PJB-2023-591
EFFECT OF DIFFERENT NITROGEN FIXING BACTERIA AND PHOSPHORUS LEVELS ON YIELD AND YIELD COMPONENTS OF SOYBEAN
Rizwan Ali
Abstract
The current experiment was conducted at the Agronomy Research Farm, The University of Agriculture Peshawar using a split plot design with three replications during summer season, 2022. The first factor was nitrogen fixing bacteria (control, Bradyrhizobium, Azotobacter and Azospirillum) and the second factor was phosphorus levels (0, 20, 40 and 60 kg ha-1). The highest pod length (3.6 cm), number of seeds pod-1 (2.8) number of nodules plant-1 (42), number of main branches plant-1 (9), number of leaves plant-1 (92), thousand seeds weight (145 g), biological yield (10879 kg ha-1), seed yield (2701 kg ha-1) and harvest index (27.4%) were recorded in plots inoculated with Bradyrhizobium. Moreover, the highest values for pod length (3.7 cm) number of pods plant-1 (74) number of seeds pod-1 (2.8), number of nodules plant-1 (43), number of main branches plant-1 (9), number of leaves plant-1 (90), thousand seed weight (146 g), biological yield (11033 kg ha-1), seed yield (2935 kg ha-1) and harvest index (27%) were recorded in plots treated with 60 kg phosphorus ha-1. The interaction between different nitrogen fixing bacteria and phosphorus levels for thousand seeds weight, biological yield and seed yield were found significant when treated with Bradyrhizobium and 60 kg phosphorus ha-1. It is concluded that the application Bradhyrhizobium japonicum with phosphorus at the rate of 60 kg ha-1 increased yield and yield componens of soybean.
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