TEDE Communidade:

Monitoramento nutricional da dieta de pequenos ruminantes utilizando espectroscopia da reflectância do infravermelho próximo (NIRS) no sertão de Pernambuco

Fri, 26 Feb 2016 00:00:00 GMT

Título: Monitoramento nutricional da dieta de pequenos ruminantes utilizando espectroscopia da reflectância do infravermelho próximo (NIRS) no sertão de Pernambuco Autor: MACIEL, Michel do Vale Primeiro orientador: BATISTA, Ângela Maria Vieira Abstract: The objective was to monitor the nutritional value of small ruminant diet using spectroscopic reflectance near-infrared (NIRS) and characterize grazing Caatinga. The survey was conducted from january to december 2014, at the Estação Experimental in Sertânia, belonging to Instituto Agronômico de Pernambuco –IPA, in the municipality of Sertânia, Pernambuco (PE), in an area of 37 hectares of Caatinga. In the experimental area, seven parallel transects strokes. They were marked in each transect evaluation points every 20 meters, totaling 136 points of evaluation of botanical composition, availability of strata and taking samples for chemical composition. To determine the nutritional value of the diet, it was used five sheep and six goats, all with permanent fistula in the rumen and average weight of 32,35 + 2,37 and 32,68 + 1,14 kg, respectively. The animals were loose in the pasture 7:00 hours and 17:00 hours collected, received mineral salt and water ad libitum for five consecutive days each month of collection. The total production of feces was obitida by total collection utilizandos bags adapted to animals. The dry matter intake was obtained by the inverse calculation of digestibility: Consumption (kg DM / day) = fecal production / (1-digestibility). The CMS was calculated from other inputs MO, MM, FDN and FDA by multiplying the amount of dry matter consumed by the percentage of each nutrient extrusa. To obtain spectra of the samples was used FOSS 5000 Nirsystem II machine using ISIScan® software. Foss 5000, with reading in a range from 1100 to 2500 nm in the near infrared region, with 2 nm spectral range. Were scanned in all fecal samples 660, 360 with respect faeces of 300 goats and ovine species for obtaining the spectra. They were calibrated prediction equations for a Global Model (goats and sheep in different seasons) model using composite samples, separating species (goats and sheep), separating the seasons (rain, trasição dry rain, drought and trasição dry rain) and separating species insides of seasons (dry and wet). The near-infrared spectroscopy (NIR) provides good accuracy to determine the composition of PB and DIVMO the lies of small ruminant grazing in the Caatinga. The floristic composition of the Caatinga has large amounts of plant species, mostly endemic plants. The availability of biomass and chemical composition vary directly by the presence or absence of rain and decreasing or increasing the disponibinilidade and the chemical composition of all strata. In vitro dry matter digestibility and in vitro digestibility of organic matter to lay the sheep are larger than the goat when grazing in the Caatinga, in the months of highest incidence rainfall and are influenced by the absence of rain, the sheep, there is more variation throughout the year than the goat. The protein content of the diet of sheep and goats grazing in the Caatinga are above the minimum, described for these species, with much of this nitrogen connected to fiber. The use of a global model for both species, in different seasons (rain, TCS, Drought and TSC) is considered feasible to predict the diet of small ruminants in the Caatinga due to greater robustness of the model. The fecal NIRS technology proved to be a great alternative to partial substitution of fistulated animals in sample collection, since the calibration is done correctly. Even in heterogeneous environments such as Caatinga, the NIR has proven effective, with the limit of its use sampling in the calibration. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Tese

Utilização de feno ou silagem de maniçoba em substituição ao feno de Tifton 85 na alimentação de ovinos

Sun, 16 Dec 2012 00:00:00 GMT

Título: Utilização de feno ou silagem de maniçoba em substituição ao feno de Tifton 85 na alimentação de ovinos Autor: MACIEL, Michel do Vale Primeiro orientador: CARVALHO, Francisco Fernando Ramos de Abstract: The objective was to evaluate the subsitution of Tifton 85 hay (Cynodon sp.) For hay or silage (Manihot sp.) In diets without defined breed growing on weight gain, carcass yield and commercial cuts. We used 24 (twenty four) animals, with initial weight of 19.77 ± 1.95 kg and average age of six months, distributed in a randomized block design. The total duration of the experiment was 71 days, 15 days for diet adaptation and 56 for data collection. There was no difference in crude protein (P> 0.05) difference was found for the consumption of neutral detergent fiber between treatments (P <0.05) with lower consumption found for treatment with silage Maniçoba. Animals fed diets containing hay maniçoba had higher dry matter intake (P <0.05). Weight gain, feed conversion ratio was similar among treatments. The mean weight gain was 153.3, 156.9, and 135.3 g / day, respectively, for diets containing Tifton hay, hay and silage maniçoba. There was no significant difference (P> 0.05) for carcass weight and yield, loss of cooling (LC) and true yield (RV) between treatments. There was no difference in the yields of cuts (%) by the use of hay or silage to replace Maniçoba of Tifton. There was also no significant difference (P> 0.05) for the morphometric measurements of carcass. The hay and silage can replace Maniçoba Tifton hay in sheep feeding finishing without compromising weight gain, feed conversion, carcass yield and carcass characteristics. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação

Crescimento de mudas de Erythrina velutina Willd. sob fertilização potássica na fase de rustificação e restrição hídrica

