Table 3.
Effect of different nutrient managements and weeding regimes on nutrient uptake by major weeds (kg ha−1) at 60 DAS in hybrid maize.
| Treatments | Nutrient Uptake by Major Weeds (kg ha−1) at 60 DAS | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A. arvensis | C. rotundus | V. hirsuta | ||||||||||||||||
| Nitrogen | Phosphorus | Potassium | Nitrogen | Phosphorus | Potassium | Nitrogen | Phosphorus | Potassium | ||||||||||
| Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | |
| Nutrient Management | ||||||||||||||||||
| RDF | 17.36 | 9.34 | 2.31 | 1.24 | 1.44 | 0.78 | 16.04 | 4.86 | 1.99 | 0.60 | 1.48 | 0.45 | 0.77 | 2.62 | 0.15 | 0.50 | 0.07 | 0.25 |
| RDF + FYM | 15.02 | 11.94 | 2.00 | 1.59 | 1.25 | 0.99 | 15.34 | 4.66 | 1.91 | 0.58 | 1.41 | 0.43 | 0.47 | 2.42 | 0.09 | 0.46 | 0.05 | 0.23 |
| RDF + VC | 15.79 | 8.05 | 2.10 | 1.07 | 1.31 | 0.67 | 15.88 | 5.04 | 1.97 | 0.63 | 1.46 | 0.46 | 0.62 | 2.54 | 0.12 | 0.48 | 0.06 | 0.24 |
| RDF + BSM | 14.31 | 6.21 | 1.90 | 0.82 | 1.19 | 0.52 | 16.00 | 3.18 | 1.99 | 0.40 | 1.47 | 0.29 | 0.57 | 2.16 | 0.11 | 0.41 | 0.06 | 0.21 |
| RDF + NC | 14.45 | 6.20 | 1.92 | 0.82 | 1.20 | 0.52 | 18.32 | 4.74 | 2.28 | 0.59 | 1.69 | 0.44 | 0.88 | 1.75 | 0.17 | 0.33 | 0.08 | 0.17 |
| SEm ± | 2.93 | 0.96 | 0.39 | 0.13 | 0.24 | 0.08 | 3.07 | 0.81 | 0.38 | 0.10 | 0.28 | 0.08 | 0.19 | 0.27 | 0.04 | 0.05 | 0.02 | 0.03 |
| CD (p ≤ 0.05) | 8.48 | 2.79 | 1.13 | 0.37 | 0.70 | 0.23 | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS |
| Weeding Regimes | ||||||||||||||||||
| Weedy check | 44.83 | 24.05 | 5.96 | 3.20 | 3.73 | 2.00 | 21.08 | 5.89 | 2.62 | 0.73 | 1.94 | 0.54 | 1.48 | 4.48 | 0.28 | 0.85 | 0.14 | 0.43 |
| Chemical weed management | 0.69 | 0.72 | 0.09 | 0.10 | 0.06 | 0.06 | 23.20 | 6.04 | 2.89 | 0.75 | 2.14 | 0.56 | 0.46 | 1.81 | 0.09 | 0.35 | 0.04 | 0.17 |
| Integrated weed management | 0.65 | 0.26 | 0.09 | 0.04 | 0.05 | 0.02 | 4.66 | 1.56 | 0.58 | 0.19 | 0.43 | 0.14 | 0.05 | 0.61 | 0.01 | 0.12 | 0.01 | 0.06 |
| SEm ± | 2.27 | 0.75 | 0.30 | 0.10 | 0.19 | 0.06 | 2.38 | 0.63 | 0.30 | 0.08 | 0.22 | 0.06 | 0.15 | 0.21 | 0.03 | 0.04 | 0.01 | 0.02 |
| CD (p ≤ 0.05) | 6.57 | 2.16 | 0.87 | 0.29 | 0.55 | 0.18 | 6.90 | 1.83 | 0.86 | 0.23 | 0.64 | 0.17 | 0.43 | 0.60 | 0.08 | 0.11 | 0.04 | 0.06 |
RDF: 100% recommended dose (RD) of NPK through fertilizer, RDF + VC: 25% RDN through VC, RDF + FYM: 25% RDN through FYM, RDF + BSM: 25% RDN through BSM, RDF + NC: 25% RDN through NC, Weedy check: Un-weeded control, Chemical weed management: Atrazine 1000 g/ha at 2 DAS, Integrated weed management: Atrazine 1000 g ha−1 at 2 DAS followed by mechanical weeding at 30 DAS. SEm, Standard error of mean; CD, Critical difference; NS, Non-significant.