Effect of organic manures and bio-stimulant on physiological and biochemical characters of ginger (Zingiber officinale Rosc.)

A field experiment was conducted to study the effect of organic manures and bio-stimulants on physiological and biochemical characters of ginger. The experiment was laid out in a Randomized Block Design (RBD) with ten treatments and replicated three times. The results clearly indicate that theapplication of 75% N (FYM) + 25% N (Vermicompost) + 3% Panchakavya significantly increased chlorophyll content (44.52) followed by the application of 50% N (FYM) +25% N (Neem cake) + 25% N (Vermicompost) + Azospirillum (5kg/ha) + PPFM (1%) (43.20). The plants fed with 50% N (FYM) +25% N (Neem cake) + 25% N (Vermicompost) + Azospirillum (5kg/ha) + 3% Panchakavya) at 150 DAP recorded the highest leaf area (2378.72 cm²), leaf area index (2.64) and dry matter accumulation (65.42 g/plant). It was found that different treatments of organic manures and bio-stimulants had significant effect on Crop Growth Rate (CGR), Relative Growth Rate (RGR) and Net Assimilation Rate (NAR) during the period of crop growth. The application of 50% N (FYM) +25% N (Neem cake) + 25% N (Vermicompost) + Azospirillum (5kg/ha) + Panchakavya (3%)recorded the highest essential oil content of 2.25%. The oleoresin content (9.86%) was highest in the application of 75% N (FYM) + 25% N (Vermicompost) + 3% Panchakavya. Among the various treatments, the plant supplied with 50% N (FYM) +25% N (Neem cake) + 25% N (Vermicompost) + Azospirillum (5kg/ha) + 0.1% Humic acid recorded the maximum crude fibre content (5.64%).