Phytosociological Studies of Rice Weeds in DS1R and TSR field of Bilaspur District (C.G.)
1Raghunandan Prasad Sharma and 2Madhu Yamini Soni
1Department of Botany Govt. Agrasen College Bilha, Bilaspur-495224 (India) 2Department of Botany, Atal Bihari Vajpayee Vishwavidyalaya Bilaspur-495001 (India)
ABSTRACT
An overview study of weeds in Dry Seeded Rice (DSR) field and Transplanted Seeded Rice (TSR) field are done in two study sites of Bilaspur district Chhattisgarh such as Ganiyari and Masturi. Their phytosociological characters such as % frequency, density, abundance, IVI, etc. are calculated in the method given by Mishra et.al.1968. General survey was done in the pick period of weed growth on session July to November 2021. Survey indicate more than 42 weed species are associated with rice crop. Those sites soil type and climatic conditions are favorable for weed growth and paddy crop production. Studies of those characters are very much important for weed control and weed free rice production. Observation clearly indicate that Cyperus iria, Echinochloa colona and Cyperus flavidus have been found to be most frequently distributed weeds in those study sites. Density wise also these two species are found the most populated species. The same picture is seen with abundance also. However, on the basis of relative values of frequency, density and abundance in those sites following trends has been observed. Cyperus iria > Echinochola colona > Cyperus flavidus.