Papers

EFFECT OF NITROGEN ON PRE-ANTHESIS RESEREVE TRANSLOCATION IN AROMATIC RICE (Pages : 20 - 26)

K. M. S. HAQUE, Q. A. KHALIQ and J. AKTAR

A field experiment was conducted to study the effect of nitrogen fertilizer on pre-anthesis reserve translocation in indigenous aromatic rice cultivars under stacking and non-stacking conditions during Aman season, 2002. There were four cultivars, namely, Shakkorkhora, Chinigura, Kalijira and Kataribhog, each with three levels of nitrogen fertilizer (0, 60 and 120 kg N ha-1 ). At the time of heading the experimental plots were equally divided into two parts. The crop in the half of the plot was left on the fate of the nature and that in the other half of the plot was mechanically supported by stacking to prevent lodging. The dry matter production of the plants varied significantly among the treatments. In all the cultivars, highest dry matter production was obtained from Kataribhog under stacking condition and in Shakkorkhora under non-stacking condition at 120 kg N ha-1 . Reduction in pre-anthesis dry matter of leaf blade, leaf sheath and culm was higher with the higher levels of N application. Reduction in dry matter after heading was higher under non-stacking condition than under stacking. Accumulation of dry matter at heading in leaf blade, leaf sheath and culm increased due to application of higher levels of nitrogen fertilizer. The reduction in pre-anthesis dry matter from plant components was higher under non-stacking condition. Download


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