Effect of fertiliser and weed management of direct seeded rice (Oryza sativa) on nutrient utilization
1999
Choubey, N.K. | Tripathi, R.S. | Ghosh, B.C.(Indian Institute of Technology, West Bangal(India))
A field experiment was carried out during rainy seasons of 1993 and 1994 on sandy loam soil at IIT, Kharagpur to study the effect of fertilizer and weed management on nutrient uptake by direct seeded rice and associated weeds. Application of 60 kg N, 30 kg P2O5 and 30 kg K2O + 6 t FYM/ha recorded significantly higher N, P and K uptake by rice as compared to others; whereas, the highest nutrient removal by weeds was noted under 60 kg N, 30 kg P2O5 and 30 kg K2O/ha. Hand weeding and chemical weeding treatments significantly decreased the nutrient removal through weeds as well as increased the uptake by crop and gave higher grain (1.51 and 1.07 t/ha) and straw (2.39 and 1.97 t/ha) yields. However, minimum nutrient uptake by crop and maximum N, P and K removel by weeds was noted under unweeded check.
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