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Title: Desenvolvimento de cinco porta-enxertos cítricos e do enxerto variedade folha murcha em ambientes com diferentes níveis de sombreamento
Authors: Martins, Madles Queiroz
Keywords: Citros;Clorofila;Efeito da luz;Mudas;Citros;Chlorophyll;Effect of light;Seedlings
Issue Date: 22-Dec-2011
Publisher: Universidade Federal do Espírito Santo
Citation: MARTINS, Madles Queiroz. Desenvolvimento de cinco porta-enxertos cítricos e do enxerto variedade folha murcha em ambientes com diferentes níveis de sombreamento. 2011. 74 f. Dissertação (Mestrado em Fitotecnica; Recursos Florestais) - Universidade Federal do Espírito Santo, Alegre, 2011.
Abstract: The variation in light intensity on plants species can lead to different responses in their physiological, biochemical, anatomical and growth. The objective of this study was to evaluate the influence of environments with different levels of shading in the development of different rootstocks of citric and combination variety of rootstocks Rangpur lime grafted with a variety of orange tree withered leaves. With this purpose three experiments were conducted. In the first experiment evaluated the development of rootstocks on phase comprising the period from seed sowing to transplanting phase. The second experiment with the assessments for the period from transplanting to the point of rootstocks grafting. The third experiment evaluated the growth of the graft combination of variety on leaf wilt rootstocks Rangpur Lime. The first and second experiment were conducted on private property and located in the city of Alegre-ES, located at 20º 49 south latitude and 41º 32 west longitude and 322 m altitude. The third was installed at the Centro de Ciências Agrárias da Universidade Federal do Espírito Santo, located in the municipality of Alegre-ES, located at 20º 45 south latitude and 41º 32 longitude west of Greenwich e a 271 m de altitude. The design in the first and second experiments was completely randomized in a split-plot 4x5, four environments 0%, 30%, 50% and 80% shading and five varieties of rootstock (Rangpur Lime, Lemon Volkameriano, Poncirus Trifoliata, Flying Dragon and Citrumelo Swingle) with four repetitions and twenty-five seeds per plot in the first, and three plants per plot in the second experiment. In the third experiment was used a randomized design in which treatments were composed of four environments 0%, 30%, 50% and 80% shading, using him to wilt leaf variety rootstocks grafted on Rangpur Lime. In the first experiment were evaluated emergence percentage, emergence speed index, leaf of number, height, leaf area, shoot dry mass, dry mass of roots and total chlorophyll (a + b). In the second experiment were evaluated leaf area, leaf number, stem diameter at 10 cm of the collar, plant height, total chlorophyll (a + b) and dry mass of shoots and roots. In third were evaluated rootstocks diameter measured two inches from the point of grafting, the graft diameter 10 cm, length of the graft, leaf area, leaf number and dry weight of shoots. From sowing to transplanting the shading to 50% (average brightness of 249,06 mol m-2 s-1) provides greater strength to the seedlings. Rootstocks of the different varieties can be grown under the same conditions of shading. In the post transplanting and grafting the highest plant growth occurs in the absence of shading
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