Atributos Físicos De Um Latossolo Vermelho Cultivado Com Plantas De Cobertura, Em Semeadura Direta

Torres, José Luiz Rodrigues; Pereira, Marcos Gervásio; Assis, Renato Lara de; Souza, Zigomar Menezes de

doi:10.1590/01000683rbcs20140597

Cited by 35 publications

(43 citation statements)

References 18 publications

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“…Este fato pode ter contribuído para a estruturação do solo, o que se deve, provavelmente, à ação das raízes e ao aporte de material orgânico ao longo do período de implantação do sistema. Pereira et al (2010) (Torres et al, 2015). Portugal et al (2010) avaliaram a estabilidade de agregados de um Argissolo Vermelho-Amarelo, sob diferentes usos, e verificaram menores valores de DMP em solo sob pastagem sem controle da lotação animal, os quais podem ser devidos à menor cobertura vegetal, presença de raízes e atividade biológica.…”

Section: Resultsunclassified

Qualidade Estrutural De Um Argissolo Vermelho-Amarelo Sob Diferentes Usos No Bioma Pampa No Sul Do Brasil

Silva

Nunes

Lima

et al. 2018

RBAS

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RESUMO -O uso e manejo inadequado do solo resultam em efeitos negativos para a sua estrutura, afetando atributos físicos e químicos como densidade, estabilidade dos agregados em água e teor de carbono orgânico total. Assim, objetivou-se avaliar a estabilidade dos agregados e relacioná-la com a densidade e carbono orgânico do solo sob diferentes sistemas de uso e manejo. O trabalho foi desenvolvido em uma propriedade produtora de leite, localizada no sul do Rio Grande do Sul, no bioma Pampa. O solo predominante no local é classificado como Argissolo Vermelho-Amarelo. Foram coletadas amostras de solo com estrutura preservada e não preservada, na camada de 0,0 a 0,10 m, sob pousio, milho e pastagem, visando avaliar a densidade do solo (Ds), a distribuição de tamanho e o diâmetro médio ponderado (DMP) dos agregados e carbono orgânico total (COT). Os teores de COT diferenciaram-se estatisticamente entre os sistemas e seguem uma ordem decrescente: pousio > milho > pastagem. Os maiores valores de COT, entretanto, não se refletiram em maior DMP. Foi identificada uma relação significativa e inversa entre os valores médios de COT e de Ds, nos diferentes sistemas de uso em estudo, sendo que, quanto maior o teor de carbono orgânico, menor a densidade do solo. O solo sob pastagem apresentou maior densidade, menor teor de carbono orgânico total e menor concentração de agregados estáveis de maior tamanho, indicando uma qualidade estrutural inferior aos solos das áreas sob pousio e cultivo mínimo do milho.Palavras chave: carbono orgânico, estabilidade de agregados, pastagem, agropecuária, leite.ABSTRACT -The use and inadequate management of the soil result in negative effects on its structure, affecting physical and chemical attributes such as density, aggregate stability in water and total organic carbon content. Thus, the objective was to evaluate the stability of the aggregates and to relate it to the density and organic carbon of the soil under different systems of use and management. The work was developed in a milk producing property, located in the south of Rio Grande do Sul, in the Pampa biome. The predominant soil in the place is classified like Ultisol. Soil samples with a preserved and non preserved structure were collected in the 0.0 to 0.10 m layer under fallow, corn and pasture, aiming to evaluate soil density (Ds), size distribution and weighted average diameter of aggregates (WMD) and total organic carbon (TOC). The TOC levels were statistically different between the systems and follow a decreasing order: fallow> maize> pasture. The higher TOC values, however, were not reflected in higher WMD. A significant and inverse relationship between the mean values of TOC and Ds in the different systems of study was identified, and the higher the organic carbon content, the lower the soil density. Soil under pasture presented higher density, lower total organic carbon content and lower concentration of stable aggregates of larger size, indicating a lower structural quality than the soils under fallow and minimum maize cult...

