Table 2.
Effect of different planting patterns on total nitrogen accumulation (TNA, kg ha−1), total phosphorus accumulation (TPA, kg ha−1), and total potassium accumulation (TKA, kg ha−1) in maize and soybean at different locations under relay intercropping system.
| Years | Treatments | Maize | Soybean | |||||
|---|---|---|---|---|---|---|---|---|
| TNA | TPA | TKA | TNA | TPA | TKA | |||
| 2012 | Planting Patterns | SI | 173.1ab | 34.1a | 260.9b | 90.6c | 16.8c | 29.9c |
| SII | 169.1b | 29.8b | 246.1c | 162.8b | 29.1b | 58.5b | ||
| SM | 175.5a | 30.9b | 271.8a | — | — | — | ||
| SS | — | — | — | 187.7a | 36.8a | 72.2a | ||
| LSD (0.05) | 4.65 | 1.28 | 4.43 | 3.32 | 1.41 | 2.75 | ||
| Locations | Yaan | 202.6a | 39.3a | 297.4a | 150.2b | 27.1b | 54.9 | |
| Renshou | 168.7b | 30.8b | 243.8b | 152.9a | 28.0b | 53.8 | ||
| Lezhi | 146.4c | 24.7c | 237.5c | 138.1c | 28.6a | 51.9 | ||
| LSD (0.05) | 6.52 | 1.50 | 3.23 | 2.45 | 0.82 | NS | ||
| 2013 | Planting Patterns | SI | 204.4a | 34.9a | 169.6b | 112.5c | 12.5c | 59.5c |
| SII | 196.3b | 32.9b | 155.4b | 178.2b | 18.7b | 92.2b | ||
| SM | 206.3a | 34.6a | 173.7 | — | — | — | ||
| SS | — | — | — | 223.3a | 26.1a | 128.2a | ||
| LSD (0.05) | 4.57 | 0.98 | 3.20 | 2.70 | 0.86 | 2.02 | ||
| Locations | Yaan | 146.7c | 28.4c | 108.2c | 147.7c | 14.5b | 64.5c | |
| Renshou | 189.3b | 39.7a | 221.2a | 173.2a | 21.1a | 125.1a | ||
| Lezhi | 271.2a | 34.3b | 180.3b | 173.1b | 21.8a | 90.3b | ||
| LSD (0.05) | 5.51 | 2.61 | 4.95 | 2.63 | 1.50 | 2.41 | ||
The SI (50 cm: 50 cm) and SII (40 cm: 160 cm) represent the different planting patterns under relay-intercropping system. The SM and SS refer to sole cropping system of maize and soybean, respectively. Means are averaged over three replicates. Means do not share the same letters in the column differ significantly at p ≤ 0.05; NS = Non-significant.