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| Registros recuperados: 288 | |
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| SANTOS,Fernando André Silva; PIERANGELI,Maria Aparecida Pereira; SILVA,Fernando Luiz; SERAFIM,Milson Evaldo; SOUZA,Célia Alves de. |
| Fields of murundus (FM) are wetlands that provide numerous ecosystem services. The objectives of this study were to evaluate the chemical [organic carbon (OC), P, K+, Ca2+, Mg2+, Al3+ and H+Al] and physical [texture and bulk density (Bd)] soil attributes and calculate the organic matter (OM) and nutrient stock (P, Ca, Mg, and K) in soils of FM located in the Guapore River basin in Mato Grosso. Thirty-six sampling points were selected, and soil samples were collected from two environments: the murundu and plain area surrounding (PAS). At each sampling point, mini trenches of 0.5 × 0.5 × 0.4 m were opened and disturbed and undisturbed soil samples were collected at depths of 0-0.1, 0.1-0.2, and 0.2-0.4 m. In the Principal Component Analysis the variables... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Basin; Earthmound; Soil fertility; Wetland. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200101 |
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| Assunção,Vivian Almeida; Silva,Danilo Muniz da; Dalponti,Guilherme; Sartori,Ângela Lúcia Bagnatori; Casagrande,José Carlos; Mansano,Vidal de Freitas. |
| ABSTRACT We characterized taxonomic and functional differences between two vegetation physiognomies in the Brazilian Chaco, namely chaco woodland (CW) and chaco forest (CF), in order to understand which abiotic and biotic mechanisms underlie the establishment of different physiognomies. We characterized the vegetation physiognomies by comparing woody species composition, richness and diversity and functional diversity between CW and CF plots. We also measured soil variables to characterize abiotic factors related to the different physiognomies. Species richness and diversity and soil nutrient values were higher in CF. Leaf succulence and nitrogen content were higher in CW, while height, leaf area, and specific leaf area were higher in CF. The standardized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Functional traits; Seasonally dry forests; Plant community; Physiognomy; Soil fertility. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400746 |
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| Silva Neto, Eduardo Carvalho da; Pereira, Marcos Gervasio; Frade Júnior, Elizio Ferreira; Silva, Sandra Bezerra da; Carvalho Júnior, João Andrade; Santos, José Carlos dos. |
| In Amazonia, the main causes of deforestation are systems based on slash-and-burn agriculture. The objective of this work was to evaluate temporal changes in the soil chemical attributes after the vegetation has been slashed and burned in an area of native forest in the Western Amazon. For this study, four hectares of forest in Cruzeiro do Sul, State of Acre, Brazil, was slashed and burned. The soil in the study area was classified as Ultisol (Argissolo Amarelo Distrófico típico). Soil samples were collected over the course of one year, the first one being collected 16 hours after the burn and the others at 30, 60, 90, 150, 210, 270, and 360 days after the burn. The soil surface layers were more sensitive to fire action. Ashes from vegetation burn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian agroecosystem; Soil fertility; Cycling of nutrients; Soil management; Brasil.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42609 |
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| Chiba, Marcio Koiti; IAC; Mattiazzo, Maria Emília; Biossolo S/C; Oliveira, Fernando Carvalho; Biossolo S/C. |
| O fornecimento de fósforo pelo lodo de esgoto (LE) para as culturas ainda não é um fenômeno bem conhecido. Com o objetivo de quantificar a resposta da cana-de-açúcar, variedade SP83-2847, à substituição da adubação fosfatada mineral pela aplicação de lodo de esgoto, foi instalado um experimento em um Argissolo Vermelho-Amarelo em Capivari, Estado de São Paulo. Os tratamentos, dispostos em blocos casualizados, com quatro repetições, constaram de: 1 - controle; 2 - Fertilização mineral (FM); 3 - LE+0P; 4 - LE+45P; 5 - LE+90P; 6 - LE+135P e 7 - LE+180P. A dose de LE, 8,2 t ha-1 (base seca), foi suficiente para fornecer 60 kg ha-1 de N, e as doses de P foram iguais a 0, 45, 90, 135 e 180 kg ha-1de P2O5. Não houve efeito dos tratamentos nos valores de pH,... |
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Palavras-chave: 5.01.00.00-9 Agronomia biossólido; Fertilidade do solo; Produção de colmos Ciência do Solo biosolid; Soil fertility; Stalk production. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/692 |
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| Ferrari, Samuel; Furlani Júnior, Enes; Godoy, Leandro José Grava de; Ferrari, João Vitor; Souza, Wilson José Oliveira de; Alves, Elza. |
