Aggregation, carbon, and total soil nitrogen in crop-livestock-forest integration in the Eastern Amazon

Silva, Jéssica C. N.; Silva, Arystides R.; Veloso, C. A. C.; Dantas, Edilândia F.; Sacramento, José Augusto Amorim Silva do

doi:10.1590/1807-1929/agriambi.v22n12p837-842

Cited by 9 publications

(7 citation statements)

References 22 publications

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“…Thus, a decline in SOC potentiates soil degradation affecting food, water, and climate security. This reinforces the need to monitor SOC stocks, mainly on a regional and local scale (Fernandes et al, 2018;Silva et al, 2018), obtained by field surveys (FAO, 2017;Lal et al, 2018).…”

Section: Resultssupporting

confidence: 63%

“…Agriculture has been identified as one of the activities most responsible for the emission of carbon into the atmosphere, in the form of CO 2 . However, several studies (Cerri et al, 2004;FAO, 2017;Lal, 2018;Silva et al, 2018;Fernandes et al, 2018) show that agriculture can also act as a sink, sequestering CO 2 from the atmosphere and storing it in soil organic matter.…”

Section: Introductionmentioning

confidence: 99%

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Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil

Severiano

Pierangeli

Santos

et al. 2021

Rev. bras. eng. agríc. ambient.

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The objectives of this study were to evaluate the effect of the no-tillage system on soil bulk density, soil organic carbon, and carbon stocks in Plinthic subgroups and Oxisols, located in Pontes and Lacerda, State of Mato Grosso, Brazil. The treatments were native vegetation and no-tillage systems established for 3, 8, 10, and 12 years. To analyse soil organic carbon, soils were sampled in each area, with three repetitions, at layers of 0-0.05; 0.05-0.10; 0.10-0.20; 0.20-0.40; 0.40-0.60; 0.60-1.00; 1.00-1.50 and 1.50-2.00 m. For soil bulk density, undisturbed samples were collected at layers of 0-0.20 and 0.20-0.40 m. Compared with areas of native vegetation, soil bulk density values after 12 years increased by 25% in Oxisols and 30% in the Plinthic subgroups. In Oxisols and Plinthic subgroups, respectively, organic carbon concentration was, on average, 20.57, 25.04 g kg-1 under native vegetation; 16.82, 16.59 g kg-1 after 3 years of no-tillage; 13.31, 4.96 g kg-1 after 8 years; 16.52, 14.39 g kg-1 after 10 years; and 17.97, 18.53 g kg-1 after 12 years. In both soils, the no-tillage system contributed to an increase in carbon stocks over the years, but not at depth, being generally limited to the top 0.20 m of the soils. Compared to native vegetation, after 12 years of no-tillage, carbon stocks decreased at a rate of 0.075 Mg ha-1 year-1 in the Plinthic subgroups and increased by 2.3 Mg ha-1 year-1 in Oxisols.

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Section: Resultssupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil

Severiano

Pierangeli

Santos

et al. 2021

Rev. bras. eng. agríc. ambient.

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“…Also according to the report, the state of Rondônia occupies the third position in agricultural cultivation area (648,000 ha), of which 59% is destined for soy cultivation. Despite the impact caused by converting forest land use and occupation to agricultural crops, conservation practices have used degraded areas or integrated production systems for planting soybeans, preventing new areas from being deforested (SILVA et al, 2018). Even so, it is necessary to understand how the conversion of natural areas impacts maintaining carbon stocks in nature, so that adequate usage forms for production and conservation can be proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Ainda de acordo com o relatório, o estado de Rondônia ocupa a terceira posição em área de cultivo agrícola (648 mil ha), da qual 59% destinam-se ao cultivo de soja. Apesar do impacto causado pela conversão no uso e na ocupação do solo de florestas para cultivos agrícolas, práticas conservacionistas têm utilizado áreas degradadas ou sistemas integrados de produção para o plantio da soja, evitando que novas áreas sejam desmatadas (SILVA et al, 2018). Ainda assim, é preciso entender de que forma a conversão das áreas naturais impactam na manutenção dos estoques de carbono na natureza, para que sejam propostas formas adequadas de utilização para produção e conservação.…”

