REQUERIMIENTOS NUTRIMENTALES DE LA FLOR AVE DE PARAÍSO (Strelitzia reginae Aiton)

With the aim of understanding the nutritional balance and requirement of the bird of paradise flower (Strelitzia reginae Aiton), the need for nutrients under a commercial production system was quantified, in a plot established 10 years ago, with use of fertilization, pruning, irrigation, pest and disease control, with a population density of 1,250 plants ha-1, through the chemical analysis of nutritional concentration in the biomass produced in a year. It was concluded that the annual nutrient requirement in the crop was the following: macronutrients (Kg ha-1) N (68.22), P2O5 (23.23), K2O (145.73), CaO (134.66), MgO (10.38) and micronutrients (g ha-1), Cu (174.7), Fe (282.4), Mn (288.2) and Zn (390.6).Con la finalidad de conocer el balance y requerimiento nutrimental de la flor Ave del pparaíso (Strelitzia reginae Aiton), se cuantificó la necesidad de nutrimentos bajo sistema comercial de producción, en una parcela de 10 años de establecida, con manejo de fertilización, poda, riego, control de plagas y enfermedades, con una densidad de población de 1,250 matas ha-1, mediante el análisis químico de concentración nutrimental en la biomasa producida en un año. Se concluyó que el requerimiento nutrimental anual en el cultivo fue el siguiente: Macronutrimentos (Kg ha-1) N (68.22), P2O5 (23.23), K2O (145.73), CaO (134.66), MgO (10.38) y micronutrimentos (g ha-1), Cu (174.7), Fe (282.4), Mn (288.2) y Zn (390.6)

Photo-detection using Bose-condensed atoms in a micro trap

A model of photo-detection using a Bose--Einstein condensate in an atom-chip based micro trap is analyzed. Atoms absorb photons from the incident light field, receive part of the photon momentum and leave the trap potential. Upon counting of escaped atoms within predetermined time intervals, the photon statistics of the incident light is mapped onto the atom-count statistics. Whereas traditional photo-detection theory treats the emission centers of photo electrons as distinguishable, here the centers of escaping atoms are condensed and thus indistinguishable atoms. From this an enhancement of the photon-number resolution as compared to the commonly known counting formula is derived.Comment: 11 pages, 5 figures; revised versio

Corporal and reproductive parameter variations in cotton and soya seed supplemented heifers from Chaco, north east of Argentina

