EFFECT OF DIFFERENT LEVELS OF PHOSPHORUS ON THE GROWTH, NODULATION AND GRAIN YIELD OF INDIGO PLANT

Abstract

A field experiment was carried out with indigo plant from 28" March to 25" November 2005 in the Old Himalayan Piedmont Plain (AEZ-1) of Hajee Mohammad Danesh Science and Technology University, Dinajpur at soil science field laboratory to study the effect of different levels of phosphorus on the growth, nodulation and grain yield. The experiment was laid out in a Randomized Complete Block Design (RCBD). There were nine treatments with different fertilizer doses. Each of the treatments being replicated three times. Different doses of phosphorus had significant effect on nodulation, growth and yield of indigo. The highest shoot length, shoot dry weight, root dry weight, Total number of nodules plant, number of effective nodules, dry weight of nodule, weight of 1000 seed and grain yield were obtained from the dose of 50 kg P0; ha’' in treatment T;. The highest shoot length 63.60 cm, 140.20 cm and 241.5 cm, shoot dry weight 4.37 g, 14.74 g and 71.33 g, root dry weight 0.56 g, 1.37 g and 7.4 g were found at 45 DAS, 75 DAS and at harvest, respectively. The highest total nodules plant’ 12.8 and 24.6, effective nodules plant” 3.70 and 15.10 was obtained at 45 and 75 DAS, respectively. The dry weight of nodules 41.10 mg and 68.30 mg were found at 45 and 75 DAS. The highest yield contributing characters viz. 1000 seed weight and total grain yield were 5.50 g and 2484 kg ha", respectively for the treatment Ts. The findings of the present experiment indicates clearly that the treatment T; showed the better performance out of other treatments on growth, nodulation and all yield characteristics.