EFFECT OF TILLAGE DEPTH AND MULCH MATERIALS ON WEED MANAGEMENT, YIELD ATTRIBUTES AND YIELD OF WHEAT

Abstract

The experiment were conducted during the period from November 2013 to March 2014 in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka to find out the effect of tillage depth and mulch materials on weed management, yield attributes and yield of wheat. The experiment comprised of two factors; Factor A: Tillage depth (4 levels)- T0: Control, T1: 3// depth, T2: 6// depth and T3: 9// depth and Factor B: Mulch materials (3 types)- M0: Control (no mulch), M1: Rice straw and M2: Black polythene. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Cyperous rotundus, Eleusine indica, Cynodon dactylon, Digitaria sanguinalis, Echinochloa colonum, Chenopodium album were found with major population among the 10 weed species in the experimental field. In the case of tillage depth, at 20 DAS the maximum number of weed population m-2 were recorded in T0 (14.00), while the minimum number in T3 (7.44). At 30, 40, 50, 60 DAS and at harvest, the longest plants were found from T3 (34.15, 55.60, 69.29, 91.67 and 106.76 cm, respectively), whereas the shortest plants from T0 (24.59, 37.50, 52.60, 75.96 and 92.94 cm, respectively). The highest grain yield were recorded from T3 (3.47 t ha-1), whereas the lowest from T0 (2.15 t ha-1). The highest straw yield were recorded from T2 (4.98 t ha-1), whereas the lowest from T0 (3.56 t ha-1). For mulch materials, at 20 DAS, the maximum numbers of weed population m-2 were found in M0 (13.50), while the minimum number in M2 (8.33). At 30, 40, 50, 60 DAS and at harvest, the longest plants were observed from M2 (32.99, 52.89, 65.93, 88.89 and 105.69 cm, respectively), while the shortest plants from M0 (27.90, 45.21, 60.11, 79.62 and 97.04 cm, respectively). The highest grain yield were found from M2 (3.25 t ha-1), while the lowest from M0 (2.81 t ha-1). The highest straw yield were found from M2 (4.69 t ha-1), while the lowest from M0 (4.22t ha-1). Due to the interaction effect of tillage depth and mulch materials, at 20 DAS, the maximum number of weed population m-2 (16.33) were found from T0M0, while the minimum number (4.33) from T3M2 treatment combination. At 30, 40, 50, 60 DAS and at harvest, the longest plants were observed from T3M2 (37.29, 60.46, 73.75, 96.60 and 111.50 cm, respectively) and the shortest plants from T0M0 (23.18, 35.38, 51.36, 70.19 and 89.40 cm, respectively). The highest grain yield were found from T3M2 (3.95 t ha-1) and the lowest from T0M0 (2.07 t ha-1). The highest straw yield were found from T3M2 (5.39 t ha-1) and the lowest from T0M0 (3.43 t ha-1). It were revealed that 9// depth of tillage with Black polythene mulch were found the best for weed management, yield attributes and yield of wheat.