|
|
|
Registros recuperados: 238 | |
|
|
Cortez Hernández, Graciano. |
En la Mixteca Poblana, predominan suelos calcáreos que por su pH alcalino impiden que las plantas puedan absorber los nutrimentos como hierro y zinc, ocasionando la clorosis férrica, afectando los cultivos de esta región, tales como: caña de azúcar, sorgo, maíz, frijol e incluso los árboles frutales, repercutiendo en el desarrollo, rendimiento y en casos severos la muerte de la planta. En esta región está ubicado el ingenio azucarero de Atencingo que genera anualmente 45 mil toneladas de desechos orgánicos (cachaza). El objetivo de esta investigación fue evaluar el efecto de la incorporación de compost de cachaza al suelo en la corrección de clorosis férrica y rendimiento de sorgo. Se incorporó compost de cachaza a razón de cero, cinco y diez t ha-1 en... |
|
Palavras-chave: Dosis de fertilización; Compost de cachaza; Deficiencia; Nutrimentos; Fertilización orgánica; Dose of fertilization; Compost; Filter cake; Deficiency; Nutrients; Organic fertilizer; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional. |
Ano: 2010 |
URL: http://hdl.handle.net/10521/335 |
| |
|
|
Cardoso del Río, Israel. |
Con el objetivo de identificar las deficiencias nutrimentales relacionadas con la incidencia de la peca de la guayaba en región oriente del estado de Michoacán, se realizó un muestreo de suelo y foliar el 8 de mayo de 2007 para la obtención de un diagnóstico preliminar para la posterior aplicación de tratamientos foliares que contrarrestaran posibles deficiencias relacionadas con los daños de la peca en fruto, en tres huertos de los municipios Zitácuaro, Juárez y Jungapeo. La aplicación de los tratamientos fue vía foliar, éstos fueron: 1) fertilización mineral, empleando la formulación NV3, consistente en 1.0, 1.0, 2.0, 2.0, 2.0, 0.03, 0.05, 0.02, 0.05 y 0.02 g L-1 de Urea, MgSO4, KNO3, CaNO3, KH2PO4, H3BO3, MnSO4 4H2O, CuSO4 5H2O, ZnSO4 7H2O y FeEDTA,... |
|
Palavras-chave: Psidium guajava; Guava; Guayaba; Michoacán; Deficiencias nutrimentales; Nutrimientos; Nutrients; Nutrimental dynamics; Maestría; Edafología. |
Ano: 2010 |
URL: http://hdl.handle.net/10521/197 |
| |
|
| |
|
|
Benítez Domínguez, Lizeth. |
Las heliconias son especies que desempeñan importantes funciones en los ecosistemas y que tienen un valor comercial alto debido a sus vistosas inflorescencias. Estas especies normalmente se reproducen de manera asexual y su producción se reduce a manejos tradicionales, por lo que existen pocos estudios de sus semillas y del manejo nutrimental de las plantas para elevar su producción. En esta investigación de hicieron estudios anatómicos, fisiológico y nutrimentales de cinco especies de heliconias: Heliconia bourgaeana, H. collinsiana, H. latispatha, H. psittacorum y H. rostrata. Las semillas de estas especies resultaron impermeables al agua. En H. collinsiana y H. latispatha los embriones se encontraron bien desarrollados y sin daños después de un año de... |
|
Palavras-chave: Heliconiaceae; Embrión; Endospermo; Ácido abscísico; Nutrimentos; Heliconiaceae; Embryo; Endosperm; Abscisic acid; Nutrients; Maestría; Edafología. |
Ano: 2010 |
URL: http://hdl.handle.net/10521/80 |
| |
|
|
Cardoso del Río, Israel. |
Con el objetivo de identificar las deficiencias nutrimentales relacionadas con la incidencia de la peca de la guayaba en región oriente del estado de Michoacán, se realizó un muestreo de suelo y foliar el 8 de mayo de 2007 para la obtención de un diagnóstico preliminar para la posterior aplicación de tratamientos foliares que contrarrestaran posibles deficiencias relacionadas con los daños de la peca en fruto, en tres huertos de los municipios Zitácuaro, Juárez y Jungapeo. La aplicación de los tratamientos fue vía foliar, éstos fueron: 1) fertilización mineral, empleando la formulación NV3, consistente en 1.0, 1.0, 2.0, 2.0, 2.0, 0.03, 0.05, 0.02, 0.05 y 0.02 g L-1 de Urea, MgSO4, KNO3, CaNO3, KH2PO4, H3BO3, MnSO4 4H2O, CuSO4 5H2O, ZnSO4 7H2O y FeEDTA,... |
|
Palavras-chave: Psidium guajava; Guava; Guayaba; Michoacán; Deficiencias nutrimentales; Nutrimientos; Nutrients; Nutrimental dynamics; Maestría; Edafología. |
Ano: 2010 |
URL: http://hdl.handle.net/10521/197 |
| |
|
|
García Pérez, José Luis. |
