Preparo do solo em áreas de produção de grãos, silagem e pastejo: efeito na resistência tênsil e friabilidade de agregados

Bavoso, Marina Araújo; Giarola, Neyde Fabíola Balarezo; Tormena, Cássio Antônio; Pauletti, Volnei

doi:10.1590/s0100-06832010000100023

Cited by 20 publications

(22 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…) when comparing the MA system with the TC system, while in the 10-20 cm layer the amount of lost CL decreased, the greatest loss being 0.61 g kg -1 from the MA system to the TC system, possibly more favorable to microbial activity and less protection of the CL inside smaller aggregates, similarly to results found by Bavoso et al (2010) and Ferreira et al (2011). A difference was found (p>0.05) in CL levels at the 0-5 cm and 5-10 cm depths between the MA system and the other systems (T5, T8, PA, TCP and TC).…”

Section: Agroforest System With Teak and Cocoa Tcsupporting

confidence: 76%

“…The difference found in the 10-20 cm layer between MA and TC regarding CL, according to Aguiar et al (2009), was probably due to the lack of grass species to help structure the soil. Bavoso et al (2010) concluded that different land use systems did to add significant values of MOS accumulation between the sampled systems, and results confirm and demonstrate that CL levels in the MOS are largely susceptible to the quality of soil management systems, enabling to check the short-and medium-term effect depending on the management being used (FABRIZZI et al, 2008, cited by CHAVEZ et al, 2009. …”

Section: Agroforest System With Teak and Cocoa Tcmentioning

confidence: 75%

See 1 more Smart Citation

Oxidizable fraction of organic carbon in an Argisol under different land use systems

Müller

Weber

Scaramuzza

2012

CERNE

View full text Add to dashboard Cite

ABSTRACT:The objective of this study was to evaluate carbon input in labile and stable fractions in an ARGISOL of northwestern Brazil under different land use systems. Use systems being evaluated include: forest -MA (reference), agrosilvopasture -TCP (teak, cocoa and pasture); agroforest -TC (teak and cocoa); teak forest at 8 and 5 years -T8 and T5, and pasture -PA. In each system three furrows were made at depths of 0-5 cm, 5-10 cm and 10-20 cm. An area consisting of native vegetation (forest) adjacent to the experiment was sampled and used as control treatment. The use systems MA, T8 and T5 had higher levels of total organic carbon (COT) and the MA system had higher levels of labile carbon (CL) than the other systems, with the exception of TC at a depth of 10-20 cm. In the MA system, COT levels were higher in comparison to use systems TCP, TC and PA while CL levels were higher than the levels observed in use systems TCP and TC. In most cases being analyzed, CL levels were lower than COT levels, therefore this trait can be used as an indicator to assess anthropogenic changes relating to the maintenance or condition of soil organic matter.Key words: Soil compartments, Amazonia, lability. FRAÇÃO OXIDÁVEL DO CARBONO ORGÂNICO DE UM ARGISSOLO SOB DIFERENTES SISTEMAS DE USO

show abstract

Section: Agroforest System With Teak and Cocoa Tcsupporting

confidence: 76%

Section: Agroforest System With Teak and Cocoa Tcmentioning

confidence: 75%

Oxidizable fraction of organic carbon in an Argisol under different land use systems

Müller

Weber

Scaramuzza

2012

CERNE

View full text Add to dashboard Cite

show abstract

“…One alternative to reduce the trampling impact would be to cut the forage and feed it to the animals in the trough, as in the ensiling and haying. However, the pressure on the soil, through heavy traffic and the agriculture machinery mass in order to cut the plants might also result in soil compaction (BAVOSO et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Soil physico-hydrical properties resulting from the management in Integrated Production Systems

Auler¹,

Miara²,

Pires³

et al. 2014

Rev. Ciênc. Agron.

View full text Add to dashboard Cite

-Anthropic action, such as the soil use and management systems, promote changes in the soil structure. These changes might hamper the development of plants in soil management practices that involve its mobilization, and the negative effects might be increased due to intensive use. The aim of this study was to evaluate the physico-hydrical properties of a Haplohumox in integrated production systems under different soil managements. The soil superficial (0.0-0.10 m) and subsuperficial (0.10-0.20 m) layers were evaluated in the different systems: conventional tillage (CT), minimum tillage (MT), no-tillage (NT) and chiseled no-tillage (CNT), taking into consideration the annual ryegrass cropped for different uses [cover crop (C), grazing (G) and silage (S)] during the winter. Soil bulk density (Db), total porosity (TP), macro (Ma) and microporosity (Mi), water retention curves (SWRC) and water retention due to pore size (r) were determined. The annual ryegrass used as C produced lower Db and Mi and higher TP and Ma in CT, MT and CNT systems. No difference was verified between G and S in any of the management systems or soil layers. The superficial layer SWRC presented similar behavior regarding CT, MT and CNT. Under NT, C resulted in higher water retention. However, G and S provided higher water retention due to the pore size in this system. Key words: Haplohumox. No-tillage. Soil physical quality. Crop-livestock integration. Agriculture sustainability.RESUMO -As ações antrópicas, como os sistemas de uso e manejo do solo, promovem alterações em sua estrutura. Estas alterações podem ser restritivas ao desenvolvimento das plantas em manejos do solo que envolva sua mobilização, tendo seus efeitos negativos potencializados pela maior intensificação de uso. O objetivo deste trabalho foi avaliar os atributos físico-hídricos de um Latossolo Bruno argiloso em sistemas integrados de produção sob distintos manejos de solo. Para isso avaliou-se a camada superficial (0.0-0.10 m) e subsuperficial (0.10-0.20 m) do solo nos sistemas de cultivo convencional (CT), mínimo (MT), plantio direto (NT) e plantio direto escarificado (CNT) sob diferentes usos da cultura do azevém [planta de cobertura (C), pastejo (G) e silagem (S)]. Determinou-se a densidade (Db), porosidade total (TP), macro (Ma) e microporosidade (Mi), as curvas de retenção de água (CRA) e a retenção de água em função do raio de poro (r). O uso do azevém como C proporcionou menores Db e Mi e maiores TP e Ma nos sistemas CT, MT e CNT. Não foram verificadas diferenças entre G e S para todos os manejos, em ambas as camadas de solo. As CRA da camada superficial entre CT, MT e CNT apresentaram comportamento semelhante. No NT, C proporcionou uma maior retenção de água. Entretanto, G e S proporcionaram maior a retenção de água em função dos raios de poros no NT.Palavras-chave: Latossolo Bruno. Plantio direto. Qualidade física do solo. Integração lavoura-pecuária. Sustentabilidade agrícola.*Autor para correspondência 1 Recebido para publicação em 10/05/2014; aprovado em ...

