Greenhouse Gas Emissions from Double-Season Rice Field under Different Tillage Practices and Fertilization Managements in Southeast China

To better understand the effects of tillage practice and fertilization management on greenhouse gas emissions yields, a four-year field experiment was conducted to assess practices (rotary (RT) no (NT)) methane (CH4) nitrous oxide (N2O) rice yield under four strategies (no fertilizer without straw (CK), inorganic (F), fertilize with biochar (FB), (FS)). The results showed that NT significantly reduced CH4 by 21.1% 52.6% compared RT in early late rice, respectively. Conversely, led significant increase N2O 101.0%, 79.0%, 220.8% during fallow periods. Nevertheless, global warming potential (GWP) intensity (GHGI) were mitigated, respectively, 36.4% 35.9% NT, treatment. There interactions between management. Compared CK, F FB treatments GWP, 40.4% 53.8%, as well GHGI, 58.2% 69.9% condition; however, difference found condition. In contrast, FS treatment increased GWP GHGI both conditions. Overall, had same low rating, value 0.44 kg CO2-eq kg−1 year−1 NT. Thus, conversion its application fields is potentially sustainable agricultural strategy for mitigating GHG increasing yields. This study provides theoretical practical support double-season production climate-smart agriculture.