Rotação de culturas no sistema plantio direto em Tibagi (PR): I - Sequestro de carbono no solo

Neto, Marcos Siqueira; Filho, Solismar de Paiva Venzke; Píccolo, Marisa de Cássia; Cerri, Carlos Eduardo Pellegrino; Cerri, Carlos Clemente

doi:10.1590/s0100-06832009000400025

Cited by 15 publications

(17 citation statements)

References 37 publications

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“…In the 1999/2000 growing season, the average emissions of CT and NT were 0.75 and 0.80 kg ha -1 h -1 C-CO 2 , respectively, and 1.28 and 1.27 kg ha -1 h -1 C-CO 2 for the same treatments in the 2000/2001 growing season (Table 1). These results are in agreement with climate conditions reported previously and with other studies carried out with C-CO 2 emissions in Southern Brazil (Costa et al, 2008;Siqueira Neto et al, 2009). Franzluebbers et al (1995) conducted a long-term experiment in the South-Central region of Texas, USA, with a mean annual temperature of 20 ºC and mean precipitation of 1,000 mm (i.e., similar climatic conditions to Southern Brazil) and reported mean annual emissions of 0.65-1.02 kg ha -1 h -1 C-CO 2 , for NT with crop rotation and CT with monoculture system, respectively.…”

Section: C-co 2 Efflux From Tillage and Cropping Systemssupporting

confidence: 93%

“…A similar trend had previously been reported by Franzluebbers et al (1995), Costa et al (2008) andSiqueira Neto et al (2009). However, periods with distinct patterns also occurred, e.g., between December 1999 and January 2000, when, even at high air temperatures, low C-CO 2 emissions were observed, probably related to low soil moisture (Figure 3).…”

Section: C-co 2 Efflux From Tillage and Cropping Systemssupporting

confidence: 87%

“…However, periods with distinct patterns also occurred, e.g., between December 1999 and January 2000, when, even at high air temperatures, low C-CO 2 emissions were observed, probably related to low soil moisture (Figure 3). Air temperature, soil moisture and their interactions effects on soil C-CO 2 emissions have been frequently reported in the literature (Kucera & Kirkham, 1971;Franzluebbers et al, 1995;Mielnick, 1996;Moreira & Siqueira, 2002;Costa et al, 2008;Siqueira Neto et al (2009);Chavez et al, 2009). However, in this study, averaged across cropping systems, no significant correlation with soil moisture was observed in the C-CO 2 efflux from the tillage systems CT (r=0.135, p=0.097) and NT (r=0.011, p=0.89).…”

Section: C-co 2 Efflux From Tillage and Cropping Systemsmentioning

confidence: 43%

“…Tillage and cropping systems also affect the microbial ecology and activity (Vargas & Scholles, 2000). Comparing long-term NT in Paraná State, Siqueira Neto et al (2009) reported that the increase in time of NT adoption from 12 to 22 years resulted in higher C-CO 2 emissions. In that study, it was observed that the seasonal C-CO 2 emissions followed the temperature fluctuation during the year, i.e., in months with low temperature, as in July, C-CO 2 emission was only 40 % of the months with high temperature, as in October.…”

Section: Introductionmentioning

confidence: 99%

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Long-term C-CO2 emissions and carbon crop residue mineralization in an oxisol under different tillage and crop rotation systems

Campos

Amado

Tornquist

et al. 2011

Rev. Bras. Ciênc. Solo

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Soil C-CO 2 emissions are sensitive indicators of management system impacts on soil organic matter (SOM). The main soil C-CO 2 sources at the soil-plant interface are the decomposition of crop residues, SOM turnover, and respiration of roots and soil biota. The objectives of this study were to evaluate the impacts of tillage and cropping systems on long-term soil C-CO 2 emissions and their relationship with carbon (C) mineralization of crop residues. A long-term experiment was conducted in a Red Oxisol in Cruz Alta, RS, Brazil, with subtropical climate Cfa (Köppen classification), mean annual precipitation of 1,774 mm and mean annual temperature of 19.2 o C. Treatments consisted of two tillage systems: (a) conventional tillage (CT) and (b) no tillage (NT) in combination with three cropping systems: (a) R0-monoculture system (soybean/wheat), (b) R1-winter crop rotation (soybean/wheat/soybean/black oat), and (c) R2-intensive crop rotation (soybean/ black oat/soybean/black oat + common vetch/maize/oilseed radish/wheat). The soil C-CO 2 efflux was measured every 14 days for two years (48 measurements), by trapping the CO 2 in an alkaline solution. The soil gravimetric moisture in the 0-0.05 m layer was determined concomitantly with the C-CO 2 efflux measurements. The crop residue C mineralization was evaluated with the mesh-bag method, with sampling 14, 28, 56, 84, 112, and 140 days after the beginning of the evaluation period for C measurements. Four C conservation indexes were used to assess the relation between C-CO 2 efflux and soil C stock and its compartments. The crop Brazil. residue C mineralization fit an exponential model in time. For black oat, wheat and maize residues, C mineralization was higher in CT than NT, while for soybean it was similar. Soil moisture was higher in NT than CT, mainly in the second year of evaluation. There was no difference in tillage systems for annual average C-CO 2 emissions, but in some individual evaluations, differences between tillage systems were noticed for C-CO 2 evolution. Soil C-CO 2 effluxes followed a bi-modal pattern, with peaks in October/November and February/March. The highest emission was recorded in the summer and the lowest in the winter. The C-CO 2 effluxes were weakly correlated to air temperature and not correlated to soil moisture. Based on the soil C conservation indexes investigated, NT associated to intensive crop rotation was more C conserving than CT with monoculture.Index terms: management systems, no tillage, conventional tillage, greenhouse gases. RESUMO: EMISSÕES DE C-CO 2 DE LONGO PRAZO E A MINERALIZAÇÃO DO CARBONO DOS RESÍDUOS CULTURAIS EM UM LATOSSOLO SOB DIFERENTES SISTEMAS DE PREPARO E ROTAÇÃO DE CULTURAS A emissão de C-CO 2 do solo é considerada um indicador sensível dos impactos de sistemas de manejo sobre a matéria orgânica do solo (MOS). Nos sistemas agrícolas, as principais fontes de C-CO 2 são as decomposições dos resíduos culturais e da MOS, além da respiração das raízes das culturas e da biota do solo. O principal objetivo de...

