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| Registros recuperados: 48 | |
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| REATTO, A.; BROSSARD, M.; CARVALHO, A. M. de; MARTINS, E de S.; SILVA, A. V. da. |
| RESUMO: O estudo do comportamento radicular facilita a compreensão da parte aérea da planta e do manejo do solo. O trabalho objetivou avaliar a concentração radicular através do programa Ambiente para visualização de Imagens (ENVI), em perfis culturais sob diferentes sistemas de manejo, na Embrapa Cerrados, Planaltina - DF. O experimento foi constituído de uma rotação de milho e espécies condicionadoras de solo em manejos diferenciados (plantio direto e convencional, com incorporação de espécies). Foram realizadas análises de imagens de raízes nas profundidades 0 - 25 cm e 25 - 50 cm coletados em vídeo, convertidas em modo digital e processadas em ENVI por semelhança de pixels; quantificadas e os resultados representados em tabelas e gráficos. Avaliação... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Planta condicionadora; ENVI; Zero tillage; Cover plants; Direct drilling.; Cerrado; Manejo do Solo; Planta de Cobertura; Plantio Direto; Raiz; Sistema Radicular.; Soil management.; Root systems; Roots. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569005 |
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| MENDES, F. F.; NEGRI, B. F.; SOUSA, S. M. de; GUIMARAES, L. J. M.; PARENTONI, S. N.; MAGALHAES, J. V. de; GUIMARAES, C. T.. |
| Os solos tropicais se caracterizam pelos baixos teores de fósforo (P) na forma disponível para as plantas. Nesse sentido, a busca por cultivares mais eficientes na aquisição do P do solo e na utilização interna desse nutriente é uma alternativa para aumentar a produtividade do milho, reduzindo a necessidade de uso de fertilizantes fosfatados. A alteração na morfologia radicular é um dos mecanismos que está relacionado com o aumento da eficiência de aquisição de P pelas plantas. Neste contexto, os objetivos deste trabalho foram caracterizar uma população de testcrosses e obter correlações entre características radiculares e os índices de eficiência no uso de P. Para tanto, uma população de linhagens endogâmicas recombinantes (RILs) cruzada com um testador... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Zea mays; Fósforo; Raiz; Phosphorus; Roots. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/977090 |
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| Cacas, Jean-luc; Bure, Corinne; Furt, Fabienne; Maalouf, Jean-paul; Badoc, Alain; Cluzet, Stéphanie; Schmitter, Jean-marie; Antajan, Elvire; Mongrand, Sébastien. |
| Although Glycosyl-Inositol-Phospho-Ceramides (GIPCs) are the main sphingolipids of plant tissues, they remain poorly characterized in term of structures. This lack of information, notably with regard to polar heads, currently hampers the understanding of GIPC functions in biological systems. This situation prompted us to undertake a large scale-analysis of plant GIPCs: 23 plant species chosen in various phylogenetic groups were surveyed for their total GIPC content. GIPCs were extracted and their polar heads were characterized by negative ion MALDI and ESI mass spectrometry. Our data shed light on an unexpected broad diversity of GIPC distributions within Plantae, and the occurrence of yet-unreported GIPC structures in green and red algae. In monocots,... |
| Tipo: Text |
Palavras-chave: Glycosphingolipid; Glycosyl-Inositol-Phospho-Ceramide; GIPC; Mass spectrometry; MALDI-TOF; Polar head; Roots; Photosynthetic tissues; Berries. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00166/27689/25884.pdf |
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| Rosolem,Ciro Antonio; Silva,Rosemeire Helena da; Esteves,José Antonio de Fátima. |
| Cotton (Gossypium hirsutum) is known to have a high requirement for K and to be very sensitive to low soil pH. Most of K reaches plant roots by diffusion in the soil. As K interacts with Ca and Mg, liming can interfere in K movement in the soil, affecting eventually the plant nutrition. The objective of this work was to study the effect of dolomitic lime and 0, 15, 30, 45 and 60 g kg-1 of K on the supply of K to cotton roots. Cotton plants were grown up to 40 days in 5 L pots containing a Dark Red Latosol (Typic Haplusthox) with 68% and 16% of sand and clay, respectively. There was an increase in dry matter yields and in K accumulation due to K fertilization. Root interception of soil K was also increased by K application, but was not affected by lime.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum; Mass; Diffusion; Liming materials; Roots; Growth; Plant nutrition. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000500012 |
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| Paixão Filho,Jorge L. da; Gabrielli,Giuliano; Coraucci Filho,Bruno; Tonetti,Adriano L.. |
| One option for the increasing production of sewage sludge (SS) is its agricultural use in crops with high nutritional demand, such as the rose. Therefore, the aim of this work was to study the application of SS from primary stabilization pond in roses of the variety 'Carola'. For the experiment, the roses were planted in 20 L recipients using increasing doses of sludge (T2 - 12 Mg ha-1, T3 - 24 Mg ha-1 and T4 - 36 Mg ha-1), mineral fertilizer (T5) and control treatment (T1, without N) in a randomized block design. The evaluated parameters were: roots dry mass, aerial dry mass, total biomass, leaflets area and nitrogen concentration in the leaf. The SS application resulted in better development of the rose, increasing the roots and the aerial biomasses, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; Roots; Leaf area; Agriculture; Facultative ponds. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000100011 |
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| Ros,Clovis Orlando Da; Matsuoka,Marcia; Silva,Rodrigo Ferreira da; Silva,Vanderlei Rodrigues da. |
| ABSTRACT The distribution of phosphorus (P) in the soil interferes with the availability of the nutrient and can affect plant growth. The aim of this study was to compare the growth and accumulation of P in maize, soybean and sunflower plants in vertical gradients of the nutrient in the soil, with and without water stress. The design was completely randomised with five replications, in a 3 x 2 factorial scheme: three soil depth gradients of P (decreasing, increasing and nil) and two conditions of soil water availability (with and with no water stress). The depth gradients of P were in decreasing doses of P2O5 (300, 200, 100 and 0 mg dm-3), increasing doses (0, 100, 200 and 300 mg dm-3) and equal doses (150 mg dm-3) applied to the intermediate layers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil water; Roots; Dry weight; Nutrient accumulation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300419 |
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| Ramírez Pisco,Ramiro; Gómez Yarce,Juan Pablo; Guáqueta Restrepo,Juan José; Gaviria Palacio,Daniel. |
| Abstract Gold phytoextraction is a technology used to obtain this metal (Au) throughout plants. Some of the benefits of this technology are the mitigation of the environmental impact, the fact that it does not imply the constant use of pollutants, and has the ability to promote soil reclamation. The aim of this research was to determine if Brachiaria decumbens has the potential to improve soil physical properties while had achieved a gold extraction. For this purpose, Helianthus annuus and Brachiaria decumbens, were used in a completely randomized design with four replicates. To induce gold uptake, ammonium thiocyanate was applied to plants. The statistical analysis was performed using the R-Studio software. Finally, it became evident that B. decumbens is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Absorption; Aggregates; Transpiration; Roots. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400574 |
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| Registros recuperados: 48 | |
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