Effect of bio-fertilizers and growth regulators on seed germination and seedling vigor in amla

Abstract

An experiment was conducted at Horticultural College and Research institute, Periyakulam during 1998-1999 to study the effect of bio-fertilizers, chemicals and growth regulators on the germination and seedling growth of anola. It was observed that Azospirillum + Phosphobacteria + 0.5% KNO, treatment with Azospirillum + Phosphobacteria + 200ppm of GA, treatment of old seeds were effective in causing initial germination. Fresh seed treated with Azospirillum + Phosphobacteria + 0.5% KNO, for 8 hours and one year old seeds treated with Azopirillum + Phosphobacteria + 200ppm of GA, for 8 hours recorded germination 952.08% and 49.17%) than the treatments. In fresh and one year old seeds, the same treatment was found to be induce higher shoot length (8.61cm, 7.97cm),root length (2.99cm and 2.69cm), dry matter production (262g/10 seedlings, 248g/10 seedlings), and vigour index (2.77.47, 278.40). in the case of time taken to reach buddable thickness, fresh seeds was treated with Azospirillum + Phosphobacteria + 0.5% KNO, for 8 hours taken lesser time taken to reach buddable thickness (111.83 days) and one year old seeds treated with Azospirillum + Phosphobacteria + 200ppm of GA, for 8 hours found to be lower days taken to reach buddable thickness of 113.27 days. Height of the plant at 90 days after sowing and 120 days after sowing for fresh seeds were found to be highest in Azospirillum + Phosphobacteria + 0.5% KNO, for 8 hours (14.89cm, 19.01) and one year old seeds, maximum height was found in Azospirillum+Phosphobacteria +200ppm of GA, for 8 hours (14.72cm and 18.52cm).