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Studies on root phenology, productivity and economics of wetland rice (Oryza sativa L.) as influenced by establishment methods and weed management practices

DOI: 10.18805/ijare.v0iOF.11181    | Article Id: A-4391 | Page : 358-361
Citation :- Studies on root phenology, productivity and economics of wetland rice(Oryza sativa L.) as influenced by establishment methodsand weed management practices .Indian Journal of Agricultural Research.2016.(50):358-361

M. Mokidul Islam* and Durga Charan Kalita1

mislam01d@yahoo.co.in
Address :

ICAR Research Complex for NEH Region, KVK Tura-794 005, Meghalaya, India.

Submitted Date : 13-02-2015
Accepted Date : 22-03-2016

Abstract

A field experiment was conducted at farmers’ field in West Garo Hills district of Meghalaya, India during kharif 2010 and 2011 to study the root characteristics of rice under different establishment methods and integrated weed management practices. Results revealed that the length, volume and biomass of roots were higher in SRI method followed by ICM method than CRC system at physiological maturity stage during both the years of investigation. Hand weeding twice at 20 and 40 DAT followed by butachlor 50 EC@1.5 kg a.i.ha-1 at 3 DAT + mechanical weeding at 20 DAT recorded higher root parameters over unweeded control during both years of field study. Maximum grain yield of rice was recorded with SRI method of establishment followed by ICM. Among the weed management practices, hand weeding twice at 20 DAT and 40 DAT recorded significantly higher grain yield closely followed by butachlor 50EC@1.5 kg a.i. ha-1 at 3 DAT + one mechanical weeding at 20 DAT. The higher net profit and B:C ratio  under SRI establishment method of wetland rice could be obtained with butachlor 50 EC@1.5 kg a.i. ha-1 at 3 DAT + mechanical weeding at 20 DAT followed by hand weeding twice at 20 and 40 DAT. In ICM higher grain yield was recorded with hand weeding twice at 20 and 40 DAT.

Keywords

CRC Grain yield ICM Rice Root phenology SRI Weed management.

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