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| HERNANDES, A.; SOUZA, H. A. de; AMORIM, D. A. de; NATALE, W.; LAVRES JUNIOR, J.; BOATETTO, A. E.; CAMACHO, M, A.. |
| Abstract: Chemical analysis of leaves is an effective tool for detecting nutritional imbalances and providing data for fertilizer recommendations. Therefore, it is extremely important to establish criteria for interpreting these results. The DRIS (Diagnosis and Recommendation Integrated System) method is an alternative to the interpretation of results of leaf analysis as it allows the calculation of indexes for each nutrient, using its relations with others and comparing them with a reference population. Thus, we aimed to establish preliminary DRIS norms, by both Beaufils’s and Jones’s methods, and to derive critical levels and nutrient sufficiency ranges in the leaf tissue for Pêra orange, by studying a commercial crop in the growing conditions of the São... |
| Tipo: Artigo de periódico |
Palavras-chave: Nutritional diagnosis; Sweet oranges.; DRIS; Fertilization; Leaf tissue analysis; Citrus sinensis; Laranja Pêra; Nutrição vegetal; Adubação; Análise foliar; Citrus fruits; Nutritive value.. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1007099 |
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| MORAES, M. F. de; REIS, A. R. dos; MORAES, L. A. C.; LAVRES JUNIOR, J.; VIVIAN, R.; CABRAL, C. P.; MALAVOLTA, E.. |
| The aims of the current work were to measure the effect of Mo and Ni on dry-matter yield of rice plants supplied with two N sources (ammonium nitrate and urea) and to evaluate the influence of Mo and Ni on variables related to dry-matter yield, such as activity of both urease and nitrate reductase, chlorophyll, net photosynthesis rate, total N, nitrate content, and Mo and Ni concentrations in roots and shoots. |
| Tipo: Parte de livro |
Palavras-chave: Micronutrientes.; Arroz; Nutrição Vegetal.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/668535 |
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| FRAZÃO, J. J.; LAVRES JUNIOR, J.; BENITES, V. de M.. |
| A produção de fertilizantes organominerais a partir resíduos orgânicos como, por exemplo, a cama de frango tem se tornado uma prática comum, visto os benefícios econômicos e ambientais. O uso de fertilizantes organominerais pode alterar a dinâmica das formas de fósforo (P), visto a sua natureza física e química. No entanto, estudos sobre o tema ainda são incipientes. Dessa forma, objetivou-se com esse estudo avaliar as frações lábeis de P no solo sob aplicação de fertilizante organomineral comparado a uma fonte mineral em doses crescentes de P (0, 125, 250, 375 e 500 mg por vaso). As frações lábeis de P no solo aumentaram significativamente com as doses de P, contudo, não houve diferenças entre os fertilizantes (exceto, na dose de P de 375 mg por vaso).... |
| Tipo: Parte de livro |
Palavras-chave: Cama de Frango; Cama de Galinheiro; Fosfato; Latossolo; Zea Mays. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1131740 |
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| PAULA NETO, A.; FAVARIN, J. L.; REIS, A. R. dos; TEZOTTO, T.; ALMEIDA, R. E. M. de; LAVRES JUNIOR, J.; GALLO, L. A.. |
| Coffee plants require high application rates of nitrogen (N) to produce coffee beans. However, information regarding plant N uptake and assimilation under intensive high-technology cultivation systems is scarce, a situation which restrains the maximizing productivity with minimal N rates. The aim of this study was to evaluate N assimilation enzymes such as nitrate reductase (EC 1.6.6.1), glutamine synthetase (EC 6.3.1.2), urease (EC 3.5.1.5), and N compounds of coffee plants during a phenological cycle in response to N applied by fertigation. Our study was carried out with 7-year-old trees of Coffea arabica L., under a center pivot sprinkler irrigation and fertigation system, with five N rates (0, 200, 400, 600, and 800 kg ha−1) applied to the... |
| Tipo: Artigo de periódico |
Palavras-chave: Café; Nitrogênio; Uréia; Coffea Arábica.; Fertigation; Glutamate-ammonia ligase.. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1021311 |
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