Vol. 8, Issue 4 (2020)
Impact of weed management and row spacing on growth attributes of aerobic rice, weed density, dry matter and nutrient uptake
Author(s): Vasundhara Kaushik, SP Singh and Sirazuddin
Abstract: A field experiment was conducted during Kharif season of 2017 in D2 block at Norman E. Borlaug Crop Research Centre of G. B. Pant University of Agriculture and Technology, Pantnagar to find out the impact of weed management practices and row spacing on the growth attributes of direct seeded rice, dry matter accumulation of weeds and nutrient uptake by them. Row spacing recorded the non-significant difference in plant height at all growth stages. Pendimethalin 1kg /ha fb penoxsulam 22.5 g/ha recorded the highest plant height which was at par with the weed free and with cyhalofop-butyl + penoxsulam (Readymix) 150g/ha at 80 DAS and at maturity. Row spacing of (25 cm) recorded highest number of shoots which was at par with (20) row spacing and significantly higher than the (30 cm) row spacing at 60, 80 DAS and at maturity. Pendimethalin 1kg/ha fb Penoxsulam 22.5 g/ha recorded significantly maximum number of shoots per square metre over all the other treatments at all crop growth stages. The highest total dry matter accumulation of weeds at 60 DAS was under the spacing of 30cm which was at par with the other two row spacings. The highest uptake of nitrogen (26.12 kg/ha), phosphorous (5.47 kg/ha) and potassium (52.82 kg/ha) by weeds was recorded in weedy check. Treatment pendimethalin @1kg a.i/ha fb penoxsulam @ 22.5 g/ha recorded lowest uptake of nutrients (N, P and K).
DOI: 10.22271/chemi.2020.v8.i4ae.10039
Pages: 2642-2646 | 356 Views 66 Downloads
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How to cite this article:
Vasundhara Kaushik, SP Singh, Sirazuddin. Impact of weed management and row spacing on growth attributes of aerobic rice, weed density, dry matter and nutrient uptake. Int J Chem Stud 2020;8(4):2642-2646. DOI: 10.22271/chemi.2020.v8.i4ae.10039
