TY - JOUR AU - Islam, MR AU - Saha, PK AU - Zaman, SK AU - Uddin, MJ PY - 2011/11/20 Y2 - 2024/03/28 TI - Phosphorus fertilization in inbred and hybrid rice JF - Dhaka University Journal of Biological Sciences JA - Dhaka Univ. J. Biol. Sci VL - 19 IS - 2 SE - Articles DO - 10.3329/dujbs.v19i2.8962 UR - https://www.banglajol.info/index.php/DUJBS/article/view/8962 SP - 181-187 AB - <p>Five phosphorus rates (0, 5, 10, 20 and 30 kg P/ha) were tested with four rice genotypes in Boro (BRRI dhan36, BRRI dhan45, EH<sub>1</sub> and EH<sub>2</sub>) and T. Aman (BRRI dhan30, BRRI dhan49, EH<sub>1</sub> and EH<sub>2</sub>) season. Phosphorus rates did not influence grain yield irrespective of varieties in T. Aman season while in Boro season P response was observed among the P rates. Application of P @ 10 kg/ha significantly increased the grain yield. But when P was applied @ 20 and 30 kg P/ha, the grain yield difference was not significant. The optimum and economic rate of P for T. Aman was 20 kg P/ha but in Boro rice the optimum and economic doses of P were 22 and 30 kg/ha, respectively. Hybrid entries (EH<sub>1</sub> and EH<sub>2</sub>) used P more efficiently than inbred varieties. A negative P balance was observed up to 10 kg P/ha.</p> <p><strong>Key words:</strong> Response; Phosphorus fertilizer; Inbred; Hybrid rice</p> <p>DOI: <a href="http://dx.doi.org/10.3329/dujbs.v19i2.8962">http://dx.doi.org/10.3329/dujbs.v19i2.8962</a></p> <p><em>DUJBS </em>2010; 19(2): 181-187</p> ER -