Estimativa de produtividade agroindustrial de cana-de-açúcar por dados espectrais orbitais ETM+/LANDSAT 7Sugarcarne agroindustrial yield forecast by orbital sensor ETM+/LANDSAT 7 data

Os sistemas convencionais de estimativa de safras são geralmente onerosos e demorados, portanto, é importante o desenvolvimento de métodos mais rápidos para a obtenção de dados. Propõe-se, neste trabalho, obter uma metodologia para estimar a produtividade agroindustrial da cana-de-açúcar pelo sensor orbital ETM+/LANDSAT 7 e utilizando-se dados reais áreas de produção de cana-de-açúcar na região de Paraguaçu Paulista, (SP), da variedade RB835486, de primeiro corte. Um banco de dados foi elaborado e escolheram-se talhões com épocas de plantio semelhantes, enquanto que para a coleta de dados espectrais foram testadas duas metodologias: na primeira, foram estabelecidas áreas de coleta de dados espectrais dentro dos talhões, e estes foram representados pelas respectivas médias aritméticas dos pixels amostrados e, na segunda, procedeu-se a uma classificação não supervisionada dos dados espectrais dos talhões que, por sua vez, foram representados pela média ponderada do valor dos pixels em sete classes espectrais distintas. As bandas B1, B2, B3, B4, B5 e B7 e seis índices de vegetação, foram utilizados para gerar modelos de regressão linear múltipla, visando à quantificação das características agroindustriais da cultura. Os resultados indicam que é possível estimar essas características através de dados espectrais orbitais, indicados por R2 = 0,69 para produtividade agrícola (Mg ha-1) e em média 0,58, para as características tecnológicas.Abstract Conventional systems for crop yield projections are generally expensive and demand much time. Thus, it is important to develop quicker data obtaining methods. We have proposed a methodology for estimating the sugarcane agroindustrial yield by ETM + / LANDSAT 7 orbital sensor and also by collecting data from sugarcane production areas in Paraguaçu Paulista, São Paulo State, at fields of RB835486 variety in the first harvest. A database was established, and fields that were planted at the same dates were chosen. Two methods for spectral data collection were tested in order to identify best estimation results. In the first method, data collection areas were set within the spectral plots, and these were represented by the specific arithmetic average of the sampled pixels. In the second method, the spectral data went through a non-supervised classification of the plots, which were represented by the weighted average value of pixels in seven different spectral classes. The bands B1, B2, B3, B4, B5 and B7 and six vegetation indices were used to generate multiple linear regression models in order to qualify the crop agroindustrial characteristics. The results indicate that it is possible to estimate these characteristics drawing on orbital spectral data, indicated by R2 = 0.69 for crop yield (Mg ha-1) and a 0.58 average for the technological characteristics

Governance and Upgrading in GVCs: Why does Embeddedness Matter

Purpose – This study’s primary objective is to propose actors’ embeddedness as a source for governance and upgrading within the GVC (Global Value Chain) framework. Design/methodology/approach – This study uses co-word analysis to study the GVC scientific production. The analysis is conducted using controversies mapping from the Theory of Scientific and Technological Change (TSTC). Findings – Two theoretical gaps were identified. First, governance and upgrading have more than one definition. Second, value and network are upgrading strategies. This article proposes the use of the Montenegro and Bulgacov (2014) framework to translate governance and upgrading respectively as network governance and strategic outcomes. Embeddedness matters because it is a stable theoretical concept (Granovetter, 1985) that can be a link between network governance and strategic results. Originality/value – The study’s main contribution is to propose relativist embeddedness as a source of governance and upgrading. The second contribution is to present an ANT-based framework to study governance and its strategic result

