TY - JOUR AU - Sosa-Rodrigues, Breno Augusto AU - García-Vivas, Yuly Samantha PY - 2019/09/01 Y2 - 2024/03/28 TI - Emission of greenhouse gases in the soil under the green manure effect JF - Agronomía Mesoamericana JA - Agron. Mesoam. VL - 30 IS - 3 SE - Articles DO - 10.15517/am.v30i3.36103 UR - https://revistas.ucr.ac.cr/index.php/agromeso/article/view/36103 SP - 767-782 AB - <p><span class="CharOverride-4">Introduction. </span>Soil management practices in agroecosystems, such as the use of green manures (GM), positively affect greenhouse gas (GHG) emissions.<span class="CharOverride-4"><strong> Objective.</strong> </span>The objective of the research was to evaluate CO<span class="CharOverride-5">2</span>,CH<span class="CharOverride-5">4</span>, and N<span class="CharOverride-5">2</span>O emission of a soil cultivated with corn and soybean under the use of green fertilizers, fallow (B), and nitrogen fertilization. <span class="CharOverride-4"><strong>Materials and methods.</strong> </span>Between July 2011 and June 2012, in a Typic Haplustert located in Valle del Cauca, Colombia, corn and soybeans were planted in a intervleaved manner, and the monocultures of corn and soybeans were managed in a conventional manner. The association between<span class="CharOverride-6"> Mucuna pruriens</span> var. <span class="CharOverride-6">utilis</span> and maize was established as GM, ninety days after sowing, the total residues were incorporated as GM or disposed on the soil surface as organic mulch (AO). Eleven treatments were used under the design of randomized complete blocks, with 3<span class="CharOverride-2">2</span> + 2 factorial arrangement, with three repetitions. The main plots were GM, AO and B. Each was divided into sub-plots corresponding to compost fertilization, industrial chemical synthesis fertilizer and no additions. In the flowering and grain filling stage of the crops, variables such as N<span class="CharOverride-5">2</span>O, CH<span class="CharOverride-5">4</span>, CO<span class="CharOverride-5">2</span> and total water-filled porosity were analyzed. <span class="CharOverride-4"><strong>Results</strong>. </span>CO<span class="CharOverride-5">2</span> flow was higher in the intercrops added with GM/AO compared to monocultures. In the main plots, the use of industrial chemical synthesis fertilizers significantly stimulated N<span class="CharOverride-5">2</span>O and CH<span class="CharOverride-5">4</span> fluxes. <span class="CharOverride-4"><strong>Conclusion.</strong> </span>The use of high quality organic materials such as GM/AO did not ensure GHG sink soils in the short-term, since soil conditions and nitrogen fertilization significantly influenced emissions.</p> ER -