Table 1. Effect of different nutrient sources and weed management practices on weed growth and nutrient uptake.
| Treatment | Weed density (no·m-2) | Weed dry weight (g·m-2) | Nutrient uptake (kg·ha-1) by weeds at 60 DAT | ||||
|---|---|---|---|---|---|---|---|
| 30 DAT | 60 DAT | 30 DAT | 60 DAT | N | P | K | |
| Year | |||||||
| Year 1 | 125a | 95a | 8.52a | 42.3a | 9.04a | 0.65a | 1.00a |
| Year 2 | 88b | 88a | 6.83b | 38.9b | 8.34b | 0.60b | 0.93b |
| Nutrient management | |||||||
| Fert100 | 111ab | 103a | 7.74a | 44.4a | 9.50a | 0.68a | 1.06a |
| Fert75-VC25 | 124a | 96a | 7.45a | 47.1a | 10.21a | 0.73a | 1.12a |
| Fert75-FYM25 | 116a | 106a | 8.24a | 45.4a | 9.75a | 0.70a | 1.08a |
| Fert75-BSM25 | 87c | 77b | 7.45a | 33.0b | 7.05b | 0.51b | 0.78b |
| Fert75-NC25 | 93bc | 78b | 7.50a | 32.9b | 6.93b | 0.50b | 0.78b |
| Weed management | |||||||
| Weedy | 293a | 287a | 15.73a | 102.8a | 22.11a | 1.59a | 2.47a |
| Herbicide | 51b | 39b | 3.99b | 10.6b | 2.20b | 0.16b | 0.24b |
| Integrated | 43b | 31c | 3.30b | 8.3b | 1.75b | 0.12b | 0.19b |
| Source of variation | |||||||
| Year | *** | ns | *** | ** | ** | ** | * |
| NM | *** | *** | ns | *** | *** | *** | *** |
| WM | *** | *** | *** *** | *** | *** | *** | *** |
| Year × NM | ns | ns | ns | ns | ns | ns | ns |
| Year × WM | ns | ns | ns | ns | * | ns | ns |
| NM× WM | ns | *** | ns | *** | *** | *** | *** |
| Year × NM × WM | ns | ns | ns | ns | ns | ns | ns |
NM, nutrient management; WM, weed Management; N, nitrogen; P, phosphorus; K, potassium; VC, vermicompost; FYM, farmyard manure; BSM, brassicaceous seed meal; NC, neem cake; Fert100, full dose of N,P and K through fertilizer; Fert75-VC25, 75% of N and 100% of P and K through fertilizer with 25% N through VC; Fert75-FYM25, 75% of N and 100% of P and K through fertilizer with 25% N through FYM; Fert75-BSM25, 75% of N and 100% of P and K through fertilizer with 25% N through BSM; Fert75-NC25, 75% of N and 100% of P and K through fertilizer with 25% N through NC; Weedy, no weeding; herbicide, bispyribac-sodium 25 g/ha at 15 DAT fbmetsulfuron methyl + chlorimuron ethyl (2+2) g/ha at 30 DAT; Integrated, bensulfuron methyl + pretilachlor (60+600) g/ha at 5 DAT fb MW at 30 DAT; DAT, days after transplanting; Within year, nutrient and weed management, numbers followed by different letter indicate significant differences at p≤0.05 (otherwise statistically at par); ns, non-significant (p> 0.05)
*, ** and *** indicate significance at p < 0.05, 0.01 and 0.001, respectively.