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48
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2
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2016
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217
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219
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Short communications
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Bispyribac-sodium influence on nutrient uptake by weeds and transplanted rice
R. Prashanth, K.N. Kalyana Murthy, V. Madhu Kumar, M. Murali and C.M. Sunil
DOI :
http://dx.doi.org/10.5958/0974-8164.2016.00053.8
Email :
sunilcmuasb@gmail.com
Address :
Department of Agronomy, University of Agricultural Sciences, Bengaluru, Karnataka 560 065
Keywords
Bispyribac-sodium, Economics, Nutrient uptake, Transplanted rice
Abstract
Application of bispyribac-sodium 25 g/ha at 15 DAT recorded significantly lower total weed population and higher grain (6.47 t/ha) and straw yield (7.66 t/ha) as compared to pretilachlort 750 g/ha at 5 DAT. The nutrient uptake by weeds for N,P and K was significantly higher with unweeded check (12.32, 2.78 and 20.28 kg/ha, respectively). Whereas the lowest uptake was noticed with bispyribac-sodium 35 g/ha at 15 DAT (1.02, 0.21 and 1.62 kg/ha, respectively). The nutrient uptake by rice for N, P, and K was significantly higher with bispyribac-sodium 25 g/ha at 15 DAT (122.66, 15.74 and 164.51 kg/ha, respectively) as compared to unweeded check (78.24, 9.99 and 105.58 kg/ha, respectively). Similar trend was observed with net returns and B:C ratio.