http://repositorio.ufc.br/handle/riufc/105 2026-06-03T05:32:37Z 2026-06-03T05:32:37Z Baretta, Dilmar Bartz, Marie Luise Carolina Fachini, Ivandro Anselmi, Rafael Zortéa, Talyta Baretta, Carolina Riviera Duarte Maluche http://repositorio.ufc.br/handle/riufc/14985 2018-12-28T18:34:46Z 2014-01-01T00:00:00Z

Título: Fauna edáfica e sua relação com variáveis ambientais em sistemas de manejo do solo Autor(es): Baretta, Dilmar; Bartz, Marie Luise Carolina; Fachini, Ivandro; Anselmi, Rafael; Zortéa, Talyta; Baretta, Carolina Riviera Duarte Maluche Abstract: The present study aims to generate knowledge about the soil fauna, its relation to other explanatory environmental variables, and, besides it, to select edaphic indicators that more contribute to separate the land use systems (LUS). Five different LUS were chosen: conventional tillage with crop rotation (CTCR); no-tillage with crop rotation (NTCR); conventional tillage with crop succession (CTCS); no-tillage with crop succession (NTCS) and minimum tillage with crop succession (MTCS). The samples were made in the counties Chapecó, Xanxerê and Ouro Verde located in the state of Santa Catarina, Brazil, and were considered the true replicates of the LUS. In each site, nine points were sampled in a sampling grid of 3 x 3. At the same points, soil was sampled for the physical, chemical and biological attributes (environmental variables). Pitfall traps were used to evaluate the soil fauna. Data were analyzed using principal component analysis (PCA) and canonical discriminant analysis (CDA). The soil fauna presented potential to be used as indictors of soil quality, since some groups proved to be sensible to changes of the environmental variables and to soil management and tillage. The soil management using crop rotation (NTCR and CTCR) presented higher diversity, compared to the systems using crop succession (NTCS, MTCS and NTCS), evidencing the importance of the soil tillage, independent of the season (summer or winter). The variable that better contributed to explain these changes were the chemical variables (potassium, pH, calcium, organic matter, available phosphorus, potential acidity), and biological variables (Shannon diversity index, Collembola, Pielou equitability index and microbial biomass carbon), respectively Tipo: Artigo de Periódico

2014-01-01T00:00:00Z Babujia, Letícia Carlos Silva, Adriana Pereira Nogueira, Marco Antonio Hungria, Mariangela http://repositorio.ufc.br/handle/riufc/14984 2022-08-04T18:29:03Z 2014-01-01T00:00:00Z

Título: Diversidade microbiana em um Latossolo Vermelho sob plantio direto e convencional no sul do Brasil Autor(es): Babujia, Letícia Carlos; Silva, Adriana Pereira; Nogueira, Marco Antonio; Hungria, Mariangela Abstract: The no-tillage (NT) system of soil management is recognized as more sustainable than conventional tillage (CT), with an important role played by soil microorganisms. The objective of this study was to estimate differences in soil microbial diversity under NT and CT at different soil depths. For that, bacterial (16S rDNA) and fungal (18S rDNA) communities were evaluated by denaturing gradient gel electrophoresis (DGGE) in a 20-year field experiment established on an Oxisol in southern Brazil on which soybean has been grown in the summer and wheat in the winter. Soil samples were collected at the depths of 0-5, 5-10, 10-20 and 20-30 cm, and submitted to DGGE analyses. The results revealed lower similarity (28%) between bacterial communities in the NT and the CT systems at the 0-5 cm layer. The Shannon index (H) confirmed higher bacterial diversity with NT at all depths, when compared to CT. In relation to fungal communities, higher diversity was detected with CT, especially at the 0–5-cm depth. The results indicate that fungal communities can be more tolerant to environmental stresses related to soil disturbance than bacteria. More emphasis should be given for understanding processes affecting the diversity of microorganisms in agricultural soils, with particular emphasis on tillage systems. Tipo: Artigo de Periódico

2014-01-01T00:00:00Z Galetto, Shivelly Los Fonseca, Adriel Ferreira da Harkatin, Silvano Reifur, Hendrik Ivan Carvalho, Igor Quirrenbach de http://repositorio.ufc.br/handle/riufc/14921 2022-08-04T18:29:07Z 2014-01-01T00:00:00Z

Título: Rendimento de grãos e forragens devido ao uso de fosfatos em sistema integrado de produção Autor(es): Galetto, Shivelly Los; Fonseca, Adriel Ferreira da; Harkatin, Silvano; Reifur, Hendrik Ivan; Carvalho, Igor Quirrenbach de Abstract: The aim of this study was to assess the effects of the sources and levels of surface-applied (broadcast) phosphorus (P) when sowing the winter annual forages on phosphorus accumulation and yields of maize, soybean, black oat and annual ryegrass crops in a crop-livestock integration system over three years. The experiment was established in April 2009, in the municipality of Castro, Parana, Brazil. The treatments consisted of the broadcast application when sowing the winter forages of four doses (0, 60, 120 and 180 kg ha-1 year-1) of total P2O5 as triple superphosphate (TSP), rock phosphate (RP-Arad) and magnesium termophosphate (MTP). The dry matter yields of black oat (2009 and 2011), annual ryegrass (2010), maize (2009/10 and 2011/12) and soybean (2010/11) and the accumulation of P in these crops were assessed. TSP provided the highest yield of total dry matter (TDM) and P accumulation only for black oat in the first year of cultivation. In the second year, MTP resulted in higher P accumulation than occurred with the other P sources in annual ryegrass and soybean, and both MTP and TSP provided higher P accumulation and grain export. In the third year, MTP provided a higher TDM yield and P accumulation for both the black oat and maize crops, resulting in the greatest residual effect over time. Tipo: Artigo de Periódico

2014-01-01T00:00:00Z Andreolla, Veruschka Rocha Medeiros Moraes, Aníbal de Bonini, Andreia Kusumota Deiss, Leonardo Sandini, Itacir Eloi http://repositorio.ufc.br/handle/riufc/14857 2022-08-04T18:29:01Z 2014-01-01T00:00:00Z

Título: Atributos físicos do solo em sistema integrado de feijão e ovinos submetido a doses de nitrogênio Autor(es): Andreolla, Veruschka Rocha Medeiros; Moraes, Aníbal de; Bonini, Andreia Kusumota; Deiss, Leonardo; Sandini, Itacir Eloi Abstract: Integrated crop-livestock systems (ICLS) can promote higher grain and meat/milk yield as well as reduce soil degradation risks. Thus, this study aimed to evaluate the influence of grazing sheep with moderate intensity and nitrogen doses on soil physical attributes, and bean crop yield (Phaseolus vulgaris Lam.) under rotation with summer corn crop (Zea mays Lam.) and winter pasture with oats (Avena sativa Lam) and ryegrass (Lolium multiflorum Lam.) The experimental design was completely randomized blocks with split-plot; the plots were nitrogen doses and the splitplots were grazing presence or absence. The treatments were nitrogen doses of 0, 75, 150 and 225 kg ha-1 applied on ryegrass and white oat pasture in winter followed by bean crop. Soil density, macroporosity, microporosity and total porosity and bean grain yield were evaluated. When ICLS are managed under no-tillage with moderate grazing, sheep trampling did not affect negatively soil physical attributes, which did not reach critical levels for subsequent growth and development of the bean crop. The black bean yield in summer was not affected by antecedent presence of sheep grazing in winter Tipo: Artigo de Periódico

2014-01-01T00:00:00Z