BHAGWAT SINGH CHOUHAN*, M. K. KAUSHIK, H. K. SUMERIYA, BAHADUR SINGH AND R. K. YADAV
Department of Agronomy, Maharana Pratap University of Agriculture & Technology, Udaipur-313 001 (Rajasthan), India
*(e-mail : bhagwatsinghchouhan8@gmail.com)
(Received : January 11, 2017; Accepted : March 15, 2017)
ABSTRACT
A field experiment was conducted at Udaipur during two consecutive rabi seasons of 2013-14 and 2014-15 to study the
effect of various irrigation schedulings, sowing methods and weed control on weed dynamics in wheat crop. The experiment consisted of IW/CPE ratios (0.8, 1.0 and 1.2), sowing methods (Line sowing, Crisscross sowing and FIRB) and weed control (weedy check, sulfosulfuron+metsulfuron (RM) and isoproturon+2, 4-D (TM) at 35 DAS) making 27 treatment combinations. These treatments were replicated thrice in split-plot design in which IW/CPE ratios were assigned to main plots and sowing method and chemical weed control in sub-plots. Results showed that IW/CPE ratio 0.8 recorded significantly lower weed population of dicot, monocot and total weeds at 30, 60, 90 DAS and at harvest as compared with 1.0 and 1.2 IW/CPE ratio. Among sowing methods, crisscross sowing and FIRB system of sowing methods recorded significantly lower weed population and its dry weight and NPK uptake by weeds over line sowing.With regards to weed control measures, isoproturon+2, 4-D (TM) and sulfosulfuron+metsulfuron (RM) recorded significantly lower weed population of dicot, monocot and total weeds and their dry matter accumulation at 30, 60, 90 DAS and at harvest and total NPK uptake by weeds over weedy check.
Key words :Weed dynamics, nutrient uptake, dry matter accumulation, sowing methods, wheat