Effect of Nitrogen Fixing Bacteria in Combination with Organic Manures and Inorganic Fertilizers on Yield and Quality of Coleus

摘要

The influence of nitrogen fixing bacteria in combination with organic manures and inorganic fertilizers on yield and quality of coleus (Coleus forskohlii Briq.) was studied under field conditions during kharif'season of 2006 and 2007 at Arabhavi located under Western dry zone of Karnataka. The results indicated that significantly higher number of tuberous roots per plant (16.43), length of tuberous roots (11.70 cm), girth of tuberous roots (1.71 cm), fresh and dry weight of tuberous roots per plant (211.17 and 35.00 g, respectively) and per hectare (8.51 and 1.41 t, respectively) were recorded in the treatment. Recommended dose (RD) of FYM + RD NPK + neem cake +Azotobacter + Azospirillum (T -(16)). Among the different treatments tested, this treatment also recorded significantly higher forskolin content (0.62%) in its tuberous roots and forskolin yield per ha (6.60 kg).