Avaliação dos atributos do solo sob diferentes usos na região de Humaitá, Amazonas

Campos, Milton César Costa; Mantovanelli, Bruno Campos; Silva, Diogo André Pinheiro; Santos, Luis Antonio Coutrin; Gomes, Romário Pimenta; Soares, Marcelo Dayron Rodrigues; Franciscon, Uilson

doi:10.4322/rca.1822

Cited by 37 publications

(38 citation statements)

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“…14 n. 5, e2342 -Taubaté 2019 (634 g kg -1 ) > vegetable (633 g kg -1 ) > AS > cassava (597 g kg -1 ) at 0.0-0.10 m. Similarly, it occurred in the 0.10-0.20 m depth only for forest (674 g kg -1 ), grassland (651 g kg -1 ) and cassava (540 g kg -1 ). These results are similar to other investigations carried out on soils under different uses in the Humaitá, AM region (Oliveira et al, 2013;Mantovanelli et al, 2015;Soares et al, 2016).…”

Section: Resultssupporting

confidence: 92%

Multivariate analysis in the evaluation of soil attributes in areas under different uses in the region of Humaitá, AM

et al. 2019

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The recognition of the influence of management practices on soil physical and chemical conditions is substantial for sustainable agriculture. For this reason, this study was developed for the purpose of evaluating the behavior of soil attributes under different uses in the region of Humaitá, AM, using multivariate statistical methods. The study was developed in 8 rural properties producing bananas, grassland, maize, coffee, cassava, vegetables, agroforestry system and a forest fragment. Samples of soils with preserved structure in the 0.0 - 0.10 and 0.10 - 0.20 m layers were randomly collected in 5 small trenches per area, totaling 32 samples in the management systems, to determine the physical and chemical attributes. The data were then submitted to univariate and multivariate statistical analysis. Exploratory data analysis (principal components and dendrogram) and frequency of environmental covariates was efficient in distinguishing production environments, so multivariate classification based on physical and chemical attributes of the soil can help in the proper planning of land use. The analysis of the principal components indicates that the BD presents direct dependence with the SPR, signaling the use of the soil with grassland the only one in the process of compaction. Soil acidity is the main limiting factor for crop development, requiring the adoption of pH corrective practices with improvements in nutrient supply. The conversion of the forest to grassland maintained the structural characteristics of the soil, while the other uses increased improvements in physical quality and soil fertility.

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Section: Resultssupporting

confidence: 92%

Multivariate analysis in the evaluation of soil attributes in areas under different uses in the region of Humaitá, AM

et al. 2019

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“…Segundo Mantovanelli et al (2015), os altos teores de alumínio trocável está relacionado ao efeito do baixo aporte e produção de compostos orgânicos, nos diferentes ambientes estudados pelo mesmo, que por sua vez, pode gerar baixa capacidade de complexação desse elemento proporcionando assim teores elevados nas áreas, assim como observado no presente estudo em ambas as áreas.…”

Section: Resultados E Discussõesunclassified

Tópicos em Ciências Agrárias, Volume 1

Poisson¹

2019

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“…Multivariate statistical techniques were used in this study since they are pointed out as an important tool in the study of soil physical quality indicators (Oliveira et al, 2015), soil management analysis (Mantovanelli et al, 2015;Soares et al, 2016), and crop productivity as a function of soil physical quality (Obour et al, 2018). In fact, they are efficient in distinguishing conventional management with and without additional compaction, demonstrating the simultaneous effect of mechanized tillage on soil physical attributes (Figures 2 and 3).…”

Section: Discussionmentioning

confidence: 99%

Changes in the physical properties of an Amazonian Inceptisol induced by tractor traffic

Gomes

Bergamin

Silva

et al. 2019

Chil. j. agric. res.

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With agricultural expansion in Amazonian regions, studies are needed to verify the effect of mechanization on the soils of the regions. This study aimed to assess soil physical attributes under different compaction conditions induced by tractor traffic on a soil of southern Amazonas State, Brazil. Treatments consisted of three compaction levels: conventional soil tillage without additional compaction (CT) and conventional soil tillage with additional compaction with four (CTc4) and eight tractor passes (CTc8). An intense increase in soil aggregate diameter was observed in the superficial soil layer (0.00-0.05 m) from four tractor passes, decreasing in the successive soil layers (0.05-0.20 m). Soil density increased up to a depth of 0.10 m. The reduced macroporosity and soil moisture on the soil surface (0.00-0.05 m) did not significantly alter soil microporosity in the different treatments. For the macroporosity, the 0.00-0.05 m layer was the most impaired, with a reduction of more than 50% for the treatments submitted to compaction (CTc4 and CTc8). The penetration resistance for the 0.00-0.05 m layer was increased by more than 150% between the treatment without compaction (CT = 0.88 MPa) and compaction (CTc4 = 2.25 MPa; CTc8 = 2.50 MPa). These results show a greater caution in the agricultural machinery management in Amazonian soils, which may be aggravated due to the intense water regime in the region.

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Avaliação dos atributos do solo sob diferentes usos na região de Humaitá, Amazonas

Cited by 37 publications

References 0 publications

Multivariate analysis in the evaluation of soil attributes in areas under different uses in the region of Humaitá, AM

Multivariate analysis in the evaluation of soil attributes in areas under different uses in the region of Humaitá, AM

Tópicos em Ciências Agrárias, Volume 1

Changes in the physical properties of an Amazonian Inceptisol induced by tractor traffic

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