Emissão de gases do efeito estufa em diferentes usos da terra no bioma Cerrado

Neto, Marcos Siqueira; Píccolo, Marisa de Cássia; Costa, Ciniro; Cerri, Carlos Clemente; Bernoux, Martial

doi:10.1590/s0100-06832011000100006

Cited by 46 publications

(17 citation statements)

References 75 publications

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“…Replacing native forest for other crop systems impact organic carbon and result in carbon emission to the atmosphere (Siqueira Neto et al, 2011). Therefore, it is essential to search for agricultural management systems that maintain or increase carbon in the soil.…”

Section: ----------------------------G Kg -1 ------------------------mentioning

confidence: 99%

Carbon Management Index and Carbon Stock of a Cohesive Oxisol Under Different in the Region Northeast of Brazil

Paes¹,

Dias²,

Fernandes³

et al. 2018

JAS

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The objective of this study was to evaluate the soil organic carbon fractions and the carbon management index (CMI) in a cohesive oxisol under different uses. Conventional cassava planting (CC), pasture (PP), and 7-and 12-year agroforestry systems (AF7 and AF12, respectively), were tested against secondary forest (SF). Soil samples of these areas were physically fractionated in order to determine total organic matter (TOC) as well as the labile-(LOC) and non-labile (NOC) fractions of the soil organic matter, as well as carbon management index (CMI). Total organic C ranged from 14.17 to 27.20 g kg -1 of soil, showing no differences in the surface layer among the land uses as compared to the secondary forest. No differences were found in the surface layer for LOC as well, except for the AF12 where LOC was higher. This condition accounts for higher microbial activity and nutrient cycling in the soil. This system also showed higher CMI values, pointing to a better response of soil quality under long-term agroforestry system. This system improved soil organic matter, regardless of the depth. On the other hand, conventional cassava and planted pasture systems reduced carbon in soil. In conclusion, the agroforestry system is the best choice of farmers, when they seek for better soil quality.

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Section: ----------------------------G Kg -1 ------------------------mentioning

confidence: 99%

Carbon Management Index and Carbon Stock of a Cohesive Oxisol Under Different in the Region Northeast of Brazil

Paes¹,

Dias²,

Fernandes³

et al. 2018

JAS

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“…Portanto, um dos principais e mais severos problemas encontrados pela dinâmica de desmatamento para uso agrícola no Cerrado é a fragilidade química e estrutural dos solos, que tendem a perder rapidamente o carbono do solo por mineralização e erosão. Contudo, esse tipo de impacto ocorre com maior intensidade principalmente em áreas de pastagem, onde existe atividade extensiva da pecuária e agricultura, sem práticas conservacionistas de manejo, que causam altas taxas de perdas de carbono dos solos e aumento nos gases de efeito estufa (GEE) (ROSOLEN et al, 2012;CARVALHO et al, 2010;NETO et al, 2011).…”

Section: Introductionunclassified

Mapeamento da mudança do uso e cobertura das terras do município de Britânia do ano de 1985 até 2015 e sua relação com o avanço do setor agropecuário

Nicolau

Silva

Schlapbach³

2019

R. bras. Geom.

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“…Approximately 50% of the total N uptake by common bean is removed by the seeds (Fancelli and Dourado, 2007). In addition, the use of N fertilizers to replace lost N increases production costs and contributes to environmental problems in Cerrado soils, such as ground-water contamination by nitrates under irrigated production systems (Bortolotto et al, 2012) and also increased greenhouse gas emissions (Siqueira Neto et al, 2011).…”

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Green Manure Species and Sowing Time Effects on the Agronomic Performance of Common Bean

2013

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An evaluation of sowing date effects on the development of green manure species and the subsequent effects on the agronomic performance of common bean (Phaseolus vulgaris L.) was conducted using three consecutive years of field trials. A randomized block design was used with a factorial treatment structure of 3 yr, three sowing dates and five green manure species {sunn hemp [Crotalaria juncea L.], slender leaf rattlebox [C. ochroleuca G. Don], velvet bean[Mucuna pruriens L.], pigeon pea [Cajanus cajan (L.) Millsp.], and jack bean [Canavalia ensiformis (L.) DC.]}, aiming to determine the agronomical performance of common bean in response to species and sowing date of different green manures. The dependent variables used to evaluate green manure development were "green manure shoot dry mass (GMSDM), green manure N accumulation (GMNA) and green manure nitrogen accumulation efficiency (GMNAE)". For common bean "common bean leaf area index (CBLAI), common bean shoot dry mass (CBSDM), number of pods per plant (NPP), number of grains per pod (NGP), total of grains per plant (TGP), 100-grain weight (100GW), grain yield (GY), grain harvest index (GHI), and nitrogen use efficiency (NUE)" were used to evaluate common bean performance. The GMSDM and GMNA both decreased when the green manure were sown in February rather than November, with the exception of velvet bean. Although the GMNA varied with year, species, and planting date, values above 90 kg ha -1 were common after November and December sowing and were sufficient to ensure good GY levels of subsequent common bean. Pigeon pea stood out because of its positive effect on the CBLAI, CBSDM, and NUE values of subsequent common bean. The GMNAE, NPP, NGP, NUE, and GHI were significantly correlated with GY. The best combination of these variables resulted in a common bean GY of 2000 kg ha -1 , which is 57% higher than the Brazilian average. These results indicate that the use of green manure can contribute to the sustainability of organic production systems in tropical regions.

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Emissão de gases do efeito estufa em diferentes usos da terra no bioma Cerrado

Abstract: A conversão de áreas nativas com o corte e queima de vegetação seguida do cultivo do solo resultam em mudanças na dinâmica da matéria orgânica do solo, com alterações nas emissões dos gases causadores de efeito estufa (GEE: CO

Cited by 46 publications

References 75 publications

Carbon Management Index and Carbon Stock of a Cohesive Oxisol Under Different in the Region Northeast of Brazil

Carbon Management Index and Carbon Stock of a Cohesive Oxisol Under Different in the Region Northeast of Brazil

Mapeamento da mudança do uso e cobertura das terras do município de Britânia do ano de 1985 até 2015 e sua relação com o avanço do setor agropecuário

Green Manure Species and Sowing Time Effects on the Agronomic Performance of Common Bean

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