Histomoniasis in Peacock (Pavo cristatus) in the Potiguar Semiarid

Background: Histomoniasis is a disease caused by Histomonas meleagridis, a flagellated protozoan that can cause severe necrotizing hepatitis and typhlitis in several bird species. The disease has a cosmopolitan distribution. In experimental infection, peacocks (Pavo spp.) showed susceptibility to histomoniasis, however there are few reports on natural histomoniasis in this species. In northeastern Brazil, reports about its occurrence in avian species are scarce and nonexistent in peacocks. Therefore, this report aims to describe the epidemiological and clinicopathological aspects of a histomoniasis case in a peacock (Pavo cristatus) in the Brazilian semiarid region.Case: A 3-month-old male peacock with a history of apathy and anorexia was attended in the Veterinary Hospital of the Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil. The animal was raised extensively in a farm without basic sanitary measures, also with a history of living with animals of different species. After clinical examination, in which intense apathy and weight loss were confirmed, the bird was submitted to emergency therapeutic measures, however there was no clinical improvement and the bird died. At necropsy, intense diffuse bilateral necrotizing typhlitis and multifocal to coalescent necrotizing hepatitis were observed. Fragments of the organs were collected in 10% formaldehyde buffered with phosphate-saline buffer for histopathological analysis and cecal content were collected for microbiological analysis. Histopathology of the cecum revealed transmural necrotizing typhlitis associated with myriads of trophozoites morphologically compatible with Histomonas meleagridis. The same microorganisms observed in association with necrotizing hepatitis lesions, which allowed the diagnosis of histomoniasis. Also, the bacterium Pantoea agglomerans was isolated from the cecal content.Discussion: The macroscopic and microscopic findings allowed the diagnosis and the first recording of histomoniasis in peacock in the semi-arid region of Rio Grande do Norte. The bird was raised in an extensive breeding and without sanitary management, such as the use of anthelmintics, which may favor infection by the nematode Heterakis gallinarum, that’ transmits the protozoan Histomonas meleagridis. The contamination, which begins by the orofecal route, happens through the ingestion of eggs of the nematode contaminated with H. meleagridis that pass through the gastrointestinal tract, reaching the ceca and causing intense lesions in the organ, such as the bilateral transmural typhlitis that we observed in this case. From ceca, the protozoan has access to the bloodstream and reaches the liver, where it causes necrotic hepatitis, also present in the peacock. Both cecal and hepatic lesions were associated with myriads of microorganisms morphologically compatible with H. meleagridis, which allowed the diagnosis of the disease. The challenge in diagnosing this disease occurs mainly due to nonspecific clinical signs, such as apathy and weight loss, the only signs reported by the breeder and observed in this peacock. Confirmation of the occurrence of histomoniasis in any region is important to establish the disease among the differential diagnoses for the species, as in this case. Since this is the first report of peacock histomoniasis in the semi-arid region of Rio Grande do Norte, it is evident the need to consider the disease among possible diagnoses in cases of nonspecific symptoms and it also demonstrates the need to implement control and prophylaxis measures in peacock breeding aiming to avoid losses of birds and economic losses to the breeders and to promote quality of life to the animals

Nutritional efficiency of Stylosanthes guianensis cv. Mineirão according to soil correction

The main expectation for using leguminous plants in pastures is improving animal production and reducing production costs. This research was carried out in a greenhouse, in order to evaluate the effect of two soil acidity correctives and P rates on P, Ca, Mg, Si, raw protein (RP), neutral detergent fiber (NDF), acid detergent fiber (ADF), and in vitro dry matter digestibility (IVDMD) contents of Stylosanthes guianensis cv. Mineirão. A randomized blocks design was used in a 5x2 factorial arrangement, with five P rates (50 mg dm-3, 100 mg dm-3, 200 mg dm-3, 400 mg dm-3, and 800 mg dm-3 of soil) and two soil correctives (lime and Ca and Mg silicate), with three replications. Both lime and silicate applications, previously to the phosphate fertilization, assured P, Mg, Ca, RP, NDF, and ADF contents, in plants of Mineirão, compatible with good performances of grazing animals. The increase in the silicon content in Mineirão, resulting from silicate application, did not reduce the IVDMD. The substitution of lime by Ca and Mg silicate did not affect the nutritional value of the Mineirão subjected to phosphorus rates

Nitrogen derived from fertilization and straw for plant cane nutrition

O objetivo deste trabalho foi avaliar a recuperação, pela cana-planta, do nitrogênio (15N) proveniente da ureia e de resíduos culturais da palhada e do sistema radicular da cultura da cana (Saccharum spp.)incorporados ao solo. O experimento foi instalado na safra de 2005/2006, com a cultivar SP81-3250. No plantio, foram instaladas microparcelas de 1,5x2 m, em que aplicaram-se doses equivalentes a 80 kg ha-1 de N (ureia com 5,05% de 15N) e 14 Mg ha-1 de resíduos culturais, dos quais 9 Mg ha-1 de palhada (PA) e 5 Mg ha-1 de sistema radicular (SR), marcados com 15N (1,07 e 0,81% de 15N, respectivamente). Durante o ciclo da cultura, determinou-se o acúmulo total de N da planta. Embora o aproveitamento do N oriundo da mineralização dos resíduos culturais (PA e SR) pela parte aérea tenha aumentado expressivamente com o tempo, esta fonte pouco contribuiu para a nutrição da cultura. A recuperação pela cana-planta de 15N-ureia, 15N-PA e 15N-SR foi de 30,3±3,7%, 13,9±4,5% e 6,4±0,9% respectivamente, o que representa 15,9, 4,7 e 1,4% do nitrogênio total acumulado pela parte aérea da cultura.The objective of this work was to evaluate the recovery, by plant cane, of the nitrogen (15N) from urea and from sugarcane (Saccharum spp.) crop residues – straw and root system – incorporated into the soil. The experiment was settled in 2005/2006 with the sugarcane cultivar SP81 3250. At planting, microplots of 2 m length and 1.5 m width were installed, and N applications were done with 80 kg ha-1 N (urea with 5.05% in 15N atoms) and 14 Mg ha-1 crop residues – 9 Mg ha-1 of sugarcane straw (SS) and 5 Mg ha-1 of root system (RS), labeled with 15N (1.07 and 0.81% in 15N atoms, respectively). The total N accumulation by plants was determined during the crop cycle. Although the N use by shoot from crop residue mineralization (PA and SR) increased significantly over time, this source hardly contributed to crop nutrition. The recovery of the 15N-urea, 15N-SS and 15N-RS by plant cane was 30.3±3.7%, 13.9±4.5% and 6.4±0.9%, respectively, representing 15.9, 4.7 and 1.4% of total nitrogen uptake by shoot.

