Optimization of lowland productivity through fertilization as a food buffer against the impact of climate change

¹ Research Center for Food Crops, Research Organization for Agriculture and Food, National Research and Innovation Agency, Jl. Raya Bogor-Jakarta, Cibinong, Bogor 16911, West Java, Indonesia
² Institute of Agriculture (Intan) Yogyakarta – Magelang Street Km. 5.6 P.O Box 1059 Yogyakarta Special Region, Indonesia

^* Corresponding author: nps_ratmini@yahoo.com

Abstract

Lowland is an agroecosystem that can be cultivated for agricultural production activities. Its wide potential and planting time are generally carried out in the dry season resulting in lowland areas being the main national food buffer during El-Nino. Its management, which is not optimal results in low production. Increased productivity of lowland land can be done by applying the optimum fertilizer. This study aims to determine the effect of NPK fertilizer on the growth and productivity of rice in lowland fields in South Sumatra. The study used a completely randomized block design with four treatments and six replications. The indicator plant uses rice variety Inpari 42. The results showed that the highest production was obtained in the combined treatment of 250 kg NPK ha^-1 + 150 kg urea ha^-1 + 1,000 kg dolomite ha^-1 with a yield of 5.81 t ha^-1. These results indicate that NPK and urea fertilization combined with dolomite can increase the productivity of lowland rice fields as a buffer zone for rice production against the impacts of climate change.