Emission of Nitrous Oxide and Methane in Soil From Pasture Recovery Areas in the Amazon Matogrossense

Nogueira, A. K. da S.; Rodrigues, Renato de Aragão Ribeiro; Castro, Bruno; Nogueira, Thiago F.; Silva, Jacqueline J. N. da; Behling, Maurel; Mombach, M. A.; Armacolo, Natassia Magalhães; Silveira, Júlia Graziela da

doi:10.5935/0100-4042.20150109

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…O clima da região é caracterizado como Aw (tropical com inverno seco), conforme classificação de Köppen-Geiger, com 25ºC de média anual de temperatura, e 2.550 mm de média anual de precipitação (Inmet, 2016 3 ) e mais três coletas de ar de dentro de cada câmara estática (modelo topo-base), a cada 20 min, conforme Nogueira et al (2015).…”

Section: Methodsunclassified

Fluxos de óxido nitroso em sistema de integração lavoura-pecuária-floresta

Nogueira

Rodrigues

Silva

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o potencial de mitigação de óxido nitroso (N 2 O) em sistema de integração lavoura-pecuária-floresta (ILPF), em comparação ao monocultivo, e identificar os principais fatores que regulam as emissões deste gás. O experimento foi realizado em Sinop, MT, entre as safras 2012/2013 e 2013/2014, e avaliou os seguintes tratamentos: floresta, lavoura e pastagem, além do ILPF. Durante a realização do experimento, não houve presença de bovinos nas áreas com pastagem. Amostras de óxido nitroso foram coletadas semanalmente, com uso de câmaras estáticas, modelo topo-base. As concentrações do gás foram determinadas por meio de cromatografia gasosa. A precipitação pluvial e a disponibilidade de N foram os principais fatores reguladores das emissões de N 2 O. O sistema de ILPF apresenta potencial promissor para mitigar as emissões de N 2 O, com emissão acumulada de 0,367 kg ha -1 de N, em comparação a de 1,401 kg ha -1 emitidas pela lavoura; de 0,298 kg ha -1 , pela pastagem; e de 0,165 kg ha -1 , pela floresta.Termos para indexação: gases de efeito estufa, mudança do clima, sistemas integrados de produção. Nitrous oxide fluxes in an integrated crop-livestock-forestry systemAbstract -The objective of this work was to evaluate the mitigation potential of nitrous oxide in an integrated crop-livestock-forestry system (ICLF), compared with monocultures, and to identify the main factors that regulate the emissions of this gas. The experiment was conducted in the municipality of Sinop, in the state of Mato Grosso, Brazil, between the 2012/2013 and 2013/2014 crop seasons, with the evaluation of the following treatments: forest, crop and pasture, besides ICLF. During the experiment, no cattle were present in the pasture areas. Nitrous oxide samples were collected weekly using top-down static chambers. Gas concentrations were determined with gas chromatography. Rainfall and N availability were main factors regulating N 2 O emissions. The ICLF system has promising potential to mitigate N 2 O emissions, with 0.367 kg ha -1 N accumulated emission, compared with 1.401 kg ha -1 from cropland, 0.298 kg ha -1 from pasture, and 0.165 kg ha -1 from forest.

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Section: Methodsunclassified

Fluxos de óxido nitroso em sistema de integração lavoura-pecuária-floresta

Nogueira

Rodrigues

Silva

et al. 2016

Pesq. agropec. bras.

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“…The restoration process can be direct or indirect, depending on the degree of pasture degradation. In most cases it is necessary to prepare the soil and perform fertilization (Nogueira et al, 2015).…”

Section: Pasture Degradation In Brazilmentioning

confidence: 99%

Degradation Process, Phytosociology and Restoration of Grasses Used for Grazing Ruminants in Brazil

2020

THE JAPS

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The aim of this study is to present the main pasture grasses used in Brazil, the process of pasture degradation, pasture phytosociology, some undesirable pasture plants, and pasture restoration techniques. A wide plant availability and the high forage yield of its pastures make Brazil an important producer of plants for animal feed. The great majority of pastures in Brazil contain grasses of the genus Brachiaria, known for its strength and high forage potential. However, the pastures are undergoing constant degradation caused by improper handling, which leads to unsustainability. This is possibly due to extensive and extractive exploitation using a low level of technology and unsuitable management practices. Based on the principle that pastures can be restored, alternative techniques are required to promote improvements in forage quality. For this, it is important to recognize the undesirable pasture plants, which directly interfere with livestock production by competing with forage species for water, nutrients, space and light, as well as producing phytotoxins that prevent or suppress the growth of forage species. In the process of pasture restoration, the main objective is to maintain the vital functions of the ecosystem and to mitigate damage from undesirable plants through the immediate coverage of the soil.

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“…Half of this area is in the process of degradation. Degradation reduces soil quality and influences the soil-plant-animal interface, resulting in low rates of bovine productivity and low economic return [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, although it is known that degraded soils present high erosion rates, nutrient losses and soil compaction, little is known about how this degradation is reflected in the soil. A relevant factor is related to animal management and inadequate grazing, characterized by excessive stocking rate and lack of nutrient replenishment to the soil, which may be aggravated by water deficit, pest incidence, disease and lack of knowledge on the management of variability of soil properties [2,4,5,[8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of the Spatial Variability of Soil Nutrients and Economics of Precision Management in Degraded Pastures

Carneiro¹,

Leite²,

Ferreira

et al. 2022

Grasses

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Most Brazilian pastures are in some stage of degradation, either by the reduction of soil fertility or inadequate management. The objective of this study was to diagnose the stage of pasture degradation and the diagnosis and management of the spatial variability of available phosphorus (P) and potassium (K+). A total of 100 soil samples were collected at a depth of 0–20 cm for available P and K+ contents determination. Geostatistical analyses of the obtained data were carried out to produce maps of the spatial distribution of available P and K+, using kriging, and allow the recommendation of fertilizers doses. The cost/benefit ratio of fertilizer recommendation and application was evaluated at fixed and variable rates. The different stages of pasture degradation were directly related to the reduction of soil fertility, as well as to the adopted management. The variability of soil available P and K+ presented spatial dependence, and the pattern of distribution resulted in the stage of the pasture degradation. The diagnosis of the level of pasture degradation associated with the use of geostatistical techniques under a precision agriculture perspective favors the efficient use of fertilizers, as well as correct decision-making and cost reduction regarding soil management.

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Emission of Nitrous Oxide and Methane in Soil From Pasture Recovery Areas in the Amazon Matogrossense

Cited by 7 publications

References 2 publications

Fluxos de óxido nitroso em sistema de integração lavoura-pecuária-floresta

Fluxos de óxido nitroso em sistema de integração lavoura-pecuária-floresta

Degradation Process, Phytosociology and Restoration of Grasses Used for Grazing Ruminants in Brazil

Diagnosis of the Spatial Variability of Soil Nutrients and Economics of Precision Management in Degraded Pastures

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