Effect of integrated weed management on nutrient uptake by weeds and yield of gladiolus (Gladiolus hybridus Hort.)

An experiment was conducted to study nutrient uptake and yield of gladiolus as affected by integrated weed management cv. Pusa Srijna. A set of eleven integrated treatments laid out in simple randomized block design with three replications. The results revealed that maximum uptake of nitrogen, phosphorus and potassium by weeds was 24.0, 8.9 and 25.6 kg/ha, respectively, in weedy check (T₁₁) and minimum uptake of nitrogen, phosphorus and potassium by weeds was 4.1, 1.2 and 6.6 kg/ha, respectively, in T₅, i.e. application of metribuzin 0.4 kg/ha pre-emergence + residue (dry grass 5 t/ha). The maximum uptake of nitrogen, phosphorus and potassium by gladiolus was 19.6, 6.7 and 25.4 kg/ha, respectively, in weed free check (T₁₀) and minimum uptake of nitrogen, phosphorus and potassium by gladiolus was 7.1, 2.6 and 15.4 kg/ha, respectively, in weedy check (T₁₁). The yield of corms, cormels and number of marketable spikes/ha, net profit and benefit cost ratio was received maximum with the application of metribuzin 0.4 kg/ha preemergence + residue (dry grass 5.0 tonnes/ha).