| Fertilizer use in no-till systems must be aligned with a correct interpretation of soil chemical attributes and crop demands. The objectives of this work were evaluate the effects of pre-sowing application of ammonium sulfate (AS) and of cover crops on the yields and soil chemical attributes of no-till cotton (Gossypium hirsutum L. r. latifolium Hutch) over two harvesting years. The experiment was arranged in randomized complete block design, with the plots in strips, and the variables were three cover crops (Raphanus sativus L., Avena strigosa L. and Avena sativa L.) and four AS doses (0, 150, 300, and 450 kg ha-1) applied over millet dry biomass. The cotton in the experimental plots was manually harvested on April 25, 2007 and April 24, 2008. The soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.03.00-8 Gossypium hirsutum; Fertilizer management; Soil fertility; No-till Fitotecnia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17972 |
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| Araújo, Ademir Sérgio Ferreira de; Lima, Luciano Moura; Melo, Wanderley José de; Santos, Vilma Maria dos; Araujo, Fabio Fernando de. |
| This study evaluated soil properties and cowpea yield after six years of consecutive amendment of composted tannery sludge. The compost was applied annually at 0, 2.5, 5, 10, and 20 Mg ha-1 and at the end of the sixth year, the chemical and physical properties of the soil were evaluated using a randomized block design. The Cr, P, K, Ca, Na and organic C contents and the pH and cation exchange capacity increased linearly after six years of compost amendment. The soil bulk density decreased linearly while the aggregate stability index increased after compost amendment. As a consequence of the changes in the chemical and physical properties of the soil, cowpea yield showed a quadratic response to the tannery rates, with an estimated maximum cowpea yield at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waste management; Soil fertility; Soil quality Ciencia do Solo. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28281 |
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| Silva Neto, Eduardo Carvalho da; Pereira, Marcos Gervasio; Frade Júnior, Elizio Ferreira; Silva, Sandra Bezerra da; Carvalho Júnior, João Andrade; Santos, José Carlos dos. |
| In Amazonia, the main causes of deforestation are systems based on slash-and-burn agriculture. The objective of this work was to evaluate temporal changes in the soil chemical attributes after the vegetation has been slashed and burned in an area of native forest in the Western Amazon. For this study, four hectares of forest in Cruzeiro do Sul, State of Acre, Brazil, was slashed and burned. The soil in the study area was classified as Ultisol (Argissolo Amarelo Distrófico típico). Soil samples were collected over the course of one year, the first one being collected 16 hours after the burn and the others at 30, 60, 90, 150, 210, 270, and 360 days after the burn. The soil surface layers were more sensitive to fire action. Ashes from vegetation burn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian agroecosystem; Soil fertility; Cycling of nutrients; Soil management; Brasil.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42609 |
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| Freitas, Welington Kiffer de; Portz, Adriano; Peres, Afonso Aurélio de Carvalho; Tarré, Ricardo Martinez; Campos, Matheus de Melo. |
| This study aimed to evaluate soil fertility and the horizontal structure of three demonstration units of Agroforestry Systems (ASs), Sapucaia, RJ, Brazil. Twenty-four plots (25 m2) were delineated in each AS. Soil fertility was evaluated through pH, organic carbon, total nitrogen, phosphorus and potassium. The estimated phytosociological parameters were frequency, density, dominance, importance value and the diversity index of Shannon. Magnesium was more pronounced in ASas with more management intensity due to the incorporation of banana biomass (AS 1 and 2). The AS 1 highlights were for banana and coffee (about 45% IV), AS 2 banana and physic nuts (about 50% IV) and AS 3 cassava and ‘fumo-bravo’ (VI=52.2%). This study suggests that diversity contributes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.03.00.00-0 vegetation horizontal structure; Soil fertility; Family farming. Ecologia. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/35368 |
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| Marques,Márcia S.; Sá,Nadja M.; Scotti,María R.. |
| Leguminous trees are being planted in order to establish restoration units in the Brazilian Atlantic forest ecosystem. The success of the establishment depends on the growth, productivity of plants and litter decomposition rates. The objective of this study was to investigate the decomposition of araribá (Centrolobium tomentosum Guill. Ex Benth) leaves, at two sites. Site 1 was an experimental plantation of the native species C. tomentosum, which was inoculated with rhizobia plus mycorrhizal fungi, and Site 2 was a eucalyptus (Eucalyptus grandis W. Hill ex Maiden) forest. The leaf litter of C. tomentosum was incubated for 120, 240 and 360 days in both sites. The decomposition rate and dynamic of mineralization of the organic matter and the nutrients K, Mg,... |
