Vol. 6, Issue 6 (2018)
Effect of nitrogen levels and weed management practices on weed flora, yield and nutrient uptake by wheat grown in zero-till condition
Author(s): Manoj Kumar, Ram Pratap Singh, Vinay Kumar Pandey, Ajay Singh, Vipul Singh, Ankit Tiwari and Ramesh Singh Yadav
Abstract: A field experiment was conducted during Rabi season of 2015-16 and 2016-17 to evaluate effect of nitrogen levels and weed management practices on weed flora, yield and yield attribute and nitrogen uptake by wheat under zero-till. The field trial was laid out in RBD with three replication, having the treatments comprised of four levels of nitrogen viz. 90, 120, 150 and 180 kg N ha-1, and five weed management practices viz. weedy check, two hand weeding (30&60 DAS), clodinafop + metsulfuron (60+4 g a.i. ha-1), fenoxaprop + metsulfuron at (120+4 g ha-1) and sulfosulfuron + metsulfuron (25+4 g ha-1) applied as post emegence. The five weed species were common infested wheat i.e. Phalaris minor and Cynodon dactylon among grasses and Anagallis arvensis, Medicago denticulata and Convolvulus arvensis (broad leaved), and Cyperus rotundus (sedges). Application of N reduced the weed density, however increased dry matter accumulation. The nitrogen uptake was increase with increasing levels of nitrogen however recorded maximum N – uptake at 180 kg N / ha. Twice hand weeding recorded lowest density and dry weight of weed, which being at par with clodinafop and metsulfuron (60+4 g a.i. ha-1). Maximum nitrogen uptake by crop was recorded with Twice hand weeding followed by clodinafop and metsulfuron. Application nitrogen @ 180 kg/ha produced significantly higher grain and straw yield (38.21 and 39.78 q ha-1) and (51.39 and 52.33q ha-1), in respective years over rest of N – levels but Hand weeding twice gave significantly higher grain and straw yield over rest of herbicidal treatment being at par with clodinafop and metsulfuron.
Pages: 2084-2087 | 362 Views 61 Downloads
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How to cite this article:
Manoj Kumar, Ram Pratap Singh, Vinay Kumar Pandey, Ajay Singh, Vipul Singh, Ankit Tiwari, Ramesh Singh Yadav. Effect of nitrogen levels and weed management practices on weed flora, yield and nutrient uptake by wheat grown in zero-till condition. Int J Chem Stud 2018;6(6):2084-2087.