Fil: Koza, Gabriela A. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias; Argentina.Fil: Mottet, H. A. Actividad privada; Argentina.Fil: Barboza, N. N. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias; Argentina.Fil: Mussart, Norma Beatriz. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias; Argentina.Fil: Fioranelli, Santiago Alejo. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias; Argentina.Fil: Gauna Pereira, María del Carmen. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias; Argentina.Fil: Álvarez Chamale, G. M. Actividad privada; Argentina.Fil: Coppo, José Antonio. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias; Argentina.El presente estudio es parte de un proyecto encauzado a lograr el adelanto de la edad reproductiva de las vaquillas de reposición mediante el mejoramiento de su alimentación. Noventa vaquillas de 180 kg de peso vivo fueron mantenidas sobre pastura natural, distribuidas en tres lotes de 30 ejemplares cada uno (10 Braford + 10 Brangus + 10 cruza Limusin). Cada lote fue sometido durante su primer y segundo invierno (126 y 131 días respectivamente), a distintas estrategias alimentarias. El lote SS fue suplementado con semillas de soja (2,60 kg/animal/día), el lote SA recibió semillas de algodón (2,40 kg/animal/día) y lote CT operó como control sin suplementación. Mensualmente se efectuaron pesajes y mediciones morfométricas a todos los animales. Al final de cada período de suplementación invernal, 19 vaquillas de cada lote fueron exploradas ginecológicamente con un ecógrafo. Bajo diseños aleatorizados y medidas repetidas, los resultados fueron analizados con el software Statistica 2002. Durante el primer invierno, las ganancias finales de peso fueron de 17 y 23 kg para SA y SS respectivamente, en tanto que CT registró una pérdida de 5,36 kg. En el segundo invierno fueron de 35 y 40,5 kg para SA y SS, mientras que el lote CT perdió 9,63 kg. Durante el primer invierno la ganancia diaria de peso/animal fue de 0,33 g en SA, 0,34 g en SS y -0,22 g en CT (p = 0,0001); en el segundo fueron de 0,28; 0,31 y -0,10 g respectivamente. Al final, la condición corporal fue más alta en SA y SS (4,15 y 4,23), significativamente distinta (p=0,0001) de CT (3,83). El diámetro torácico y la altura a la cadera no fueron influenciados significativamente. Las dimensiones de ovarios y útero fueron mayores en SA y SS que en CT (p&lt;0,05). Se concluye que la suplementación con semillas oleaginosas mejoró las ganancias de peso, condición corporal y desarrollo genital de las vaquillas.In this trial we explain a feeding management tool destined to reduce age of calving of heifers. Ninety heifers of 180 kg liveweight were maintained on natural pasture, distributed in three groups of 30 animals each (10 Braford + 10 Brangus + 10 Limusin crossbreed). During their first and second winter (126 and 131 days, respectively), each group was subjected to different alimentary strategies. Group SS was supplemented with soya seeds (2.60 kg/animal/day), group SA received cottonseed (2.40 kg/animal/day) and group CT operated as control without supplementation. Every month, weighing and morphometrical evaluations were made on all the animals. Nineteen heifers of each group were gynecologically explored by echography at the end of every period of winter supplementation. Results were statistically analyzed with randomized and repeated measures designs, by means of the software Statistica 2002. During the first winter, final liveweight earnings were 17 and 23 kg for SA and SS respectively, whereas CT registered a loss of 5.36 kg. In the second winter, earnings were 35 and 40.5 kg for SA and SS, while group CT lost 9.63 kg. Liveweight/animal daily gains were 0.33 g in SA, 0.34 g in SS and -0.22 g in CT during the first winter (p = 0.0001); for the second winter they were 0.28; 0.31 and -0.10 g, respectively. At the end, body condition was higher in both SA and SS (4.2 and 4.7), data which were significantly different (p=0.0001) compared to CT (3.7). Thoracic diameter and hip height were not significantly influenced. Ovary and uterus dimensions were bigger in SA and SS than in CT (p <0.05). We conclude that oleaginous seeds supplementation improved liveweight earnings, body condition, and genital development of heifers

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

Meeting abstrac

Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

Contains fulltext : 172380.pdf (publisher's version ) (Open Access

Potassium fertilization in fruit tree

A review of the effect of potassium fertilization in tropical fruit was performed because of the importance of the element potassium (K) related to increase quality, yield and fruit size, also for the many roles in physiological processes plants. The aim of this article is to collect updated information about the role of K in soil, the absorption and interaction of this element with other nutrients, and the functions of this in plants. Symptoms of K deficiency in plants, the relationship with pH in soil and K availability are also approached, as the nutrition of fruit trees with potassium. It is concluded that in most investigations potassium fertilization increased the quality, yield and fruit size; in addition, the importance of this element on the response of the plant when affected by some form of stress (biotic and abiotic) compared to control treatments

TÉCNICAS SUSTENTABLES PARA EL MANEJO DE LA PRODUCCIÓN DEL CHILE HABANERO (Capsicum Chinense Jacq.)

Se efectuó una revisión de las investigaciones reportadas en diversas áreas de la agronomía que se pueden aplicar al sistema de producción de chile habanero. Se recopilaron algunos trabajos relacionados con la sustentabilidad propuestos para el cultivo en cuanto a nutrición, manejo de humedad, aplicación de productos hormonales, utilización de productos orgánicos y aplicación de microorganismos. Se concluye que es necesario conocer más a fondo los componentes involucrados en el sistema de producción del cultivo y así lograr una mejor relación beneficio-costo para el productor, de una manera realmente sustentable

Phosphorus extraction and requirements in 'Big Brother' habanero pepper (Capsicum chinense JACQ.) [Extração e requerimento de fósforo na pimenta de cheiro (Capsicum chinense jacq.) 'Big Brother']