show abstract

“…Therefore, the faulty zones (pores) inside aggregates reduce, connecting the mineral particles or rearranging them, increasing the resistance of aggregates to breakage, and thus raising TS values. Bavoso et al (2010) observed that no-tillage provided larger TS values than other soil management systems. Tormena et al (2008b) verified that the cultivated areas had higher TS values than those of the fallow and the native forest.…”

Section: Resultsmentioning

confidence: 88%

Tensile strength, friability, aggregation, and soil organic matter physical fractions of an Oxisol cultivated with sugarcane

Kunde

Lima

Silva

et al. 2018

Pesq. agropec. bras.

View full text Add to dashboard Cite

-The objective of this work was to evaluate the tensile strength, friability, aggregation, and the physical fractions of soil organic matter of a Rhodic Hapludox cultivated with sugarcane (Saccharum officinarum). The treatments consisted of one, three, and five years of cultivation of sugarcane, in the state of Rio Grande do Sul, Brazil. As a reference, a native forest adjacent to the cultivation area, with soil and relief characteristics similar to those of the cultivation areas, was used. Deformed samples were collected at 0.00-0.05, 0.05-0.10, and 0.10-0.20-m soil depths, for the determination of the soil physical attributes and for the physical fractionation of particle-size and density of the organic matter. The physical attribute evaluations were able to detect changes in the structural quality of the Oxisol, which resulted from the sugarcane cultivation. In comparison with the native forest, the stability and tensile strength of the aggregates decreased with the time of sugarcane cultivation. Tensile strength increased with soil depth, proportionally to the reduction of total soil organic carbon content. Soil preparation and straw burning reduce the input of fresh organic matter into the soil and accelerate the decomposition of the labile organic matter compartment, with negative consequences to soil physical properties over time.Index terms: Saccharum officinarum, organic carbon, organic matter fractionation, soil physical quality. Resistência tênsil, friabilidade, agregação e frações físicas da matéria orgânica de um Latossolo Vermelho cultivado com cana-de-açúcarResumo -O objetivo deste trabalho foi avaliar a resistência tênsil, a friabilidade, a agregação e as frações físicas da matéria orgânica de um Latossolo Vermelho cultivado com cana-de-açúcar (Saccharum officinarum). Os tratamentos consistiram de um, três e cinco anos de cultivo de cana-de-açúcar, no Estado do Rio Grande do Sul. Como referência, utilizou-se uma mata nativa, adjacente à área de cultivo, com características de solo e relevo similares às das áreas de cultivo. Foram coletadas amostras deformadas à profundidade de 0,00-0,05, 0,05-0,10 e 0,10-0,20 m, para determinação dos atributos físicos do solo e para o fracionamento físico densimétrico e granulométrico da matéria orgânica. As avaliações dos atributos físicos foram capazes de detectar alterações da qualidade estrutural do Latossolo resultantes do cultivo de cana-de-açúcar. Em comparação à mata nativa, a estabilidade e a resistência tênsil dos agregados diminuíram com o tempo de cultivo da cana-de-açúcar. A resistência tênsil aumentou com a profundidade no solo, proporcionalmente à redução dos teores de carbono orgânico total. O preparo do solo e a queima da palhada reduzem o aporte de matéria orgânica fresca ao solo e aceleram a decomposição do compartimento lábil da matéria orgânica, com consequências negativas às propriedades físicas do solo ao longo do tempo.Termos para indexação: Saccharum officinarum, carbono orgânico, fracionamento da matéria orgânica, qualidade físi...

show abstract

Preparo do solo em áreas de produção de grãos, silagem e pastejo: efeito na resistência tênsil e friabilidade de agregados

Cited by 20 publications

References 27 publications

Oxidizable fraction of organic carbon in an Argisol under different land use systems

Oxidizable fraction of organic carbon in an Argisol under different land use systems

Soil physico-hydrical properties resulting from the management in Integrated Production Systems

Tensile strength, friability, aggregation, and soil organic matter physical fractions of an Oxisol cultivated with sugarcane

Contact Info

Product

Resources

About