Sowing Performance of Spatially Modified No-Till Drill in Paddy Field Harvested by Combine Having a Straw Managing System

摘要

The major problem in sowing wheat crop under no tillage in combine harvested paddy fields is the frequent choking of no-till drill machine due to long loose straw, lying in the windows. Effective residue management requires bom straw and chaff to be finely chopped and evenly spread over the entire cutting width of combine. Sowing performance of spatially modified no-till drill after harvesting paddy crop with straw managing system (SMS) attached combine harvester was studied. SMS was operated with three rows of stationary blades, rotor speed index of 40 and deflector angle 20 degree . In spatially modified no-till drill, having 3-member frame, 600 mm vertical clearance and 600 mm tine to tine spacing, there was no straw accumulation when operated in SMS harvested field. Sowing performance of spatially modified NTD was same as the performance of conventional NTD operated in clean field on the basis of furrow geometry and seed placement. Residue as mulch reduced the initial germination of the wheat seedlings but afterwards the overall germination count was not affected by the mulch. The difference in plant height, effective tiller count, ear length and number of grains per ear head was found to be non-significant for both treatments at 5% level of significance. Thousand gram mass and grain yield were found to be significantly higher for spatially modified NTD operated in SMS attached combine harvested field than conventional NTD sown field.