Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping

Salazar, María Paz; Soracco, Carlos Germán; Villarreal, Rafael; Polich, Nicolás Guillermo; Bellora, Guido Lautaro; Turinetto, Matías Javier; Lozano, Luis Alberto

doi:10.36783/18069657rbcs20200103

Cited by 2 publications

(2 citation statements)

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“…In this tropical sandy soil, a short period (5 yr) of implementation of a crop rotation system with cover crops and no‐till in a degraded pasture increased all fractions of total organic C stock. In temperate climates and soils of higher fertility, such changes can take up to 10 yr and are mainly reflected in soil total organic C and particulate organic C (Plaza‐Bonilla et al., 2014; Salazar et al., 2020). Thus, the practices proposed in the present study can restore degraded soils and increase C sequestration to quickly restore yield potential.…”

Section: Discussionmentioning

confidence: 99%

“…Soil organic matter is one of the main indicators of soil quality (Raphael et al., 2016; Tadini et al., 2021), as it reflects chemical (Costa et al., 2020), physical (Salazar et al., 2020), and microbiological attributes (Rottmann et al., 2010) that can increase crop yield potential (Lal, 2020). Increasing organic matter content increases C sequestration in the soil, which can mitigate the negative effects of the greenhouse effect (Cotrufo et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

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Soil organic carbon stock is improved by cover crops in a tropical sandy soil

et al. 2022

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Soil organic matter plays an important role in soil quality. In sandy soils of tropical regions, high biological activity in the soil accelerates mineralization and limits increases in organic matter content. The objective of this study was to evaluate the total organic C stock and the chemical and physical fractions of organic C in a sandy soil in Presidente Bernardes, São Paulo, Brazil, as a function of cover cropping with different combinations of grasses and legumes between 2015 and 2020. The treatments comprised fallow (control), cultivation of a single grass or intercropping of two grasses, one grass and one legume, or a mixture of two grasses and one legume during the offseason (April-September). Intercropping two grasses increased total dry matter production (shoot and root) by 138% and decreased the C/N ratio by 19% compared with the fallow and legume systems. The organic C stock in the soil was 46% higher in the mixed cover crop system (36.5 Mg ha −1 ) than in the fallow system (25 Mg ha −1 ). Humic acid (0.78-0.82 g kg −1 ) and humin (1.68-1.99 g kg −1 ) were lower in the systems with low dry matter production (fallow and grass + legume). Mineral-associated C content was 114% higher in the mixed cover crop system than in the fallow system. These results show that cover crops can increase C content in all fractions of organic matter in tropical sandy soil, even in a short period of time (5 yr), and that a mix of cover crops is the best option.

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Section: Discussionmentioning

confidence: 99%