Nutrient Solutions
Mostrando 25-36 de 151 artigos, teses e dissertações.
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25. Cd-tolerance markers of Pfaffia glomerata (Spreng.) Pedersen plants: anatomical and physiological features
Physiological and anatomical features of Cd-tolerance in Pfaffia glomerata were examined by exposing plantlets to nutrient solutions with increasing Cd concentrations (0, 15, 45, and 90 µmol Cd L-1), and possible Cd-tolerance markers were established. Cd contents were found to be higher in roots than in shoots. According to the bio-concentration factor data
Braz. J. Plant Physiol.. Publicado em: 2012-12
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26. Cálcio e silício via foliar na qualidade de gérbera de corte / Foliar application of calcium and silicon in the quality of cut gerbera
Nutritional management is one of the factors that affect cut gerbera quality and longevity of postharvest flower. Many studies have demonstrated the successful calcium and silicon application in the quality of numerous crops, including cut flowers, such as chrysanthemum and sunflower. Thus, the aim of this study was to evaluate the foliar application effect
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2011
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27. Antioxidant system of ginseng under stress by cadmium
Toxic levels of Cd can cause protein denaturation and oxidative stress, which result in membrane damage, enzimatic activity changes and other metabolic damage. Some plants may show alteration in the activity of their antioxidant enzymes as a heavy metal tolerance mechanism. This study aims at evaluating the role of enzymes of the antioxidant system in adapti
Scientia Agricola. Publicado em: 2011-08
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28. Root system characteristics of Marandu palisadegrass supplied with nitrogen and magnesium rates
The development of root system of forage grasses is influenced by the supply of mineral nutrients. The experiment was carried out in a greenhouse in Piracicaba, São Paulo State, with the objective of evaluating the effect of nitrogen and magnesium rates on dry mass yield, total length and surface, specific length and surface, and concentrations of nitrogen,
Revista Brasileira de Zootecnia. Publicado em: 2011-07
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29. Parâmetros morfológicos para estabelecer tolerância diferencial à toxicidade de alumínio em cultivares de arroz.
Dois experimentos em casa de vegetação foram conduzidos visando identificar parâmetros morfológicos ligados à tolerância ao alumínio (Al) e estabelecer a concentração de Al e o tempo de cultivo suficientes para a expressão da tolerância ao Al, em duas cultivares de arroz, em solução nutritiva. Plantas de determinado comprimento radicular máximo
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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30. Etiology and epidemiology of Pythium root rot in hydroponic crops: current knowledge and perspectives.
The etiology and epidemiology of Pythium root rot in hydroponically-grown crops are reviewed with emphasis on knowledge and concepts considered important for managing the disease in commercial greenhouses. Pythium root rot continually threatens the productivity of numerous kinds of crops in hydroponic systems around the world including cucumber, tomato, swee
Summa Phytopathologica. Publicado em: 2011
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31. Minimização do custo de produção como critério na formulação de dietas para bovinos de corte.
RESUMO: O critério de minimização do custo de matéria seca (MCMS) é frequentemente adotado para a formulação de dietas para animais. Esse critério, entretanto, possui limitações para bovinos, pois a solução aplica-se apenas a um nível de desempenho animal esperado, enquanto na prática, existem vários níveis de desempenho possíveis de serem i
Planaltina. Publicado em: 2011
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32. Um problema de fronteira livre para um sistema eliptico-hiperbolico : uma aplicação ao crescimento de tumores / A free boundary problem for an elliptic-hyperbolic system : an application to tumor growth
In this dissertation we detail the analysis done in the article by X. Chen, A. Friedman, A free boundary problem for an elliptic-hyperbolic system,: an application to tumor growth, SIAM J. Math. Anal. 35, 2003, which considers a free boundary value problem for an elliptic-hyperbolic system of partial differential equations related to the Hele-Shaw problem. T
Publicado em: 2010
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33. Influência da adubação em doses variadas na produtividade e no estado nutricional da cultura do café (Coffea arabica L.) / Influence of variable rate fertilizer application on yield and nutritional status of coffee crop (Coffea arabica L.)
The precision agriculture techniques, besides adding tools to identify the causes of variability found in the fields, provide solutions for this variability to be corrected or for the best management solution when the variability is unavoidable. Brazil is the biggest producer of coffee within an increasing market. Therefore, because of the potential yield an
Publicado em: 2010
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34. Productive, nutritional and metabolic characteristics of marandu palisadegrass grown with nitrogen and magnesium rates / Características produtivas, nutricionais e metabólicas do capim-marandu submetido a doses de nitrogênio e magnésio
Productive, nutritional and metabolic characteristics of the forage plants may be changed by the nitrogen and magnesium availability. The objective was to study the effects of nitrogen and magnesium rates on marandu palisadegrass growth, by evaluating the shoot and root yield, leaf and root concentrations of nutrients and leaf concentration of inorganic form
Publicado em: 2010
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35. Relaciones nitrógeno-potasio en fertirriego para el cultivo protegido del tomate en suelo Ferralítico Rojo
The objective of the present work was to evaluate the effect of nutrient solutions in fertirrigation, with different nitrogen-potassium ratios, on yield and quality of tomato fruits (hybrid Hazera 3019) in Red Ferralitic soil (Oxisol). The trial was performed at Instituto de Investigaciones Hortícolas Liliana Dimitrova (La Habana, Cuba). Four nutrient solut
Pesquisa Agropecuária Brasileira. Publicado em: 2009-05
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36. Cálcio e boro para soja-perene: características anatômicas e agronômicas e concentração de nutrientes / Calcium and boron for perennial soybean: anatomical and agronomic characteristics and nutrient concentrations
Forage legumes have been mixed with grasses and contributed to improve the sustainability of the soil- plant- animal system. Perennnial soybean (Neonotonia wightii) is one forage legume well adapted to the tropical areas. Calcium and boron have resulted in benefits for plant development, particularly in legume species. This study was set with the objectives
Publicado em: 2008