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Section: Resultsunclassified

Qualidade Estrutural De Um Argissolo Vermelho-Amarelo Sob Diferentes Usos No Bioma Pampa No Sul Do Brasil

Silva

Nunes

Lima

et al. 2018

RBAS

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“…The 0.60-0.80 m soil layers were not disturbed by any of the implements used in the treatments, moreover, the effect of compression caused by the movement of heavy machinery tends to be higher in the layers between 0,00 and 0.40m and lower in deeper layers, as evidenced by studies on sugarcane and other crops (Sene et al, 1985;. Torres and Scott, 1999;Paulino et al, 2004;Camargo et al, 2010;Cavalieri et al, 2011;Torres et al, 2015). In fact, the soil structure is maintained and the roots of the plants continue their normal development occupying the entire volume of soil after several cycles of cultivation.…”

Section: Soil Exploitation Rate and Root Distribution Ratiomentioning

confidence: 91%

“…This is due to the natural arrangement of soil particles after the accumulation of organic matter on soil surface via crop residues and in soil via the root system of sugarcane, favoring soil aggregation and consequently higher total porosity across its profile, as highlighted by Torres et al (2015).…”

Section: Macroporosity (Ma) Microporosity (Mi) and Total Porosity (Tp)mentioning

confidence: 99%

Soil physical attributes and productivity of sugarcane under different cropping systems in the savannah goiano

Lana¹,

Domingues²,

Torres³

et al. 2017

Aust J Crop Sci

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The cultivation systems of sugarcane can cause changes to the soil's physical properties and root development, which in turn, can affect the productivity of the crop. The main objective of this study was to evaluate different soil management systems and their influence on the physical attributes of soil, plant root system development and the productivity of plant cane in re-established area. The experimental design was randomized blocks in 6 x 3 factorial scheme with 4 repetitions. The soil treatments were: T 1 = Desiccation + moldboard plowing + light harrow (DPH); T 2 = Subsoiler + light harrow (SH); T 3 = Desiccation + no-tillage (DNT); T 4 = Desiccation + subsoiler (DS); T 5 = stubble thrasher + subsoiler (StS) and T 6 = stubble thrasher + mid harrow + moldboard plow + light harrow (StHPH), each evaluated at three depths (0.0-0.20; 0.20-0.40 and 0.40-0.60 m). The effects of these treatments were evaluated by analyzing physical properties of soil, root development of the plants and productivity of the crop. All evaluated tillage systems improved penetration resistance, but only to the depth of 0.20 m. The best rates of root development occurred with the T1 treatment. Root development was significantly lower with higher penetration resistance values in all evaluated systems. Sugarcane productivity was significantly higher in systems with greater soil disturbance.

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“…It was observed that in the soil surface, the SMBF succession system presented a significantly larger amount of soil constituting large aggregates, in the class larger than 2 mm, in relation to the other succession systems (Table 5). According to Basso and Reinert (1998), the values of larger aggregates tend to increase over time in systems with increased organic carbon, due to the use of cover crops under a no-tillage system (TORRES et al, 2015), resulting in a higher geometric and weighted aggregate diameter (PEREIRA et al, 2011). The higher the amount of plant material deposited in coverage, the higher will be the aggregation and lower the susceptibility to erosive processes caused by the impact of raindrops (FERREIRA; SCHWARZ; STRECK, 2000).…”

Section: Amongmentioning

confidence: 99%

The stability of aggregates and organic carbon content after the application of gypsum, soil scarification and a succession of agricultural crops

et al. 2020

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Studies related to the monitoring of soil quality by physical attributes are important for the evaluation and maintenance of the sustainability of agricultural systems, besides indicating the appropriate management of the environment, aiming at its conservation and productivity. The objective of this study was to evaluate the stability of aggregates and organic carbon after the application of gypsum, soil scarification and a succession of crops. The treatments consisted of an absence and addition of gypsum, absence and presence of soil scarification, and three systems of crops in succession. The experimental design was made of randomized blocks, in a 2x2x4 factorial scheme, with eight replications. The aggregates were evaluated as stabled in water and soil organic carbon content. The treatment where gypsum was applied, as well as the soybean/maize/brachiaria/fallow (SMBF) succession system, presented better results in soil aggregation and higher levels of organic carbon.

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Atributos Físicos De Um Latossolo Vermelho Cultivado Com Plantas De Cobertura, Em Semeadura Direta

Cited by 35 publications

References 18 publications

Qualidade Estrutural De Um Argissolo Vermelho-Amarelo Sob Diferentes Usos No Bioma Pampa No Sul Do Brasil

Qualidade Estrutural De Um Argissolo Vermelho-Amarelo Sob Diferentes Usos No Bioma Pampa No Sul Do Brasil

Soil physical attributes and productivity of sugarcane under different cropping systems in the savannah goiano

The stability of aggregates and organic carbon content after the application of gypsum, soil scarification and a succession of agricultural crops

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