Strategy of nitrogen fertilizer application to increase growth and yield of rice in ratoon system at tidal swampland

Abstract

This study aims to determine the effect of regulating the provision of nitrogen fertilizer on several rice varieties on the growth and yield of rice in ratoon system at the Tidal swampland. A split plot design was employed in this experiment. The main plot was nitrogen fertilizer application (N) consisting of N1, N2, N3, and N4. The subplot is rice varieties (V) consisting of Inpari 30 (V1), Inpara 3 (V2), Inpari 33 (V3), Inpari 43 (V4) and Hipa 5 Ceva (V5). The results showed that ½ dose nitrogen fertilization given at planting + ½ dose at primordia had a good effect on the growth and yield of the main crop, whereas 1/3 dose nitrogen fertilization given at planting + 1/3 dose at primordia + 1/3 dose at harvest tends to have a good effect on ratoon yield. Variety Hipa 5 Ceva produced highest yield of unhusked rice (i.e. 4.9 tons ha-1 for the main crop and 2.71 tons ha-1 for ratoon) at (N3): 135 kg N ha-1 fertilizer, when ½ dose was given at planting + ½ dose at primordia. The variety Hipa 5 Ceva with various nitrogen fertilization strategies provided the highest total grain yield in the ratoon system at tidal swampland.

Productivity of Two Rice Varieties Using Ratoon System Through N Fertilizing Treatments at Two Flooding Types on Tidal Lowland Area

“…Seeds used in this study are rice hybrid variety (Hipa 5 Ceva) and inbred variety (Inpari 30) in which both are potential to be developed and widely planted by famers at tidal lowland area. Seeds are previously incubated at room temperature in dark condition for 3 days [12] and after germinating they are sown on nursery beds having size of 2 m x 10 m.…”

“…According to [10,11], nitrogen fertilizing gives significant effect on the increase of rice crop production. The study result from [12] showed that nitrogen fertilizing with 1/3 dose given during planting time + 1/3 dose during primordial period + 1/3 dose given at harvest time tend to have good effect on ratoon rice yield.…”

“…rice crop clump that had already been harvested and regrow to produce new tillers [7]. The study result from [12] showed that rice hybrid variety of Hipa 5 Ceva with ratoon system gave the highest rice yield with magnitude of 6.9 ton/ha. This study objective was to determine productivity of two rice varieties with ratoon system through through N fertilizing treatments at two flooding types on tidal lowland area.…”

Reasonable Nitrogen Regime in the Main Crop Increased Grain Yields in Both Main and Ratoon Rice

“…N fertilizer management of ratoon rice mainly involves the application of N fertilizer to the main crop and the ratoon crop (bud fertilizer and seedling fertilizer). Many scholars have researched the effects of N fertilizer management in ratoon season on the growth and development of ratoon crops, and most agree that the application of bud and seedling fertilizers can promote the growth of regenerated buds and improve the regenerative capacity and yield of ratoon crops [15,16]. However, there are relatively few studies about the effects of N fertilizer management in the main crop on the growth and development of ratoon crops, and the results have been inconsistent or even contradictory.…”