Efeito Da Profundidade De Trabalho Na Qualidade Da Operação De Subsolagem Para Implantação Florestal1

Gonçalves, Saulo Boldrini; Lopes, Eduardo da Silva; Fiedler, Nilton César; Cavalieri, Karina Maria Vieira; Stahl, James; Drinko, Carlos Henrique

doi:10.1590/0100-67622016000100004

Cited by 6 publications

(8 citation statements)

References 7 publications

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“…There was a difference of about 12 t ha -1 between the treatments where the soil cultivation was minimal. The use of a subsoiler increased plant survival and growth, allowing roots to reach greater depths, reducing the area of soil without plant cover, and reducing losses by erosion (Sasaki and Gonçalves, 2005;Gonçalves et al, 2016). The subsoiler was also used for the purpose of eliminating or minimizing the negative effects of soil compaction (Grotta et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Sugarcane Root Development and Yield under Different Soil Tillage Practices

Moraes

Mageste

Lana

et al. 2019

Rev. Bras. Ciênc. Solo

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New strategies for sugarcane production have been very important since the incorporation of ethanol in the Brazilian energy mix in the early 1970s. Prior to planting sugarcane, the soil is prepared, and this process can affect root development and, consequently, sugarcane production. This study was conducted in an area of sugarcane crop renewal in the Cerrado biome (Brazilian tropical savanna), with the objective of identifying which tillage system generates the better root development and improved yield in sugarcane. The treatments were: 1) weed desiccation + moldboard plowing (0.4 m) + mild spike tooth harrowing (0.15 m); 2) subsoiler (0.3 m) + mild spike tooth harrowing (0.15 m); 3) weed desiccation + no-tillage (furrow opening and fertilizer); 4) weed desiccation + subsoiler (0.4 m); 5) ratoon destruction + subsoiler (0.4 m); 6) ratoon destruction + spike tooth harrowing (0.2 m) + moldboard plowing (0.4 m) + mild spike tooth harrowing (0.15 m). Characteristics of the sugarcane root system, such as the root length density, average distance between roots, and root soil exploration, after the first harvest (1.5 years) were studied. Root length density was greater for the treatments that included plowing (0.4 m) and harrowing (0.15 m) operations. The average distance between roots was low in the no-tillage system. The highest sugarcane yield in the plant crop was achieved by management practices with more extensive soil profile disturbances, like plowing followed by harrowing.

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Section: Resultsmentioning

confidence: 99%

Sugarcane Root Development and Yield under Different Soil Tillage Practices

Moraes

Mageste

Lana

et al. 2019

Rev. Bras. Ciênc. Solo

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“…A soil portion was carefully removed to measure the shape of the groove with the aid of a hoe. There are similarities between this methodology and he one used by Gonçalves et al (2016), which suggest that subsoil quality assessments should consider the depth, groove shape and distances between rows, determining the depth using a graduated iron rod and a template.…”

Section: Soil Preparationmentioning

confidence: 99%

Quality Control of Silvicultural Operations in Eucalyptus Plantation

et al. 2020

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“…In commercial eucalyptus plantations on the coast of Bahia, subsoiling is commonly carried out to a depth of 1.1 m (Stape et al 2002). This practice improves soil penetration and facilitates the growth of tree roots, which are able to explore larger volumes of soil and to absorb greater amounts of water and nutrients (Gonçalves et al 2016). Studies have indicated the effectiveness of deep subsoiling in commercial eucalyptus plantations on cohesive soils in the region of Entre Rios, Bahia, with greater initial growth of seedlings compared to the use of holes for planting (Stape et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Retention of eucalyptus harvest residues reduces soil compaction caused by deep subsoiling

et al. 2021

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Eucalyptus harvesting, forwarding and soil tillage operations are among the main causes for compaction of forest soils, with potential impacts on productivity. This concern is especially important in areas with soils that are naturally compacted (fragipans and duripans). In these soils, tillage operations include the use of subsoilers that can reach depths of more than one meter and require heavy tractors that exert high pressure on the soil. One of the ways to try to minimize the effect of this compaction is by retaining harvest residues. The objective of this study was to evaluate the impacts of eucalyptus harvesting on soil physical attributes, as well as to determine the potential of different types of residue management to reduce compaction from the soil tillage operation. Two experiments were conducted in the same area with a Yellow Argisol. In the first experiment, compaction caused by mechanized harvesting with harvester + forwarder was evaluated. In the second experiment, different managements of harvest residues were examined as potential modifiers of soil compaction during tillage for new plantings. For this, three managements systems were tested: (1) retention of all harvest residues and litter from the previous rotation (HR + L), (2) retention of litter from the previous rotation (L), and (3) removal of harvest residues and litter from the previous rotation (WR). Before and after harvest, sampling was carried out in the planting rows and inter-rows, and after tillage, samples were collected in the traffic line of the subsoiler-tractor set. In both experiments, undisturbed soil samples were collected from the center of the 0–10, 10–20, 20–40, 40–60, and 60–100 cm layers to determine soil density and total porosity. In each period and site of evaluation, mechanical resistance to penetration up to the 60-cm depth was also determined. The harvesting operation increased soil density at 0–10 and 60–100 cm depths only in the inter-rows. Retention of harvest residues and litter (HR + L) after harvesting avoided increases in soil density and penetration resistance caused by machine traffic during tillage. The results indicate the importance of retaining harvest residues on forest soils for achieving sustainable utilization and for conserving soil quality.

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Efeito Da Profundidade De Trabalho Na Qualidade Da Operação De Subsolagem Para Implantação Florestal1

Cited by 6 publications

References 7 publications

Sugarcane Root Development and Yield under Different Soil Tillage Practices

Sugarcane Root Development and Yield under Different Soil Tillage Practices

Quality Control of Silvicultural Operations in Eucalyptus Plantation

Retention of eucalyptus harvest residues reduces soil compaction caused by deep subsoiling

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