Impacto dos traços de perfeccionismo na percepção de coesão de grupo de jogadores de futsal

El objetivo de este estudio transversal fue investigar la relación entre los rasgos de perfeccionismo y la percepción de cohesión grupal en deportistas de fútbol sala. Participaron 301 deportistas de la Liga Nacional de Fútsal 2013 con una edad media de 25,48 ± 4,90 años. Los instrumentos fueron: Escala de Perfeccionismo Multidimensional para el Deporte-2 y Cuestionario de Ambiente Grupal. Para el análisis se realizó con las pruebas de Kolmogorov-Smirnov, MANOVA, Correlación de Pearson y Regresión Múltiple (p <0,05). Los resultados mostraron que los rasgos del perfeccionismo adaptativo predijeron positivamente la cohesión social para los atletas no clasificados. Mientras tanto, el perfeccionista se preocupa por los rasgos de perfeccionismo poco adaptativo que pueden predecir negativamente la cohesión social y de tareas, con la excepción de la "presión parental percibida", que presentó una predicción positiva en todos los grupos de atletas para la cohesión social y de tareas. Los deportistas no clasificados tenían una mayor percepción de cohesión para la tarea, mientras que los reservas tenían una mayor percepción de los aspectos sociales. Así, podemos concluir que existe una relación positiva entre el perfeccionismo adaptativo y la percepción de cohesión social en deportistas no clasificados, además de una relación negativa entre las dimensiones del perfeccionismo pobremente adaptativo y la cohesión grupal.This cross-sectional study was to investigate the relationship between the traits of perfectionism and the perception of group cohesion in futsal athletes. 301 athletes from the 2013 National Futsal League participated with an average age of 25.48 ± 4.90 years. The instruments were: Multidimensional Perfectionism Scale for Sport-2 and the Group Environment Questionnaire. For analysis, it was conducted using the Kolmogorov-Smirnov, MANOVA, Pearson correlation and Multiple Regression tests (p<0,05). The results showed that the traits of adaptive perfectionism positively predicted social cohesion for unclassified athletes. Meanwhile, the perfectionist concerns traits of poorly adaptive perfectionism can negatively predict social and task cohesion, with the exception of “perceived parental pressure” which showed a positive prediction in all groups of athletes for social and task cohesion. Unclassified athletes had a higher perception of cohesion for the task, while reserves had a higher perception of social aspects. Thus, we can conclude that there is a positive relationship between adaptive perfectionism and the perception of social cohesion in unclassified athletes, in addition to a negative relationship between the dimensions of poorly adaptive perfectionism and group cohesion.O objetivo desse estudo transversal foi investigar a relação entre os traços de perfeccionismo e a percepção de coesão de grupo em atletas de futsal. Participaram 301 atletas da Liga Nacional de Futsal 2013 com média de idade de 25,48±4,90 anos. Os instrumentos foram: Escala Multidimensional de Perfeccionismo para o Esporte-2 e o Questionário de Ambiente de Grupo. Para análise foi conduzida por meio dos testes de Kolmogorov-Smirnov, MANOVA, Correlação de Pearson e Regressão Múltipla (p<0,05). Os resultados evidenciaram que os traços de perfeccionismo adaptativo se associaram positivamente com a coesão social dos atletas das equipes não classificadas para a fase final da competição. Os traços de perfeccionismo mal adaptativo se associaram negativamente com a coesão social e para tarefa, com exceção da “pressão parental percebida” que apresentou uma predição positiva em todos os grupos de atletas na coesão social e para tarefa. Os atletas não classificados apresentaram maior escore de coesão para tarefa, e os reservas apresentaram maior coesão social. Concluiu-se que existe uma relação positiva entre o perfeccionismo adaptativo e a percepção de coesão social em atletas não classificados, além de uma relação negativa entre as dimensões de perfeccionismo mal adaptativo e a coesão de grupo