TABLE 1.
Soil properties of the banana field under different nitrogen fertilization rates.
| Treatment | Urease (mg⋅g–1 soil⋅24 h–1) | Invertase (mg⋅g–1 soil⋅24 h–1) | AP (mg⋅g–1 soil⋅24 h–1) | Available N content (mg⋅kg–1) | Available K content (mg⋅kg–1) | Available P content (mg⋅kg–1) | SOM content (g⋅kg–1) |
| TCK | 835.31 (54.51)d | 3.49 (0.02)d | 12.24 (0.40)c | 36.17 (1.17)b | 32.62 (1.56)f | 25.74 (0.21)f | 2.14 (0.05)a |
| N0 | 910.66 (18.65)cd | 4.21 (0.22)cd | 22.95 (0.63)a | 46.08 (1.17)a | 52.46 (1.95)c | 57.36 (1.86)c | 2.31 (0.08)a |
| N14 | 1171.57 (29.84)a | 4.75 (0.26)abc | 21.70 (0.55)a | 49.58 (2.10)a | 44.67 (1.16)e | 173.04 (1.63)a | 2.29 (0.04)a |
| N248 | 989.07 (25.31)b | 4.91 (0.16)abc | 17.93 (0.46)b | 48.42 (0.58)a | 86.26 (1.02)b | 83.33 (1.36)b | 2.13 (0.06)a |
| N352 | 1213.43 (29.58)a | 5.20 (0.15)ab | 12.47 (0.55)c | 50.17 (1.17)a | 103.26 (2.32)a | 51.67 (0.21)d | 2.33 (0.03)a |
| N455 | 1071.73 (16.31)ab | 5.37 (0.02)a | 13.62 (0.44)c | 51.33 (1.54)a | 67.73 (0.98)c | 31.77 (0.34)e | 2.30 (0.06)a |
| NFT | 901.61 (12.78)cd | 4.51 (0.04)bc | 11.35 (0.53)c | 46.67 (1.17)a | 67.41 (0.78)d | 28.45 (0.51)ef | 2.19 (0.06)a |
Means (SE) followed by the different letters in a same column are significantly different at p < 0.05 (Tukey’s test). AP, Acid phosphatase; N, nitrogen; K, potassium; P, phosphorus; SOM, soil organic matter; TCK, control. NFT: chemical fertilization rate used by local farmers.