Carbon stocks in compartments of soil organic matter 31 years after substitution of native Cerrado vegetation by agroecosystems
Gorde:
| Egile nagusia: | |
|---|---|
| Argitaratze data: | 2016 |
| Beste egile batzuk: | , , , , |
| Formatua: | Article |
| Hizkuntza: | eng |
| Baliabidea: | Repositório Institucional da UnB |
| Download full: | http://repositorio.unb.br/handle/10482/30045 http://dx.doi.org/10.1590/18069657rbcs20150059 |
Gaia: | Changes in carbon stocks in different compartments of soil organic matter of a clayey Latossolo Vermelho Distrófico (Typic Haplustox), caused by the substitution of native savanna vegetation (cerrado sensu stricto) by agroecosystems, were assessed after 31 years of cultivation. Under native vegetation, a stock of 164.5 Mg ha-1 C was estimated in the 0.00-1.00 m layer. After 31 years of cultivation, these changes in soil C stocks were detected to a depth of 0.60 m. In the case of substitution of cerrado sensu stricto by no-tillage soybean-corn rotation, a reduction of at least 11 % of the soil C pools was observed. However, the adoption of no-tillage as an alternative to tillage with a moldboard plow (conventional system) reduced CO2 emissions by up to 12 %. |