Rice productivity on the swampland flooded tide: The case of Terusan Karya Village

Sustainability of agricultural development in swampland is required considering its fragile nature. The objective of research is to study the impact of tides on rice productivity in the flooded tidal swampland type B of Terusan Karya Village in July-October 2021. This research was a demonstration plots on the Rei 27 with an area of 14 ha that applied water management systems, soil tillage, application of ameliorant and fertilizer, use of improved rice and integrated pest management. The result showed lower water acidity with increasing distance from the Rei estuary, pH 3.16 to pH 4.71 at 2.3 km. Electrical conductivity (EC) and total dissolved solids (TDS) increased with increasing distance, from 0.54 to 0.89 mmhos cm-1 and 272 to 446 ppm. The further away from the estuary the more acidic the soil, from pH 5.49 to pH 4.63. Other soil chemical properties such as Al, Fe, Mg, K, and CEC showed an irregular pattern. Rice yield showed a range of 4.3 – 5.2 t ha-1 in the estuary of Rei (0 km), increased (5.7 – 6.3 t ha-1) in the middle (1.0-1.5 km), then decreased (4.2-4.5 t ha-1) at the end (2.3-2.5 km). Soil pH and Fe concentration significantly impact to rice productivity.*