Buscar
Mostrando ítems 31-40 de 209
Qualidade de mudas clonais de Eucalyptus urophylla x E. grandis em função do substrato
(Universidade Federal da Paraíba (UFPB) Ccsa, 2012-01-01)
Considering the increasing demand for seedlings of plants for aforestation and the scarcity of raw materials for the substrates used for plant growth, it is necessary to evaluate new components and formulations that ensure ...
Brachiaria species influence nitrate transport in soil by modifying soil structure with their root system
(Nature Publishing Group, 2020-03-19)
Leaching of nitrate from fertilisers diminishes nitrogen use efficiency (the portion of nitrogen used by a plant) and is a major source of agricultural pollution. To improve nitrogen capture, grasses such as brachiaria are ...
Decomposition of Eucalyptus grandis and Acacia mangium leaves and fine roots in tropical conditions did not meet the Home Field Advantage hypothesis
(2016-01-01)
Unlike Eucalyptus monocultures, nitrogen fixing trees are likely to improve the soil nutrient status through the decomposition of N-enriched litter. The Home Field Advantage (HFA) hypothesis states that plants can create ...
Functional specialization of Eucalyptus fine roots: contrasting potential uptake rates for nitrogen, potassium and calcium tracers at varying soil depths
(WILEY-BLACKWELL, 2011)
1. Little is known about the role of deep roots in the nutrition of forest trees and their ability to provide a safety-net service taking up nutrients leached from the topsoil. 2. To address this issue, we studied the ...
Ultrastructure of early mineral deposition during hyaline layer formation in rat molars
(Elsevier B.V., 2001-04-01)
There is no consensus on whether the first mineralized layer, the hyaline layer, that is juxtaposed to root dentine is a variety of dentine or cementum or even a tissue of epithelial origin. Some suggest that there is no ...
Quality of Eucalyptus urophylla x E. grandis cuttings as a function of substrateQualidade de mudas clonais de Eucalyptus urophylla x E. grandis em função do substrato
(2012-01-01)
Considering the increasing demand for seedlings of plants for aforestation and the scarcity of raw materials for the substrates used for plant growth, it is necessary to evaluate new components and formulations that ensure ...
Potassium supply to cotton roots as affected by potassium fertilization and liming
(Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), 2003-05-01)
O algodoeiro (Gossypium hirsutum ) apresenta alta exigência de K e é muito sensível a baixo pH do solo. A maior parte do K chega às raízes das plantas por difusão no solo. Por existir interação do K com Ca e Mg, a calagem ...
Sink strength of citrus rootstocks under water deficit
(2021-08-01)
Carbon allocation between source and sink organs determines plant growth and is influenced by environmental conditions. Under water deficit (WD), plant growth is inhibited before photosynthesis and shoot growth tends to ...