| Tipo: Journal article |
Palavras-chave: Decomposition; Eucalyptus sp.; Microbial colonization; Tropical forest; Soil fertility. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072003000100008 |
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| BARBOSA,JULIERME Z.; MOTTA,ANTONIO C. V.; CONSALTER,RANGEL; POGGERE,GIOVANA C.; SANTIN,DELMAR; WENDLING,IVAR. |
| ABSTRACT Native to subtropical region of South America, yerba mate is responsive to P under some conditions, but the degree of influence of genetic and soil on the growth and composition of the leaf is unknown. The aim of study was to evaluate plant growth, nutrients and potentially toxic elements in leaves of yerba mate clones in response to P application in acid soils. In greenhouse condition, two yerba mate clone seedlings were grown (210 days) in pots, each clone in a completely randomized design in factorial scheme (with and without P; four acid soils). The elemental composition of leaves and the growth of plants were determined. Phosphorus promoted plant growth, but this was not accompanied by increased P in leaf tissue in all conditions tested. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ilex paraguariensis St.Hil; Medicinal plant; Metal accumulation; Soil fertility; Trace elements.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100557 |
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| NERI,ANDREZA V.; SCHAEFER,CARLOS E.G.R.; SOUZA,AGOSTINHO L.; FERREIRA-JUNIOR,WALNIR G.; MEIRA-NETO,JOÃO A.A.. |
| This study was carried out in Paraopeba National Reserve. It aims to classify and evaluate the soil of the studied area and to verify the influence of soil attributes on vegetation by testing the following hypotheses: 1) under woodland physiognomies (Cerradão) the soil fertility is higher and the Al content lower; 2) open savanna occurs only in areas with high Al contents. For this purpose, representative soils in the Paraopeba National Reserve were mapped, identified, and samples from five profiles were analyzed. The environmental gradient was easily observed by principal components analyses, where the differences between the sites were highlighted. The Spearman correlation was used to verify the hypothesis. The correlation between vegetation (basal area,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aluminum tolerance; Brazilian savanna; Edaphic features; Soil fertility; Soil-vegetation gradient. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100087 |
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| CARVALHO,LAÉRCIO A. DE; MEURER,ISMAEL; JUNIOR,CARLOS A. DA SILVA; SANTOS,CRISTIANE F.B.; LIBARDI,PAULO L.. |
| When deposited on land the vinasse can promote improvement in fertility, however, often fertilizer application occurs in areas considered homogeneous, without taking into account the variability of the soil. The objective of this study was to evaluate the effect of vinasse application on potassium content in two classes of soils cultivated with sugarcane, and characterize the spatial variability of soil using geostatistical techniques. In the 2010 and 2011 crop year, soil samples were collected from an experimental grid at 0-0.2 and 0.2-0.4 m depth in three soils cultivated with sugarcane, totaling 90 samplings in each grid, for the determination of pH, calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), aluminum (Al) and potential acidity (H +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geostatistics; Saccharum officinarum; Semivariogram; Soil fertility. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401999 |
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| Balota,Elcio Liborio; Chaves,Julio César Dias. |
| A field experiment was conducted for ten years in a sandy soil in the north part of the Paraná State, Brazil. The soil samples were collected at 0-10 cm depth, both under the coffee canopy and in the inter row space between the coffee plants, in the following treatments: Control, Leucaena leucocephala, Crotalaria spectabilis, Crotalaria breviflora, Mucuna pruriens, Mucuna deeringiana, Arachis hypogaea and Vigna unguiculata. The legume crops influenced the microbial activity, both under the coffee canopy and in the inter row space. The cultivation of Leucaena leucocephala increased the microbial biomass C, N and P. Although L. leucocephala and Arachis hypogaea provided higher microbial biomass, the qCO2 decreased by up to 50% under the coffee canopy and by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial biomass; Mulching; Green manure; Soil fertility. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100005 |
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| Registros recuperados: 288 | |
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