Section: Introductionunclassified

Carbon stock assessment and comparison in soybean plantations in Southwest Brazilian Amazon

Araujo

Pelissari

Corte

et al. 2022

AGRO@MBIENTE ON-LINE

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A significant proportion of deforestation in the Amazon rainforest is for the expansion of agriculture and livestock. Several studies have been dedicated to determining the carbon stock in natural forests, however agricultural areas are still poorly researched. This work aimed to quantify the above and belowground carbon stock (CS) in soybean plantations in the State of Rondonia, Southwest region of the Brazilian Amazon, as well as to compare the results with the estimate of other possible land uses in the same region. Thus, a total of 50 sampling units 1 m² were quantified at random in order to measure aboveground and belowground biomass. The total biomass found was 7.55 Mg ha-1, with 6.73 Mg ha-1 (89.14%) corresponding to aboveground biomass and 0.83 Mg ha-1 (10.86%) corresponding to belowground biomass. The average total carbon stock was 3.49 Mg ha-1, ranging from 2.14 Mg ha-1 to 6.36 Mg ha-1. In comparing the study data with the Brazilian Inventory of Anthropic Emissions and Removals of Greenhouse Gases, it was observed that the change in the use of the mature Amazon Rainforest land for soybean cultivation resulted in the loss of 176.61 Mg ha-1 of C. Therefore, soybean cultivation can be an alternative in the absence of natural vegetation with no possibility of natural recovery, because in addition to grain production, it contributes to the carbon stock and nitrogen fixation in the soil. However, replacing natural vegetation is not an adequate practice for biomass and carbon stocks.

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“…Soybean crops have been grown in newly open and agricultural areas in the Amazon region in the recent years (CONAB, 2018), mainly over degraded pasture areas. Areas that were used for livestock farming have been used for soybean crops for indirect recovery of soil fertility (Silva et al, 2018). Soil degradation can be reversed through conservationist practices, which require the adoption and technical information of soil management and cultural practices adapted and appropriate to the region (Passos et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Agronomic performance of soybean crops under integrated production systems in the Southwestern Brazilian Amazon biome

Ribeiro

Passos

Aker

2020

Rev. bras. eng. agríc. ambient.

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Soybean is an alternative crop to be used in intensified land use systems and recovery of degraded areas in Brazil. Thus, the objective of this study was to evaluate the agronomic performance of soybean crops under integrated production systems in the Southwestern Brazilian Amazon biome. Soybean crop was grown in alleys with widths of 18, 30, and 42 m between the 4-row tree sets of eucalyptus and evaluated in two agricultural years (2016-2017 and 2017-2018). Plant height, first pod insertion height, number of grains per pod, number of pods per plant, 100-grain weight, and grain yield of soybean plants at maturation stage were evaluated in different distances from the eucalyptus (10, 20, 30 and 45% of the alley width). The lowest mean grain yield was found for the alley of 18 m in the 2017-2018 agricultural year. The proximity of soybean plants to eucalyptus trees affects negatively the grain yield, plant height, first pod insertion height, plant population, and number of pods per plant. The crop-livestock-forest integration system, with the forest component consisting of 5-year-old eucalyptus trees (technical age for harvest), resulted in higher soybean grain yields for the alley of 42 m. The growth of soybean crops in alleys of 18 m between 4-row tree sets of 5-year-old eucalyptus trees is not recommended for the Southwestern region of the Brazilian Amazon biome.

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Aggregation, carbon, and total soil nitrogen in crop-livestock-forest integration in the Eastern Amazon

Cited by 9 publications

References 22 publications

Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil

Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil

Carbon stock assessment and comparison in soybean plantations in Southwest Brazilian Amazon

Agronomic performance of soybean crops under integrated production systems in the Southwestern Brazilian Amazon biome

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