Analisis Global Warming Potential pada FONi dengan Variasi Tinggi Muka Air dan Pupuk pada Budidaya Padi.

Abstract

Budidaya padi merupakan salah satu sumber emisi gas rumah kaca (GRK) yang dipengaruhi oleh pengelolaan air dan pemupukan. Penelitian ini bertujuan menganalisis pengaruh rezim irigasi dan jenis pupuk terhadap nilai Global Warming Potential (GWP), produktivitas tanaman padi, serta karakteristik neraca air pada sistem Fertigator Otomatis Nirdaya (FONi). Penelitian dilaksanakan di Kinjiro Farm, Kota Bogor pada 19 Februari - 4 Juni 2026, menggunakan varietas padi Sintanur dengan empat rezim irigasi, yaitu rezim tergenang (RT), rezim basah (RB), rezim kering (RK), dan rezim berselang (RBe), dengan penggunaan pupuk organik dan anorganik. Data dianalisis menggunakan analisis ANOVA Two-way dan uji lanjut Tukey HSD. Hasil penelitian menunjukkan bahwa faktor pupuk berpengaruh terhadap GWP pada taraf 10% (p<0,10), sedangkan rezim irigasi dan interaksinya tidak berpengaruh nyata. Produktivitas tertinggi diperoleh pada RB dengan pupuk anorganik sebesar 5,8 ton/ha. Nilai GWP terendah diperoleh pada RBe dengan pupuk anorganik sebesar 8.332 kg CO2-eq/ha, atau lebih rendah sekitar 44% dibandingkan RT dengan pupuk organik yang menghasilkan GWP tertinggi sebesar 14.775 kg CO2-eq/ha.

Rice cultivation contributes to greenhouse gas (GHG) emissions, which are affected by irrigation and fertilizer management practices. This study evaluated the effects of irrigation regimes and fertilizer types on Global Warming Potential (GWP), rice productivity, and water balance characteristics within the Fertigator Otomatis Nirdaya (FONi) system. The experiment was conducted at Kinjiro Farm, Bogor City, from February 19 to June 4, 2026, using the Sintanur rice variety under four irrigation regimes flooded (RT), wet (RB), dry (RK), and alternate wetting and drying (RBe) combined with organic and inorganic fertilizers. Data were analyzed using Two-Way ANOVA followed by Tukey’s HSD test. The results showed that fertilizer type significantly affected GWP at the 10% significance level (p < 0.10), whereas irrigation regime and its interaction with fertilizer type had no significant effect. The highest rice productivity was obtained under the RB regime with inorganic fertilizer (5.8 t/ha), which also produced the lowest GWP of 8,332 kg CO2-eq/ha, approximately 44% lower than the flooded regime with organic fertilizer that generated the highest GWP of 14,775 kg CO2-eq/ha.