The demand for nutrients is one of the three factors that allow to determine the fertilization of crops. The lack of this value can lead to an excess or deficit of fertilization; the first situation involves a negative effect on the environment while the latter does not allow the crop to express its productive potential. The objective of the present study was to determine the internal phosphorus (P) requirement to estimate nutrient demand in 'Big Brother' habanero pepper. In a production system of soilless culture, the effect of five treatments of H2PO4- (0.25, 0.5, 1.0, 1.5 and 2.0meq·l-1) was assessed on the variables: total dry biomass, fruit production, P concentration in leaves, stems, roots, flowers and fruits, and extraction of P (g/plant). The plants were placed in 15 liter containers and volcanic rock was used as substrate. The plants were grown for 90 days after transplantation. Differences in total dry biomass, fruit production, P concentration in roots and fruits, and P extraction by plants were found. The increased production of fruit and total dry biomass were obtained with 1.5meq·l-1 H2PO4-, with 851.71 and 182.26 g/plant, respectively. The treatment with 2.0meq·l-1 H2PO4- had the highest P concentration in roots with 1.43% and reduced significantly the fruit production. The internal P requirement for cultivation of habanero pepper was 0.22%, which was obtained with the concentration of 1.5meq·l-1 H2PO4- and it represented a nutrient demand of 0.47kg P/t of fresh fruit. © 2015, Interciencia Association. All rights reserved

Efecto de la temperatura y humedad relativa sobre el desarrollo de los hongos entomopatógenos

The relative humidity (HR) and temperature are important factors for the development of entomopathogenic fungi Verticillium lecanii (V2 and V3), Paecilomyces fumosoroseus (P1, P2, P3, PF and PG), P. farinosus (PN) and Beauveria bassiana (Bb1 and Bb17). The biological activity of each strain increased when the relative humidity was between 81 and 92%. Nymphet stage was more susceptible than egg stage. The time of germination of conidia was different among fungi layers and among temperatures. At lower temperatures (16.3°C), conidia delayed more than a day to germinate. In contrast, at higher temperatures, more than 28.5°C, the delayed time was less than one day. At 15°C, strains that achieved conidia were P1, PF, Bb1, Bb17, V2 and V3. However, strains that did not form conidia were P2 and P3. At 31.7°C, all the strains produced conidia, except PF. The base temperature of the species and strains of the entomopathogenic fungi was between 10 and 13°C. The strains PG, PF, Bb1, P2 and V2 needed a similar amount of day-degree, to form conidia in an artificial medium and on N4 of T. vaporariorum. On the other hand, V3 achieved greater rate of development per day, 0.64, than PG strain ( 0.30) at 30.4°C.La humedad relativa (HR) y la temperatura son factores importantes en el desarrollo de los hongos entomopatógenos Verticillium lecanii (V2 y V3), Paecilomyces fumosoroseus (P1, P2, P3, PF y PG), P. farinosus (PN) y Beauveria bassiana (Bb1 y Bb17). La actividad biológica de la cepa de las tres especies de hongos fue mayor cuando la humedad relativa estuvo en un rango de 81-92%. Las ninfas fueron más susceptibles que los huevecillos. El tiempo de germinación de las conidias varió entre las cepas de los hongos y entre las temperaturas. A temperaturas menores de 16.3°C las conidias tardaron más tiempo para germinar (más de un día); mientras que en temperatura superiores a 28.5°C el tiempo fue menor (menos de un día). A 15°C, las cepas que lograron formar conidias fueron P1, PF, Bb1, Bb17, V2 y V3, y las que no formaron fueron P2 y P3. En la temperatura de 31.7°C todas las cepas produjeron conidias, excepto PF. La temperatura base de las especies y cepas de los hongos entomopatógenos fue de 10°C como la más baja y de 13°C como la más alta. Las cepas PG, PF, Bb1, P2 y V2 requirieron similar cantidad de Grados-día de desarrollo, para formar conidias en medio artificial y sobre N4 de Trialeurodes vaporariorum, Por otro lado, V3 logró la mayor tasa de desarrollo por día (0.64) y PG la menor (0.30) en la temperatura de 30.4°C