El preacondicionamiento de la planta se realiza durante la etapa final de vivero y tiene como propósito favorecer su lignificación para que sea capaz de tolerar el estrés hídrico, nutricional y mecánico en los sitios de plantación. Esto se logra mediante un manejo adecuado de prácticas culturales como la fertilización y los riegos, mientras se elimina el efecto invernadero las plantas se exponen a condiciones ambientales de temperatura, humedad relativa e intensidad de luz, semejantes a las presentes en el campo. Se evaluó el efecto de: a) cuatro condiciones ambientales (invernadero, intemperie, malla sombra y malla sombra más intemperie) y b) tres niveles de fertilización (sin fertilización, dosis baja y dosis alta) y la interacción de éstos durante el... |
|
Palavras-chave: Pinus engelmannii; Calidad de planta; Fisiología; Morfología; Nutrimentos; Seedling quality; Physiology; Morphology; Nutrients; Forestal; Maestría; Condición ambiental. |
Ano: 2014 |
URL: http://hdl.handle.net/10521/2334 |
| |
|
|
Benítez Domínguez, Lizeth. |
Las heliconias son especies que desempeñan importantes funciones en los ecosistemas y que tienen un valor comercial alto debido a sus vistosas inflorescencias. Estas especies normalmente se reproducen de manera asexual y su producción se reduce a manejos tradicionales, por lo que existen pocos estudios de sus semillas y del manejo nutrimental de las plantas para elevar su producción. En esta investigación de hicieron estudios anatómicos, fisiológico y nutrimentales de cinco especies de heliconias: Heliconia bourgaeana, H. collinsiana, H. latispatha, H. psittacorum y H. rostrata. Las semillas de estas especies resultaron impermeables al agua. En H. collinsiana y H. latispatha los embriones se encontraron bien desarrollados y sin daños después de un año de... |
|
Palavras-chave: Heliconiaceae; Embrión; Endospermo; Ácido abscísico; Nutrimentos; Heliconiaceae; Embryo; Endosperm; Abscisic acid; Nutrients; Maestría; Edafología. |
Ano: 2010 |
URL: http://hdl.handle.net/10521/80 |
| |
|
|
Magalhães,Adriana G.; Rolim,Mario M.; Duarte,Anamaria S.; Pedrosa,Elvira M. R.; Silva,Enio F. de F. e. |
The aim of this study was to evaluate chemical attributes alterations of a clay-loam textured soil and dry mass accumulation of maize submitted to application of cassava wastewater doses in three assessment periods. The experiment was conducted under greenhouse using a completely randomized experimental design in a factorial 5 × 3, with four replicates. The analyzed factors of research were doses of cassava wastewater (0; 12.6; 25.2; 50.4; 75.6 m3 ha-1) andassessment periods (20, 40 and 52 days after germination). The following parameters were determined: electric conductivity of soil saturation extract, pH in water, content of available P, content of exchangeable K+, Ca2+, Mg2+ and Na+ of soil, dry mass of leaves and stem. The application of cassava... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Residue; Starch; Nutrients; Organic fertilization; Zea mays. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300458 |
| |
|
|
Andrade,Carolyne W. L. de; Montenegro,Suzana M. G. L.; Miranda,Jarbas H. de; Montenegro,Abelardo A. de A.; Assis,Fred M. C. V. de. |
ABSTRACT The application of chemical substances to the soil together with little attention given to the possible environmental impacts, transformed the environment into a recipient of waste. The aim of this study was to simulate the movement of water and solutes (sodium and potassium together) using the STANMOD and HYDRUS-2D models in a typical Haplic Planosol under the application of wastewater via surface irrigation under different flow rates. The experiment was conducted in the laboratory by miscible displacement tests, first using columns with deformed soil under saturation and steady water flow conditions, at a rate of 11.7 cm3 min-1, to obtain transport parameters of sodium and potassium ions, and in the applied residual water, the values of 475 and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modeling; Nutrients; Soil physical properties; Water reuse. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600874 |
| |
|
|
Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P. de. |
ABSTRACT Constructed wetland systems have been used to treat different wastewater; among their essential components are the cultivated plant species and type of substrate used to fill them. The choice of plant species and type of substrate are important for the good system performance in wastewater treatment. This study aimed to evaluate the extraction capacity of Napier and Tifton 85 grasses when cultivated at different positions in horizontal subsurface flow constructed wetlands (HSSF-CWs) filled with different substrates in wastewater treatment from a bulk milk-cooling tank (MTWW). The experimental unit consisted of four HSSF-CWs, in which an average surface organic loading rate of 318 kg ha−1 d−1 of BOD5,20 was imposed and a hydraulic holding time of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wastewater; Forage; Nutrients; Built wetlands. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500668 |
