|
|
|
| Registros recuperados: 91 | |
|
|
| Carvalho,L.B.; Bianco,M.S.; Bianco,S.. |
| The experiment was carried out aiming to analyze the dry mass production and distribution and the content and accumulation of macronutrients in sourgrass (Digitaria insularis) plants cultivated under mineral nutrition standard conditions. Plants grew in 7-liter pots filled with sand substrate and daily irrigated with nutrient solution, being maintained under greenhouse conditions. Treatments consisted of times of evaluation (21, 35, 49, 63, 77, 91, 105, 119, and 133 days after emergence - DAE) and were arranged in a completely randomized design with four replicates. Sourgrass showed small accumulation of dry mass (0.3 g per plant) and macronutrients (3.7 mg of N per plant, 0.4 mg of P per plant, 5.6 mg of K per plant, 0.9 mg of Ca per plant, 0.7 mg of Mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digitaria insularis; Plant growth; Mineral nutrition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400004 |
| |
|
| |
|
| |
|
|
| RINCÓN-ROSALES,REINER; RUÍZ-VALDIVIEZO,VÍCTOR M; MONTES-MOLINA,JOAQUÍN A; GUTIÉRREZ-MICELI,FEDERICO A; DENDOOVEN,LUC. |
| The tropical legume Acaciella angustissima inoculated with or without Sinorhizobium mexicanum ITTG R7T strain was cultivated in an aluminium (Al) spiked soil to study its tolerance towards this metal. Seedlings of A. angustissima were grown in soil with 0, 2, 4 or 6 mg Al kg-1. The effect of Al and inoculation on growth, nodulation, and nitrogen and tannins content in the plants was monitored. Height and total and dry root weight of plantlets decreased significantly when soil was spiked with Al, but increased when inoculated. Al decreased the number of nodules. Inoculum increased total N and tannin content of the plantlets. It was found that Al reduced the growth of the tropical leguminous N2-fixing shrub A. angustissima, while inoculation with S.... |
| Tipo: Journal article |
Palavras-chave: Aluminium tolerance; Plant growth; Nodulation; Nitrogen and tannins content; Sinorhizobium mexicanum ITTG R7T; Soil. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000200009 |
| |
|
|
| CORRÊA,F.F.; MADAIL,R.H.; BARBOSA,S.; PEREIRA,M.P.; CASTRO,E.M.; SORIANO,C.T.G.; PEREIRA,F.J.. |
| The objective of this work was to evaluate the effects of the population density of Typha angustifolia plants in the anatomical and physiological characteristics. Plants were collected from populations of high density (over 50% of colonization capacity) and low density (less than 50% of colonization capacity) and cultivated under controlled greenhouse conditions. Plants from both populations were grown in plastic trays containing 4 L of nutritive solution for 60 days. At the end of this period, the relative growth rate, leaf area ratio, net assimilatory rate, root/shoot ratio, leaf anatomy, root anatomy, and catalase and ascorbate peroxidase activities were evaluated. Plants from high density populations showed increased growth rate and root/shoot ratio.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrophytes; Typha angustifolia; Morphological plasticity; Plant growth; Ecological plant anatomy. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100001 |
| |
|
|
| Buentello Volante,B; Díaz de León-Sánchez,F; Rivera-Cabrera,F; Aguilar Caballero,R; Ponce-Valadez,M; Sánchez de Jiménez,E; Pérez-Flores,LJ. |
| Auxin and insulin promote Zea mays embryo growth, induce S6 ribosomal protein (S6rp) phosphorylation, and promote specific protein synthesis. The objective of this research was to test a possible cross-talk between insulin and auxin transduction pathways in Z. mays coleoptiles, typical auxin target tissues. Auxin and insulin produced differential quantitative and qualitative stimulation of cytoplasmic and ribosomal protein phosphorylation, and specific patterns of de novo synthesized cytoplasmic proteins. In addition, insulin induced S6rp phosphorylation was strongly inhibited by rapamycin, indicating target of rapamycin (TOR) kinase participation; auxin-induced S6rp phosphorylation was insensitive to this inhibitor. Phosphatidic acid (PA), a second... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Auxins; Insulin; Phosphatidic acid; ZmS6K; TOR; Plant growth. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000100015 |
| |
|
|
| FIGUEIREDO, E. O.. |
| Este estudo objetivou, por meio da curva média, avaliar o desempenho de modelos na classificação de sítio mais estável para as árvores dominantes de três povoamentos de Tectona grandis L.f., com idade entre 6 e 10 anos, na microrregião do Baixo Rio Acre, no Estado do Acre. Foram testados 15 modelos lineares e não-lineares, e avaliada a performance dos modelos pelas estatísticas: coeficiente de determinação (R2), média dos resíduos, erro padrão residual, erro percentual, gráfico de distribuição dos resíduos e estabilidade total de classificação das parcelas. A estabilidade da equação foi medida por meio do desvio padrão das classificações de sítio, nas diversas idades, para cada parcela. Todos os modelos testados apresentaram boas estatísticas de precisão,... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Teak; Sempre Verde; São Francisco I; São Francisco II; Rio Branco (AC); Acrelândia (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Análisis estadístico; Terreno agrícola.; Crecimiento de planta; Factores ambientales; Madera tropical; Essência florestal; Teca; Tectona grandis; Condição ambiental; Propriedade rural; População de planta; Fator de crescimento; Análise estatística; Flora.; Tropical wood; Environmental factors; Agricultural land; Plant growth; Statistical analysis.. |
| Ano: 2005 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/511251 |
| |
|
| |
|
| |
|
| |
|
|
| Maeda, Shizuo; Silva, Helton Damin da; Bellote, Antonio Francisco Jurado. |
| The application of cellulosic waste in forest plantations is an alternative to disposal, but more studies are necessary to confirm the safity of this disposal. The response of Pinus taeda L. to salinity in Humic Distrocryept was evaluated. In plantation, the seedlings were assessed for their height and stem diameter (SD), and at 120 days, were assessed the SD, height, dried root biomass (DRB), shoot (DBS) and total dried matter (TDM). The contents of P, K, Ca, Mg and Na were determinated, and, based on these levels it was estimated the quantity of these elements and calculated the efficiency use in leaves and roots and translocation to the shoot. Except the relationship between DSB/DRB, the other variables were significantly influenced by increased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electric conductivity; Plant growth; Nutritional efficiency. Condutividade elétrica; Crescimento vegetal; Eficiência de utilização.. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/110 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Oliveira,Mara Lucia Jacinto; Araujo,Ademir Sérgio Ferreira de; Melo,Wanderley José de. |
| Tannery sludge contains high concentrations of inorganic elements, such as chromium (Cr), which may lead to environmental pollution and affect human health The behavior of Cr in organic matter fractions and in the growth of cowpea (Vigna unguiculata L.) was studied in a sandy soil after four consecutive annual applications of composted tannery sludge (CTS). Over a four-year period, CTS was applied on permanent plots (2 × 5 m) and incorporated in the soil (0-20 cm) at the rates of 0, 2.5, 5.0, 10.0, and 20.0 Mg ha-1 (dry weight basis). These treatments were replicated four times in a randomized block design. In the fourth year, cowpea was planted and grown for 50 days, at which time we analyzed the Cr concentrations in the soil, in the fulvic acid, humic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil contamination; Humic substances; Solid residue; Heavy metals; Plant growth; Trace elements. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100297 |
| |
|
| |
|
| |
| Registros recuperados: 91 | |
|
|
|
