摘要 : A field trial was carried out on red sandy loam soil during kharif 2009 at Zonal Agricultural Research Station, V. C. Farm, Mandya to investigate the effect of integrated weed management practices on nutrient uptake by weeds and a... 展开 A field trial was carried out on red sandy loam soil during kharif 2009 at Zonal Agricultural Research Station, V. C. Farm, Mandya to investigate the effect of integrated weed management practices on nutrient uptake by weeds and aerobic rice at harvest. The results revealed that application of bensulfuron methyl+pretilachlor (6.6 GR) @ 0.06+0.60 kg a. i./ha+one intercultivation at 40 DAS recorded significantly lower weed population and weed dry weight and higher grain yield. This was at par with bensulfuron methyl+pretilachlor (6.6 GR) @ 0.06+0.60 kg a. i./ha. The uptake of major nutrients by rice was higher in bensulfuron methyl+pretilachlor (6.6 GR) @ 0.06+0.60 kg a. i./ha+one intercultivation at 40 DAS and was at par with bensulfuron methyl+pretilachlor (6.6 GR) @ 0.06+0.60 kg a. i./ha. Higher nutrient uptake by weeds was recorded in unweeded check. There was a significant positive correlation between grain yield and total uptake of nitrogen, phosphorus and potassium by crop. 收起