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Section: C-co 2 Efflux From Tillage and Cropping Systemssupporting

confidence: 93%

Section: C-co 2 Efflux From Tillage and Cropping Systemssupporting

confidence: 87%

Section: C-co 2 Efflux From Tillage and Cropping Systemsmentioning

confidence: 43%

Section: Introductionmentioning

confidence: 99%

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Long-term C-CO2 emissions and carbon crop residue mineralization in an oxisol under different tillage and crop rotation systems

Campos

Amado

Tornquist

et al. 2011

Rev. Bras. Ciênc. Solo

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“…O N é o nutriente absorvido em maior quantidade, seguido do K, P, Ca e Mg (Coelho & França, 1995;Vasconcellos et al, 1998). Do ponto de vista da fertilidade do solo, diversos trabalhos mostraram o efeito da mineralização dos resíduos culturais no acúmulo de nutrientes na camada superficial do solo, influenciando as culturas em rotação (Sá, 1993;Sá et al, 1999;Purnomo et al, 2000;Sá et al, 2001;Aita & Giacomini, 2003;GamaRodrigues et al, 2007;Siqueira Neto et al, 2009). Recentemente, Ferreira et al (2009) reportaram que genótipos de milho apresentam comportamento diferenciado no aproveitamento do nitrogênio mineralizado da palha e no comprimento radicular quando submetidos a diferentes quantidades de palha de aveia-preta na superfície do solo.…”

Section: Introductionunclassified

Crescimento radicular, extração de nutrientes e produção de grãos de genótipos de milho em diferentes quantidades de palha de aveia-preta em plantio direto

Sá¹,

Ferreira

Briedis

et al. 2010

Rev. Bras. Ciênc. Solo

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RESUMOA manutenção da palha na superfície do solo atua principalmente na proteção contra o impacto das gotas de chuva, reduzindo a desagregação, o escorrimento superficial, o transporte de sedimentos e, consequentemente, a erosão. Essa proteção pode ter efeitos significativos nos atributos da planta de milho. O objetivo deste trabalho foi avaliar o efeito da quantidade de palha de aveia-preta em plantio direto no crescimento radicular, na extração de nutrientes e na produção de grãos de genótipos de milho. O experimento foi conduzido em um Latossolo Vermelho distrófico típico, em delineamento experimental de blocos ao acaso em parcelas subdivididas, com três repetições. A parcela principal foi representada pela quantidade de palha na superfície do solo (0, sem palha; 5,0; e 10,0 Mg ha -1 ), e a subparcela, constituída por 13 genótipos de milho. A quantidade de palha alterou significativamente o comprimento radicular e a altura de requeima. Todavia, a interação entre palha e genótipo alterou significativamente as variáveis estudadas. O sistema radicular das plantas de milho foi beneficiado por doses adicionais de palha tanto na camada superficial (0-20 cm ) como na subsuperficial (50-100 cm) do solo. O aumento na quantidade de palha na superfície do solo resultou na maior extração total de N, P e K e não alterou a extração total dos elementos Ca, Mg e S pela planta de milho.Termos de indexação: Zea mays, sistema radicular, resíduos culturais.(1) Recebido para publicação em junho de 2009 e aprovado em maio de 2010.(2) Professor Adjunto,

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Cover crops and no-till effects on physical fractions of soil organic matter

Nascente

Crusciol

2013

Soil and Tillage Research

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Rotação de culturas no sistema plantio direto em Tibagi (PR): I - Sequestro de carbono no solo

Cited by 15 publications

References 37 publications

Long-term C-CO2 emissions and carbon crop residue mineralization in an oxisol under different tillage and crop rotation systems

Long-term C-CO2 emissions and carbon crop residue mineralization in an oxisol under different tillage and crop rotation systems

Crescimento radicular, extração de nutrientes e produção de grãos de genótipos de milho em diferentes quantidades de palha de aveia-preta em plantio direto

Cover crops and no-till effects on physical fractions of soil organic matter

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