant density on SPAD value and N-content in maize leaf at different growth stages.
| | Interaction of population and N-fertilizer (000’ No./ha × kg/ha) | 60 DAS | 75 DAS | 90 DAS | 105 DAS | | SPAD value | % N-content | SPAD value | % N-content | SPAD value | % N-content | SPAD value | % N-content |
| | 46.8 | 2.9 | 44.5 | 2.1 | 8.2 | 1.3 | 5.6 | 0.87 | | 48.7 | 2.9 | 46.0 | 2.1 | 9.3 | 1.4 | 5.7 | 0.88 | | 47.6 | 3.0 | 47.9 | 2.2 | 9.6 | 1.5 | 7.2 | 0.92 | | 50.5 | 3.1 | 49.3 | 2.4 | 12.6 | 1.5 | 9.0 | 1.15 | | 42.9 | 2.7 | 45.3 | 1.7 | 7.3 | 1.3 | 4.9 | 0.85 | | 43.7 | 2.8 | 45.7 | 2.0 | 7.9 | 1.4 | 5.4 | 0.87 | | 46.0 | 2.9 | 46.6 | 2.1 | 8.1 | 1.5 | 5.5 | 0.91 | | 46.7 | 3.1 | 49.0 | 2.6 | 10.8 | 1.6 | 6.7 | 1.12 | | 39.3 | 2.7 | 45.2 | 1.6 | 5.7 | 1.2 | 4.2 | 0.8 | | 41.2 | 2.8 | 43.7 | 2.0 | 6.8 | 1.3 | 4.8 | 0.85 | | 42.9 | 2.8 | 46.3 | 2.1 | 7.7 | 1.4 | 5.3 | 0.88 | | 46.3 | 3.0 | 47.5 | 1.7 | 9.7 | 1.4 | 5.9 | 1.1 | | LSD (0.05) | 1.72 | NS | NS | 0.15 | 0.41 | 0.16 | 0.99 | 0.06 | | CV (%) | 3.2 | 4.6 | 2.2 | 5.4 | 2.7 | 5.1 | 9.9 | 4.7 |
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DAS: days after sowing; SPAD: soil-plant-analysis development; NS: not significant; LSD: least significant difference; CV: coefficient of variation.
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