Studies on Weed Diversity and its Associated Phytosociology under Direct Dry Seeded Rice Systems in Koria District (C.G.) India

Abstract

Chhattisgarh is commonly known as Bowl of rice where rice is grown as monocarp in the entire state whether soil is bhata, matasi, kanhar or black soil. Present study is based on the study of biodiversity of weeds under Direct Dry Seeded Rice Systems in Koria District (C.G.) Study was conducted to assess the phytosociological studies of weed species in paddy field at Baikunthpur, Koria district, Chhattisgarh. A total of 43 genera and 09 families of Dicotyledonae and 03 families of monocots & one Pteridophytes was also observed and 43 weed species were identified Ratio of Sedges: (Grasses: Broad-leaved weeds was calculated as 9:12:18 Ratio) under Direct Dry Seeded Rice Systems. The results obtained indicated that Echinochloa colona, Cyperus iria and Cynodon dactylon were the most frequent in 200; Echinochloa colon and Cyprus iria were the most frequent in 2008 and 2009. The importance value index (IVI) revealed that the most important weeds within the community were Poaceae and cyperaceous. Out of 12 angiospermic families the predominance was shown by monocot families Cyperaceae and Poaceae having and weeds species, respectively. The pteridophytic family Marsileaceae was represented by 01 weed species.