Physiological and Yield Responses of Five Rice Varieties to Nitrogen Fertilizer Under Farmer’s Field in Iada Ketara, Terengganu, Malaysia

Studies have suggested that the need for site-specific fertilizer application to reduce waste of resources as soil nutrients varies across Malaysian rice fields. The present study was aiming determine physiological and yield responses five varieties (MR269, MR297, MR220CL2, MR219, UPUTRA) treated with three nitrogen (N) rates under farmer’s field condition. experiment design a split-plot randomized complete block design, in which N rates, i.e. low (76 kg ha-1), farmers’ practice (109 ha-1) high (142 were main plot while sub-plot. In general, harvestable panicle including grain (at 14% moisture content) all between 5.4 7.4 t ha-1 treatments. Among varieties, MR220CL2 recorded significantly higher yield, irrespective treatments, however, mostly non-significant except biomass. Specifically, each variety different biomass partitioning percentages organs at growth phases. case there no significant difference 30% compared harvest. Hence, it could be farmers may about without reduction this specific plot. However, potential uptake might also affected by unaccounted factors such availability micronutrients planting density.