Table 1 Soil chemical properties; pH, nitrogen (N), phosphorus (P) and potassium (K) under no straw return (A), straw return under decomposition agent (B) and straw return under no decomposition agent (C)
Soil properties | Treatments | Time (days) | ||||
|---|---|---|---|---|---|---|
0 | 20 | 40 | 60 | 90 | ||
pH | A | 7.1a | 7.3b | 7.8a | 7.65a | 6.85a |
B | 7.2a | 7.65a | 7.6ab | 7.4a | 6.9a | |
C | 7.15a | 7.25b | 7.35b | 7.45a | 6.65b | |
N (mg/kg) | A | 13.33b | 9.24c | 10.59a | 5.7c | 13.18b |
B | 15.08a | 9.81b | 9.77b | 7.03b | 9.25c | |
C | 14.19ab | 11.05a | 10.32a | 9.75a | 16.33a | |
P (mg/kg) | A | 3.04a | 2.16a | 3.81a | 4.91a | 6.8b |
B | 3.33a | 2.54b | 2.83b | 4.83a | 7.39a | |
C | 3.18a | 2.89a | 2.86b | 2.44b | 7.37a | |
K (mg/kg) | A | 123.8a | 61.56b | 49.35b | 30.81a | 45.11b |
B | 139.5a | 94.47a | 52.24ab | 14.45b | 54.45a | |
C | 96.77b | 46.68c | 55.3a | 13.65b | 42.84c | |