INFLUENCE OF BIOFERTILIZER AND PHOSPHORUS LEVEL ON GROWTH, NODULATION AND YIELD OF SOYBEAN

Abstract

A field experiment was conducted at the research farm of Sher-e-Bangla Agricultural University, Dhaka, during January to April, 2018 to study the influence of biofertilizer and phosphorus level on growth, nodulation and yield of soybean. The experiment consists of two factors- factor A: Biofertilizer level-2; i) Control (without biofertilzer) (B 0 ii ) and ii) Biofertilizer (B 1 ); factor B: P levels-5; i) Control (no phosphorus) (P 0 ), ii) 25% less TSP than recommended dose (P 1 ), iii) Recommended dose of TSP (P 2 ), iv) 25% higher TSP than recommended dose (P 3 ) and 50% higher TSP than recommended dose (P 4 ). Biofertilizer was used @ 25 g kg -1 seed. The experiment was laid out in split plot design with three replications. Growth, yield attributes and yield data like plant height, number of branches plant -1 , dry weight plant , number of nodules plant -1 , pod length, number of pods plant -1 , 100 seed weight, shelling percentage, seed yield and stover yield were collected from this experiment. Data were statistically analyzed using MSTAT-C software program. The significance of difference among the treatments means was estimated by the Duncan’s Multiple Range Test (DMRT)at 5% level of probability. The result revealed that biofertilizer applied treatment (B 1 ) was found best by producing higher yield as well as highest 100 seed weight, number of seeds pod , pod length, nodules plant -1 , and other growth characters. On the other hand, P levels at 25% higher phosphorus than recommended dose (P 3 ) produced highest yield (3613.00 kg ha -1 ), plant height, branches plant -1 , dry weight plant , nodules plant -1 , pods plant -1 , 100 seed weight, stover yield and biological yield. In case of interaction, B 1 P 3 was found superior by producing highest seed yield (3714.00kg ha -1 ) and yield attributes like pods plant -1 -1 -1 -1 (55.40), seeds pod

(2.98). From the result of study, it was revealed that application of biofertilzer and 25% higher TSP than recommended dose had positive impact on soybean (BINA Soybean-1). -1