Pengaruh Pengairan Terhadap Hasil Emisi Gas Nitro-Oksida (N2O) pada Padi Sawah

Abstract

The aim of the study is the effect of nitrous oxide (N2O) emissions on rice field. The study was conducted at the Experimental Garden of the Faculty of Agriculture, Sriwijaya University, Indralaya Campus. The N2O gas analysis was conducted at the Laboratory of the Indonesian Agricultural Environment Research Institute, Ministry of Agriculture, Central Java. From April to July 2016. This study used a Randomized Block Design (RBD) with irrigation classes, namely 5 cm (A1), intermittent / intermittent (A2) plots, and saturated land (A3), divided into three (3) groups with a total of 18 treatments, so that there were 54 plots in total. Observation of N2O gas was chosen at weeks 2, 4, 6 and 8 after planting using a closed lid for 24 hours. N2O gas flux is calculated based on an equation adopted from the International Atomic Energy Agency (IAEA). The results obtained are the emission of N2O gas produced by maps with air saturation condition of 5 cm from the surface of the land (A3) in the amount of 1564,554 mg N2O / ha / day and the lowest is produced by inundated plots (A1) with a value of 648,996 mg N2O / ha / day. Soil conditions that are inundated during plant growth produce anaerobic soil conditions capable of lifting N2O flux compared to air-saturated conditions.