Thu, 27 Feb 2025 00:00:00 GMT

Título: Crescimento de mudas de Erythrina velutina Willd. sob fertilização potássica na fase de rustificação e restrição hídrica Autor: PUNDRICH, Maria Gabriella Rodrigues Primeiro orientador: FREITAS, Eliane Cristina Sampaio de Abstract: Water is a vital resource for the development of all living beings, especially plants, and is essential for physiological processes such as photosynthesis and nutrient absorption. Currently, low water availability is a common problem worldwide, and this situation has worsened with climate change, limiting the establishment of forest species. Applications of potassium fertilizer can reduce the impact of water deficit on the initial growth of seedlings, increasing their efficiency in water use. In this context, the objective of this study was to evaluate whether the application of potassium fertilizer during the rust phase reduces the stress caused by water deficit in Erythrina velutina Willd. seedlings. The experiment was conducted in a greenhouse at the Forest Nursery of the Federal Rural University of Pernambuco (UFRPE). The experiment was carried out in a completely randomized design (CRD), in a 4 x 3 factorial (4 K rates: 0, 100, 200 and 300 mg dm-³) and 3 types of daily irrigation (ID - daily application, I7 - application every 7 days and I14 - application every 14 days). Sowing was carried out in 288 cm³ tubes, and after 15 and 30 days after sowing, topdressing fertilization with macro and micronutrients was performed. When the seedlings reached 15 cm in height, a rust fertilization was performed with K rates, divided into 3 applications, every 7 days. After 15 days of the last potassium fertilization of rust, the seedlings were transplanted to 5 L pots. At 111 days after sowing (DAS), another potassium fertilization was performed divided into 3 applications, every 7 days. After 15 days of the last application, changes were imposed on the water conditions according to the safety treatments. The following morphological variables were verified: height increase (IP), stem diameter increase (IDC), number of leaflets, dry matter mass of the aerial part (MSPA), root (MSR) and total (MST), main root length (CRP), leaf area (AF), dry matter ratio of the aerial part/root (MSPA/MSR), Dickson quality index (IQD) and stomatal density; physiological results: chlorophyll indices, relative water content (TRA) and damage to cell membranes; and biochemical variables: chlorophyll and carotenoid content, hydrogen peroxide (H2O2) concentration, malondialdehyde and K content in the leaves. The data obtained were subjected to analysis of variance (ANOVA), test of means, regression analysis at 5% significance, and principal component analysis (PCA). The ideal transparency for the growth of changes is daily productivity, since there was a reduction in growth and dry matter production when water was limited. Potassium fertilization did not influence height growth, but increased root length, leaf area, chlorophyll content, cell damage and hydrogen peroxide content. The application of a dose of 200 mg dm-³ of potassium is indicated to improve photosynthetic capacity, carotenoid content, reduction of oxidative stress and greater leaf area, which may influence greater tolerance to water stress in E. velutina seedlings. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação

Conhecimentos profissionais de futuros professores de matemática sobre as propriedades da igualdade : um processo formativo mediado por tarefas de aprendizagem profissional

Tue, 12 Dec 2023 00:00:00 GMT

Título: Conhecimentos profissionais de futuros professores de matemática sobre as propriedades da igualdade : um processo formativo mediado por tarefas de aprendizagem profissional Autor: SILVA, Samuel Ribeiro da Primeiro orientador: ALMEIDA, Jadilson Ramos de Abstract: In this research, we seek to understand the professional knowledge of future mathematics teachers about the content and teaching of the properties of equality for the 6th year of Elementary School. With a qualitative and interpretative approach, along the lines of an intervention research, we adopted the Mathematics Teacher's Specialized Knowledge (MTSK) as a theoretical framework and in the analysis of descriptive data, which assumes that the professional knowledge of the mathematics teacher is specialized. Data production took place through a training process mediated by a Professional Learning Task (TAP) and orchestrated by the Professional Learning Opportunities (OAP) model, whose acronym in English is PLOT (Professional Learning Opportunities for Teachers). Data come from audio recordings, written records and discursive interactions that took place during the training course, in which 19 Mathematics undergraduates participated in the exploratory phase (questionnaire) and six, in the training period. All were taking the Mandatory Supervised Internship III (ESO III) course at a public university in the state of Pernambuco, with the course teacher also participating (trainer teacher). The results showed evidence that undergraduates have, in relation to the properties of equality: knowledge of mathematical content (KoT), although they do not frequently use the notion of equivalence in solving mathematical tasks; knowledge of the structure of Mathematics (KSM), when they identify connections with past and future contents; knowledge of mathematical practice (KPM), evidenced at various times; knowledge of mathematics learning characteristics (KFLM), as they try to interpret students' errors and obstacles; knowledge of teaching mathematics (KMT), even though they do not know many digital resources for teaching; knowledge of the parameters of mathematics learning (KMLS), when they identify the levels of education relating them to the proposed task, however, there is a gap with regard to the knowledge of the official curriculum documents, as verified in the analysis of the previous questionnaire. Furthermore, we confirmed the formative potential of the Professional Learning Tasks (TAP) to promote the Professional Learning Opportunities (OAP), considering that, through reflections around the proposed task, discursive interactions and mediation by the trainer teacher, future teachers revealed to improve their knowledge. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação