Chemical Weed Management in SRI and Transplanted Rice under Temperate Condition
Weed Management in SRI and Transplanted Rice
Keywords:
Chemical weed control, system of rice intensification (SRI), weed density, weed dry matter, weed control efficiencyAbstract
A field experiment was conducted at Research Form of Faculty of Agriculture, SKUAST-Kashmir, Wadura, in a two-factor randomized block design with three replications during kharif 2017 and 2018, to evaluate weed management in rice under SRI and normal Transplanting conditions. Application of butachlor @ 1.5 kg ai/ha as pre emergence fb oxadiargyl @ 100 g ai / ha as post emergence fallowed by application of bensulfuron methyl 0.6 % + pretilachlor 6 % GR (Erage) @ 10 kg/ha as pre-emergence recorded significantly greater grain, straw and biological yield than all other weed management practices and weedy check. Grain yield increased by about 29% with application of Butachlor 1.5 kg a.i.ha-1 as pre-emergence fb Oxadiargyl 100 g a.i.ha-1 as post-emergence over butachlor application alone. Both the planting methods were counted the statistically similar number of weeds / m2 and recorded higher weed biomass and weed control efficiency at all the growth stages during both the years. The data reviled that significant increase in grain yield, number of panicles/m2 and grains/panicle in the system of rice intensification (SRI) over normal transplanting method, however straw yield, biological yield and test weight did not differ significantly during both the years.
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