INFLUENCE OF ORGANIC MANURE AND PHOSPHOROUS LEVEL ON THE PERFORMANCE OF SOYBEAN

Abstract

A field experiment was accomplished in the central farm of Sher-e-Bangla Agricultural University, Dhaka during the period from February, 2019 to May, 2019 to observe the influence of organic manure and phosphorous level on the performance of soybean. The experiment comprised of three levels of organic manure viz., i) O 0 = cowdung, O 2 = poultry litter, and five levels of P viz., P 0 ii

= control, P 1 = 25% less than recommended P, P 2 = recommended P, P 3 = control, O 1 =25% higher than recommended P and P 4 = 50% higher than recommended P were used in this experiment arranged in Split plot Design (SPD) with three replications. Data on different growth and yield attributes parameters were taken in which all the treatment showed significant variations. The result revealed that organic manure treatment O 2 (poultry litter) showed the highest grain yield (2.22 t ha -1 ) than the other organic manure treatment which may be attributed to the maximum plant height (69.93 cm), number of leaves plant -1 at all growth stages, number of branches plant -1 , dry weight plant -1 , pod length (3.72 cm) seeds pod (3.22), 100 seed weight (10.99 g), stover yield (3.47 t ha -1 ), biological yield (5.70 t ha ) and harvest index (38.16 %) in this treatment. Considering P level, although P 4 (50% higher than recommended P) gave the highest yield and yield attribute parameter but P 3 (25% higher than recommended P) dose also showed statistically similar and higher yield as well as higher plant characters, pod length (3.94 cm), seeds plant -1 (3.02), 100 seed weight (10.52 g), stover yield (2.33 tha -1 ) and harvest index (38.71 %). On the other hand, interaction of O 2 P 4 performed best by producing maximum yield than other parameters but O 2 P 3 (poultry litter with 25% higher than recommended P) treatment showed statistically similar performance with O 2 P 4 which may perhaps the maximum pod length (4.05 cm), seeds pod -1 (3.43), 100 seed weight (11.30 g), stover yield (3.92 t ha ) in this interaction treatments. Considering the sustainable yield and sound environment, poultry litter + 25% higher than recommended doses of P (O 2 -1 ) and biological yield (6.57 t ha P 3 -1 ) seem promising for soybean cultivation