A R M Solaiman
Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh
Title: Growth, yield and Nutrient uptake by rice as influenced by Diazotrophic Bacteria
Biography
Biography: A R M Solaiman
Abstract
Diazotrophic bacteria are thought to replace part of N fertilizer required by rice plant. To this context an initial experiment was conducted in pot to assess the influence of fifteen diazotrophic Rhizobium isolates viz. BU Ls 2, BU Ls 6, BU Ls 13, BU Ls 14, BU Ls 15, BU Ls 16, BU Ls 17, BU Ls 18, BU Ca 6, BU Ca 7, BU Ca 8, BU Le 9, BU Le 10, BU Ps 1 and BU Ps 2 on growth, yield and nutrient uptake. Among the isolates BU Ls 6 performed best in recording plant height, root length and volume, biomass and grain yields and nutrient uptake both at vegetative and harvesting stages of rice. BU Ls 2 also performed more or less similarly as that of BU Ls 6. A follow up experiment was conducted in field to assess the influence of the isolates in presence and absence of N and P supplied from fertilizers. BU Ls 6 in combination with recommended doses of 50%N +100%P significantly increased all plant parameters including biomass (5.24 t ha-1) and grain (4.916 t ha-1) yields and nutrient uptake. Among the isolates BU Ls 6 was the best diazotrophic bacteria.