| |
|
|
Oliveira,Jacineumo F. de; Rodrigues,Fernando N.; Fia,Ronaldo; Vilela,Hévelyn S.; Mafra,Dayana C. B.. |
ABSTRACT: The aim of this study was to evaluate the performance of Tifton 85 grass cultivated in soil columns and fertilized with different wastewater doses of swine slaughterhouse. The experiment was conducted in the Environmental Engineering Center and Sanitary of UFLA/MG in PVC columns filled with Dark Red Latosol (Oxisol) and randomly distributed. The treatments applied with nitrogen based load (300 kg ha de N years−1) consisted of four doses of SW and AQT0 control at random. Three cuts were performed, at 60, 90 and 120 days after planting. The highest yields were 10.06, 16.82 and 20.39 t ha−1 in AQT0, AAT4 and AAT3 treatments, respectively. With the increase of nutrients by N rates and root development of Tifton 85 grass, we observed higher... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Productivity; Forage; Nutrients; Disposal; Agroindustrial wastewaters. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000400790 |
| |
|
|
Rabalais,Nancy N. |
The seasonal formation of a bottom-water layer severely depleted in dissolved oxygen has become a perennial occurrence on the Louisiana continental shelf adjacent to the Mississippi River system. Dramatic changes have occurred in this coastal ecosystem in the last half of the 20th century as the loads of dissolved inorganic nitrogen tripled. There are increases in primary production, shifts in phytoplankton community composition, changes in trophic interactions, and worsening severity of hypoxia. The river-influenced continental shelf is representative of similar ecosystems in which increased nutrient flux to the coastal ocean has resulted in eutrophication and subsequently hypoxia. The hypoxic conditions (dissolved oxygen less than 2 mg L-1) cover up to... |
Tipo: Journal article |
Palavras-chave: Anoxia; Hypoxia; Eutrophication; Nutrients; Nitrogen. |
Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300015 |
| |
|
|
Lima,Júlio César de; Loss-Morais,Guilherme; Margis,Rogerio. |
MicroRNAs (miRNAs) have been identified as key molecules in regulatory networks. The fine-tuning role of miRNAs in addition to the regulatory role of transcription factors has shown that molecular events during development are tightly regulated. In addition, several miRNAs play crucial roles in the response to abiotic stress induced by drought, salinity, low temperatures, and metals such as aluminium. Interestingly, several miRNAs have overlapping roles with regard to development, stress responses, and nutrient homeostasis. Moreover, in response to the same abiotic stresses, different expression patterns for some conserved miRNA families among different plant species revealed different metabolic adjustments. The use of deep sequencing technologies for the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MiRNAs; Development; Abiotic stress; Nutrients; Deep sequencing. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600023 |
| |
|
|
Hoehne,Lucélia; Altmayer,Taciélen; Martini,Maira C; Finatto,Jordana; Brietzke,Débora T; Kuhn,Daniel; Schweizer,Ytan A; Vettorello,Gabriela; Cordeiro,Sabrina G; Ethur,Eduardo M; Freitas,Elisete M de; Severo Filho,Wolmar A. |
ABSTRACT This study aims to verify the most suitable substrate formulation based on proportions of earthworm humus and soil to improve the quality of organic strawberries. Vermicomposting generated humus and strawberry seedlings were planted in different humus:soil ratios: (0:100; 20:80; 40:60; 60:40; 80:20 and 100:0, respectively). The proportional conditions were characterized after planting and after 60-day cultivation, plants were harvested, and chemical characterizations of the soil and plants were made. We verified that with an increase of humus content in the substrate, an increase in values of N, P, K, pH and organic matter in soil and dry and fresh mass in shoot area of the plants were noticed. In relation to fruits, pH, humidity and sodium... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria x ananassa; Húmus; Fertilizer; Nutrients. |
Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000100101 |
| |
|
|
Rattin,Jorge E.; Andriolo,Jerônimo L.; Witter,Márcio. |
The nitrogen concentration in dry matter of the fifth leaf during growth of a greenhouse tomato crop was determined. Plants of hybrid Monte Carlo were grown in 4.5 L bags, using a commercial substrate, in a plant density of 3.3 plants m-2. A nutrient solution containing, in mmol L-1: KNO3, 4.0; K2SO4, 0.9; Ca(NO3)2, 3.75; KH2PO4, 1.5; MgSO4, 1.0; iron chelate 19. 10³, was used as reference. Microelements were added by a commercial mixture. The T3 treatment was equal to the reference nutrient solution, whereas in treatments T1, T2, T4 and T5 quantities of all nutrients from T3 were multiplied by 0.25, 0.50, 1.25 and 1.50, respectively. In each treatment, the volume of 1 L of nutrient solution was supplied to each plant once a week by fertigation.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Nutrients; Mineral nutrition; Fertilization. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362002000400023 |
| |
|
| |
|
|
Freitas,Marta Simone Mendonça; Gonçalves,Ygor de Souza; Lima,Thaísa Capato; Santos,Paulo Cesar dos; Peçanha,Diego Alves; Vieira,Marlene Evangelista; Carvalho,Almy Júnior Cordeiro de; Vieira,Ivo José Curcino. |
ABSTRACT Potassium (K) is one of the most required agricultural crop macronutrients, with potassium chloride being the most applied source. However, this fertilizer is not recommended for several crops due to its high chlorine content, promoting final product quality losses, thus being replaced by potassium sulphate. The aim of the present study was to evaluate the production and macronutrient, essential oil and linalool contents of coriander fruits submitted to different potassium sources and doses. The research was performed in a greenhouse, in plastic 46 kg boxes applying a mixture of soil and sand as substrate. The experimental design was of randomized blocks, applying a 2x4 factorial arrangement, with two potassium sources (potassium chloride and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coriandrum sativum; Nutrients; Secondary metabolism; Linalool. |
Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300268 |
| |
|
|
Paula Filho,Galdino X; Barreira,Tibério F; Santos,Ricardo HS; Priore,Silvia E; Lucia,Ceres M Della; Pinheiro-Sant’Ana,Helena M. |
ABSTRACT Wild mustard plant (Sinapis arvensis), Brassicaceae, is a wild vegetable found in forest area, domestic orchards and it is consumed by rural population. This study aimed to evaluate chemical composition (moisture, total dietary fiber, lipids, proteins, ash, carbohydrates and total energetic value), concentration of carotenoids, vitamins (C and E) and minerals (K, Ca, Mg, Cu, Fe, Zn, Mn, Na, Cr, Se and Mo) and the contribution by this vegetable to the recommendations of daily consumption of nutrients for adult individuals. Concentrations of provitamin A (252.21 RAE/100 g), Se (0.04 mg/100 g) and Fe (5.91 mg/100 g) stood out, in which this vegetable was considered as an excellent source for these nutrients. In addition, wild mustard was considered a... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sinapis arvensis; Unconventional vegetables; Nutritional value; Nutrients. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100059 |
| |
|
|
Стельмах, Л. В.; Куфтаркова, Е. А.; Бабич, И. И.. |
На основе данных, полученных на трёх станциях в прибрежных поверхностных водах Чёрного моря (в районе Севастополя) в 2006 – 2007 гг., представлена сезонная динамика удельной скорости роста фитопланктонного сообщества. В течение года этот показатель изменялся приблизительно на порядок. Максимальные значения (2.00 – 2.70 сутки-1) наблюдались в периоды весеннего и осеннего «цветения» воды, вызванного диатомовой водорослью Chaetoceros socialis. Минимальные величины (0.06 – 0.10 сутки-1) отмечены зимой, когда в планктоне доминировали два вида диатомовых водорослей Sceletonema costatum и C. socialis. Получены количественные зависимости между концентрацией нитратов и кремния, с одной стороны, и удельной скоростью роста фитопланктона, с другой. Основным фактором,... |
Tipo: Journal Contribution |
Palavras-chave: Фитопланктон; Скорость роста; Хлорофилл a; Биогенные вещества; Чёрное море; Phytoplankton; Growth rate; Chlorophyll a; Nutrients; Black Sea; Фітопланктон; Швидкість росту; Хлорофіл a; Біогенні сполуки; Чорне море. |
Ano: 2009 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/843 |
| |
|
| |
Registros recuperados: 238 | |
|
|
|