Research Article
Effects of Different Rates of Poultry Manure and Split Applications of Urea Fertilizer on Soil Chemical Properties, Growth, and Yield of Maize
Table 2
Effects of poultry manure and split urea fertilizer on soil chemical properties.
| Split urea fertilizer (kg ha−1) | Poultry manure rate (t·ha−1) | pH (water) | OM (%) | N (%) | P (mg kg−1) | K (cmol kg−1) | Ca (cmol kg−1) | Mg (cmol kg−1) | Site I | Site II | Site I | Site II | Site I | Site II | Site I | Site II | Site I | Site II | Site I | Site II | Site I | Site II |
| Control | 0 | 5.70b | 5.59b | 2.08e | 2.02g | 0.14e | 0.13i | 6.50d | 4.22c | 0.18h | 0.26c | 0.76d | 2.12f | 0.50c | 0.43h | 4 | 5.84a | 6.71a | 2.89b | 3.50b | 0.16d | 0.14hi | 8.96b | 4.85a | 0.20fg | 0.52a | 1.15b | 2.42d | 0.57b | 1.64b | 8 | 5.89a | 6.78a | 2.99b | 3.60a | 0.16d | 0.15gh | 9.48a | 4.86a | 0.25d | 0.53a | 1.25a | 2.42d | 0.67a | 1.65b |
| 120 | 0 | 5.48e | 5.59b | 2.18cd | 2.21e | 0.16d | 0.20f | 6.51d | 4.68b | 0.19gh | 0.29b | 0.98c | 2.36e | 0.49c | 0.82g | 4 | 5.52d | 6.65a | 2.91b | 2.92c | 0.18c | 0.22e | 9.84a | 4.89a | 0.20e | 0.53a | 1.18b | 2.57c | 0.58b | 0.84g | 8 | 5.58d | 6.71a | 3.01ab | 2.30d | 0.19bc | 0.23d | 9.90a | 4.89a | 0.27c | 0.54a | 1.26a | 2.58c | 0.69a | 1.20e |
| 90 + 30 | 0 | 5.64cd | 5.58b | 2.21cd | 2.20ef | 0.18c | 0.25c | 6.53d | 5.25b | 0.28c | 0.30b | 0.77d | 2.45d | 0.49c | 0.99f | 4 | 5.74b | 6.48a | 3.07a | 3.63a | 0.19bc | 0.27b | 7.70cd | 5.77a | 0.31ab | 0.54a | 1.15b | 2.78b | 0.58b | 1.34d | 8 | 5.76b | 6.48a | 3.15a | 3.68a | 0.20b | 0.29ab | 8.06b | 5.79a | 0.33a | 0.54a | 1.17b | 2.78b | 0.68a | 1.64b |
| 60 + 30+30 | 0 | 5.74b | 5.60b | 2.22cd | 2.18f | 0.19bc | 0.29ab | 6.60d | 5.25b | 0.29b | 0.32b | 0.79d | 2.45d | 0.50c | 1.44c | 4 | 5.86a | 6.44a | 3.09a | 3.67a | 0.22ab | 0.31a | 9.98a | 5.79a | 0.32a | 0.56a | 1.28a | 2.86a | 0.61ab | 1.94a | 8 | 5.88a | 6.48a | 3.11a | 3.69a | 0.23a | 0.31a | 9.99a | 5.80a | 0.32a | 0.56a | 1.29a | 2.79b | 0.61ab | 1.94a |
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Values followed by similar letters under the same column are not significantly different at P = 0.05 according to Duncan’s multiple range test.
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