TCC - Bacharelado em Agronomia (UAST)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/2928
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Resultados da Pesquisa
Item Aspectos do crescimento da Baraúna (Schinopsis brasiliensis Engel.), em diferentes contextos de intervenções antrópicas, na comunidade da Mata Redonda em Triunfo – PE.(2022-05-27) Santos, Natália Alves; Barros Júnior, Genival; http://lattes.cnpq.br/4379675294862211; http://lattes.cnpq.br/4530134000429562The Caatinga vegetation has a very peculiar characteristic, which makes it unique and, unfortunately, due to anthropic actions, a considerable portion of this biome is in extinction and another portion is threatened with extinction. Among the endangered plant species is the Baraúna (Schinopsis brasiliensis Engl.), one of the most important trees in the Caatinga, considered a noble tree due to the characteristics present in its wood. Given this situation, research actions aimed at preventing the extinction of the Baraúna species are shown to be of great importance for the preservation of biodiversity in the Caatinga Biome. However, there are still few studies aimed at rescuing and protecting the dynamics of this important species in the Caatinga vegetation. Thus, the objective of the present work was to study the initial behavior and to relate the growth rates of Baraúna plants introduced in areas under different impacts arising from agricultural management over time in environmental conditions of high-altitude swamp. 10 The experiment was carried out in a Random Block Design - DBC, in an 11 x 3 arrangement (11 baraúna plants in 3 different areas of human intervention) area 1- degraded soil; area 2- arable soil; area 3- agroforestry system, carried out from October 2021 to March 2022. Soils were collected for analysis, rainfall data, luminosity data, soil cover and monthly biometric readings. In area 1, the soil was classified as sandy clay, compacted, low rate of living and dead cover, accentuated presence of erosive processes, high presence of luminosity and average growth of baraúnas when compared to the other areas; area 2- clay soil, compacted, high presence of living cover, medium presence of mulch, presence of erosive processes, high level of luminosity and it was the area in which the plants showed the highest growth in terms of stem diameter as in vertical growth; and in area 3 soil classified as sandy clay loam, not compacted, high index of living and dead cover, punctual erosion processes, low luminosity and slow growth of baraúnas. The baraúna plants are demanding in light, requiring full exposure of the canopy of their canopy to solar radiation to ensure a satisfactory development of the individuals of their species. The reintroduction of the species Schinopsis brasiliensis in the ecosystem of highland swamps is recommended due to its ecological, environmental and anthropological importance for the enrichment of local biodiversity.Item Diagnóstico ambiental por índices de vegetação no Parque Estadual Mata da Pimenteira no período chuvoso e seco(2022-05-23) Rocha, Alessandro Higor Gomes da; Bezerra, Alan Cézar; http://lattes.cnpq.br/3690303625468223; http://lattes.cnpq.br/1372320248183121Due to the monitoring needs, as well as the understanding of the vegetation conditions of the Mata da Pimenteira State Park, it was aimed to analyze vegetation indices generated with red and infrared bands, with Sentinel-2 images to verify the land cover in the rainy and dry period from 2016 to 2021. The study site is located in the municipality of Serra Talhada, Pernambuco. The images were processed in Google Earth Engine to obtain a composition of the two periods studied, then, in QGIS software version 3.18.3 (Zurich), the vegetation indices (NDVI and VCI) were determined by raster calculator, a calculation tool available in Qgis that uses as a basis the values of the pixels of the layers. After obtaining the indices, the descriptive statistics of the images were obtained and classified using the r.recode tool, with subsequent counting of the vegetation classes by r.report, so that from this, the thematic map for the analysis and diagnosis of the study area was made. The results indicate higher average NDVI for 2016 and 2017 with 0.7 in the rainy period, and 0.36 in the dry one. The VCI had its highest average in 2016 with 86.04 and lowest in 2018 with 63.63. In the rainy period more than 90% of the area was composed of the high vegetation density with the NDVI and VCI of the very light class. In the dry period, most of the area was of the class "low vegetation density" by NDVI and "severe" by VCI.Item Contribuição da condutância estomática de grupos funcionais de plantas lenhosas na condutância do dossel em vegetação de Caatinga(2022-05-23) Jesus, Angela Lucena Nascimento de; Lima, André Luiz Alves de; http://lattes.cnpq.br/3425654823765293; http://lattes.cnpq.br/3432981548836565The arboreal species of semiarid regions contribute in different ways to the cooling of the canopy, considering the diversity of species and functional groups of plants. Although the vegetation-atmosphere relationship is important from the point of view of climate change, studies evaluating the contribution of caatinga functional groups to the canopy conductance are still scarce. The objective of this study was to evaluate the relation of the stomatic conductance of different functional groups of plants with the conductance of the canopy in Caatinga vegetation. The work was carried out in an area of the Caatinga, located in Fazenda Buenos Aires, Serra Talhada- PE. Two species of high wood density (WMD) and two species of low wood density (WDL) were evaluated. The meteorological data were obtained from a micrometeorological station installed in the study area and the canopy conductance was calculated. The stomatic conductance, leaf temperature and hydrous potential of xylem were evaluated. Stem samples were collected and anatomical structures of the xylem were measured. Analysis of variance of repeated measures and Tukey test with p < 0.05 were performed. Functional groups contributed differently to the canopy conductance. There was a positive relation of the canopy conductance and stomatal conductance (0.761). In the initial rainy season, the canopy conductance was 0.003 m s-1 , with the largest contribution to the canopy conductance occurring by the WMD species (150 mmol m-2 s -1 ). In the rainy season the species' stomatal conductance increased for WMD (100 to 300 mmol m-2 s -1 ) and WDL (200 to 300 mmol m-2 s -1 ). The canopy conductance also increased during the rainy season (0.02 and 0.05 m s-1 ). The water potential was higher for WDL (-1.2 MPa) and lower in WMD (-2.5 MPa) species. The WMD species presented greater amount of xylem vessels (58 mm-2 ) and wall thickness (16 ), and smaller diameter of the lumen of the xylem vessels (140 ). The WDL presented thin wall (9 ) and smaller amount of vessels (5 mm-2 ). These results show that, WMD species have strategies that favor the canopy conductance, even in the dry season, while WDL are more conservative and contribute to the canopy conductance in the rainy season. This study clarifies the importance of functional diversity for maintaining water and environmental balance in semi-arid regions, such as the Caatinga.