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| Registros recuperados: 26 | |
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| Seguel,Alex; Medina,Jorge; Rubio,Rosa; Cornejo,Pablo; Borie,Fernando. |
| Aluminum phytotoxicity in acid soils is an important environmental stress that negatively affects crop production, but arbuscular mycorrhizal (AM) fungi performance would allow plants to better withstand this environmental condition. This study aimed to analyze the effect of soil Al on early AM colonization of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) cultivars. Near-isogenic Crac, Invento, and Porfiado wheat cultivars and Sebastián and Aurora barley cultivars were sown in pots in an acid soil at three Al saturation levels (60, 34, and 11%). At 20 d after sowing (DAS) 'Crac' presented higher AM colonization (27%) than other cultivars. However, 'Invento' had the fastest colonization at 41 DAS, which was inhibited in short term at lower... |
| Tipo: Journal article |
Palavras-chave: Acid soils; Arbuscular mycorrhizal propagules; Cereal crop; Soil aluminum saturation. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300022 |
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| Dalpisol,Maristela; Serrat,Beatriz Monte; Motta,Antonio Carlos Vargas; Poggere,Giovana Clarice; Bittencourt,Simone; Barbosa,Julierme Zimmer. |
| ABSTRACT In Paraná, most of the sludge generated in sewage treatment plants is subjected to the prolonged alkaline stabilization process. Although it is known that the alkaline sewage sludge contains micronutrients such as Zn, Cu and Mn, little is known about the availability of these elements in soils treated with this type of sewage sludge. Thus, the objective of the study was to evaluate the influence of alkaline sewage sludge from Paraná on Zn, Cu and Mn availability in soils. Twenty sewage treatment plants were selected throughout Paraná, where alkaline sewage sludge and the most representative agricultural soil of the each region were collected. Each soil was incubated for 60 days with alkaline sewage sludge rates (0, 10, 20, 40, and 80 Mg ha-1) from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid soils; Organic residues; Recycling; Micronutrients.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100081 |
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| Maldaner,Joseila; Nicoloso,Fernando Teixeira; Tabaldi,Luciane Almeri; Cargnelutti,Denise; Skrebsky,Etiane Caldeira; Rauber,Renata; Gonçalves,Jamile Fabbrin; Rossato,Liana Verônica. |
| Aluminum (Al) toxicity is a limiting factor for crop production in acid soils, which cover approximately 60% of the Brazilian territory. This study aimed to evaluate the effects of Al on growth and tissue Al concentration of two Pfaffia glomerata accessions (BRA and JB/UFSM). Plantlets were grown in a hydroponic system with five Al concentrations (0, 50, 100, 150 and 200mg L-1) for 7 days. Most of the evaluated parameters presented significant interaction between both P. glomerata accessions and Al levels in nutrient solution and, in general, Al treatments negatively affected plant growth, especially roots. Moreover, BRA accession showed higher Al accumulation in its tissues than JB/UFSM and, consequently in BRA accession the growth was impaired... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Ginseng; Acid soils; Al toxicity.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000601013 |
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| Silva,Gerarda Beatriz Pinto da; Zanella,Camila Martini; Delatorre,Carla Andréa; Chaves,Márcia Soares; Martinelli,José Antônio; Federizzi,Luiz Carlos. |
| ABSTRACT: Aluminum (Al) toxicity in plants is seen in about 15% of the soils worldwide, restraining yields in arable land. In Brazil, acidic soils limit production of wheat (Triticum aestivum L.) and other cereals. Al is toxic for most winter cereals when its concentration increases and soil pH is below 5. One of the main concerns with acidic soil is the increase in the mobility of Al3+ions. Al binds to cell walls in roots, preventing meristematic elongation in sensitive species, causing damage to the root system and results in lower yields. Al3+ forms highly stable complexes with phosphorus (P), limiting its availability to plants, as well as reducing cell division and elongation. To deal with Al toxicity, plants have developed strategies such as organic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L. Al3+; Acid soils; ALMT1; MATE.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001000250 |
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| Ernani,Paulo Roberto; Barber,Stanley Arthur. |
| Concentration and identity of cations and anions in the soil solution may affect soil P reactions and thus P availability. The magnitude of these reactions was evaluated in this research after application of various salts to a highly weathered low pH soil. Chloride, nitrate, and sulfate salts of Na, NH4, K, Ca, Mg, Sr, or Cu were added to the soil after addition of 360mg P/kg trying to simulate ion concentrations around granules of fertilizers in the soil. Thirty days later, P was determined in the soil solution (Pli) and on the solid phase (Psi). The soil samples of some treatments were leached with water and three days later a new soil solution was displaced. Separate addition of all salts increased Pli, except NaCl at the lowest rate. The increase of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid soils; Phosphorus reactions; Ionic strength. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781995000200007 |
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| Pérez Velásquez,Juan C.; Souza Jr.,Cláudio Lopes de; Narro,Luis A.; Pandey,Shivaji; De León,Carlos. |
| Breeding programs for acid-soil tolerance are desirable as a relatively inexpensive and permanent way for increasing maize (Zea mays L.) yield on these soils. Our objective was to compare the genetic effects controlling the expression of maize traits in acid and non-acid soils. Seven related and one unrelated inbred lines, with different levels of tolerance to acid soil, and their F1, F2, BC1, and BC2 generations were evaluated in four acid and two non-acid soils. Estimates of additive, dominance, and epistatic effects were computed for grain yield, plant height, days to mid-silk, and prolificacy, using the generation means analysis procedure. For all traits the major part of the variation was accounted for by additive and dominance effects, with dominance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid soils; Additive; Dominant; Epistatic effects; Generation analysis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100017 |
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| FERREIRA, A. C. de B.; BORIN, A. L. D. C.; LAMAS, F. M.; FERREIRA, G. B.; RESENDE, A. V. de. |
| O Cerrado brasileiro, em geral, são naturalmente ácidos e intemperizados, apresentando níveis tóxicos de alumínio (Al3+), baixos níveis de saturação por bases trocáveis, baixa capacidade de troca de cátions (CTC) e reduzidos teores de matéria orgânica, além de reduzida disponibilidade de nutrientes, com exceção de ferro e manganês (Lopes; Guilherme, 2016). Não obstante essas características, são solos profundos, com condições favoráveis à mecanização e respondem às correções químicas, viabilizando a produção agrícola rentável. A região do Cerrado contribui em grande proporção para a produção nacional de soja, de milho e de quase todo algodão (98%) produzido no País (Conab, 2021). Mas, para que isso acontecesse, os solos precisaram ser corrigidos... |
| Tipo: Folhetos |
Palavras-chave: Algodão; Milho; Soja; Cerrado; Nutrição Vegetal; Acidez do Solo; Produção Agrícola; Fibra; Manejo do Solo; Latossolo; Cotton; Soybean products; Corn meal; Vegetable products; Plant nutrition; Fiber quality; Acid soils; Soil management. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1146572 |
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| Meriño-Gergichevich,C; Alberdi,M; Ivanov,A.G; Reyes-Diaz,M. |
| High aluminum (Al) concentrations as Al3+ represent an important growth and yield limiting factor for crops in acid soils (pH ≤5.5). The most recognized effect of Al-toxicity in plants is observed in roots. However, damages in the upper parts (including stem, leaves and fruits) may also be present. In addition, Al-toxicity triggers an increase in reactive oxygen species (ROS), causing oxidative stress that can damage the roots and chloroplasts, decreasing normal functioning of photo synthetic parameters. Al-toxicity may also increase or inhibit antioxidant activities, which are responsible to scavenge ROS. As result of the negative effects of toxic Al, root metabolic processes, such as water and nutrient absorption, are disturbed with a... |
| Tipo: Journal article |
Palavras-chave: Acid soils; Aluminum; Amendments; Calcium; Gypsum. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100003 |
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| Registros recuperados: 26 | |
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