Forest ecosystems represent a third of the total organic carbon (TOC) stored in the soil. However, studies still need to be carried out to generate reliable information on its soil carbon storage potential in an exper...Forest ecosystems represent a third of the total organic carbon (TOC) stored in the soil. However, studies still need to be carried out to generate reliable information on its soil carbon storage potential in an experimental plantation. Therefore, the objective of this research was to determine the storage of total organic carbon (TOC) in the soil in two experimental forest plantations with tropical species, located in the state of Nayarit, México. The research was carried out in two experimental plantations with tropical species, located at the Santiago Ixcuintla Experimental Field (CESIX) and at the El Verdine?o Experimental Site (SEEV). The established species are <i><i>Swietenia</i> <i>macrophylla</i></i> King (mahogany), <i><i>Cedrela</i> <i>odorata</i></i> L. (cedar) and <i><i>Tabebuia</i> <i>rosea</i></i> Bertoil (pink trumpet-tree). In addition, data from dasometric variables were used in order to define if any of these variables had a similar variation to the soil TOC stock by species. The sampling was done under a randomized block experimental design in each experimental forest plantation (CESIX and SEEV). Nine composite samples were collected in the soil under the tree species at a depth of 0 - 30 cm, and 1.5 m distance from the tree. To determine the soil TOC, an elemental analyzer with a thermal conductivity detector Thermo Scientific (Flash 2000) was used. The results showed that TOC presented mean values of 103.60 and 219.98 t·ha<sup>-1</sup> at a depth of 0 - 30 cm in CESIX and SEEV respectively. The highest TOC w<span><span><span style="font-family:;" "="">as</span></span></span><span><span><span style="font-family:;" "=""> obtained in soil under mahogany;142.95 t·ha<sup>-1</sup> in CESIX and 284.41 t·ha<sup>-1</sup> in SEEV. The analysis of the differences in TOC between the two plantations was highly significant. In the analysis of the species, it showed a statistically significant difference (<i><i>p</i></i> < 0.0001), defining that the soil under the mahogany, in general, presented the highest stock of TOC. Regarding the TOC in the soil plantation and the dasometric variables, none of the variables analyzed showed the same behavior in its variability.</span></span></span>展开更多
文摘Forest ecosystems represent a third of the total organic carbon (TOC) stored in the soil. However, studies still need to be carried out to generate reliable information on its soil carbon storage potential in an experimental plantation. Therefore, the objective of this research was to determine the storage of total organic carbon (TOC) in the soil in two experimental forest plantations with tropical species, located in the state of Nayarit, México. The research was carried out in two experimental plantations with tropical species, located at the Santiago Ixcuintla Experimental Field (CESIX) and at the El Verdine?o Experimental Site (SEEV). The established species are <i><i>Swietenia</i> <i>macrophylla</i></i> King (mahogany), <i><i>Cedrela</i> <i>odorata</i></i> L. (cedar) and <i><i>Tabebuia</i> <i>rosea</i></i> Bertoil (pink trumpet-tree). In addition, data from dasometric variables were used in order to define if any of these variables had a similar variation to the soil TOC stock by species. The sampling was done under a randomized block experimental design in each experimental forest plantation (CESIX and SEEV). Nine composite samples were collected in the soil under the tree species at a depth of 0 - 30 cm, and 1.5 m distance from the tree. To determine the soil TOC, an elemental analyzer with a thermal conductivity detector Thermo Scientific (Flash 2000) was used. The results showed that TOC presented mean values of 103.60 and 219.98 t·ha<sup>-1</sup> at a depth of 0 - 30 cm in CESIX and SEEV respectively. The highest TOC w<span><span><span style="font-family:;" "="">as</span></span></span><span><span><span style="font-family:;" "=""> obtained in soil under mahogany;142.95 t·ha<sup>-1</sup> in CESIX and 284.41 t·ha<sup>-1</sup> in SEEV. The analysis of the differences in TOC between the two plantations was highly significant. In the analysis of the species, it showed a statistically significant difference (<i><i>p</i></i> < 0.0001), defining that the soil under the mahogany, in general, presented the highest stock of TOC. Regarding the TOC in the soil plantation and the dasometric variables, none of the variables analyzed showed the same behavior in its variability.</span></span></span>
