Fertilization and Amelioration Method to Increase Rice Productivity in Tidal Swamp Land Type C on The Border of West Kalimantan-Malaysia

Abstract

Tidal swamp land is an important resource in providing rice in the border area of Sambas Regency, West Kalimantan-Malaysia. However, rice production capacity in tidal swamp land is still low. Applying appropriate and balanced fertilizers tailored to the unique nutrient requirements and salinity levels of tidal swamp soil can support optimal paddy growth and productivity. Therefore, this study was conducted to determine the combination of fertilization and amelioration application on the growth and productivity of rice in tidal swamp land with a type C overflow. The study tested the treatment of amelioration (without lime/A ₀; CaCO ₃/A ₁; and (Ca, Mg)(CO ₃) ₂)/A ₂) and fertilization dose (based on farmer and recommendation) in Tebas Sungai Village, Tebas District, Sambas Regency, West Kalimantan. The treatment was arranged in a split-plot design consisted of amelioration methods as main plot while fertilization dose as suplot. The results showed that plant growth, yield components, and productivity were influenced by lime source and fertilizer dose. The highest productivity (5.62 tons ha ^-1) was obtained from the plot treated with CaCO ₃ and fertilized according to the recommendation.