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 fisiológicos de sementes de Piptadenia moniliformis Benth(2019) Silva, Joyce Naiara da; Silva, Monalisa Alves Diniz da; http://lattes.cnpq.br/0446410743186066; http://lattes.cnpq.br/3432689640499564With the increasing demand for seeds of high quality native forest species, mainly to support the work of mixed reforestation, it is fundamental that the methods of quality evaluation of the seeds are efficient, so the present work aimed to evaluate aspects pertinent to the physiological quality of seeds of Piptadenia moniliformis Benth. (calico angus). Two experiments were carried out: experiment 1 -Use of seed dormancy overcoming treatments, where they were immersed in concentrated sulfuric acid by (zero -intact seeds, 5, 10, 15, 20 and 25 minutes). The design was a completely randomized design, with six treatments and five replicates of 20 seeds per treatment. Experiment 2 -Evaluation of the methodology of the accelerated aging test, that is, traditional methodology and that employing the use of saturated NaCl solution at 41ºC with periods of zero exposure; 24; 48; 72 and 96 h. Before and after each aging period, regardless of the method, the water content of the seeds was determined. After each treatment the seeds were submitted to electrical conductivity and germination tests. The design was completely randomized, in a 2x5 factorial scheme (methodology x exposure times), with four replicates of 25 seeds per treatment. To overcome seed dormancy there was no statistical difference between the times of 5; 10; 15; 20 and 25 minutes of immersion in sulfuric acid, but the time of 20 minutes provided a larger number of seeds with protrusion of the primary root. The different methods of accelerated aging, conventional and saturated solution, affected the physiological quality of seeds of Piptadenia moniliformis Benth., With the reduction of the germinative potential after 24 hours of exposure. Regarding the methodology employed, the use of the saturated solution generally gave the best results, as the water content of the seeds was lower, thus reducing fungal growth. The results obtained in the biochemical test of electrical conductivity showed that the increase of the aging period, independent of the methodology, caused the increase of the deterioration of the seeds. It is soon concluded that the seeds of P. moniliformis Benth. had their dormancy overcome when immersed in concentrated sulfuric acid for periods of 5; 10; 15; 20 or 25 minutes; and that the different methodologies of accelerated aging, traditional and saturated solution, affected the physiological quality of the seeds.Item Adubação potássica em clones de palma forrageira(2019) Cirino Júnior, Baltazar; Leite, Maurício Luiz de Mello Vieira; Oliveira, Alexandre Campelo de; http://lattes.cnpq.br/8164135937542569; http://lattes.cnpq.br/4204641633941814; http://lattes.cnpq.br/4245406622322251The objective of this study was to evaluate the agronomic performance of Nopalea cochenillifera clones under different levels of potassium. Cladodes of forage palm were selected and collected (in the middle third of the plant), which was three years old, in the UAST experimental area. These cladodes went through a healing period of 10 days. They were then placed in pots (larger diameter) = 24 cm (smaller diameter) = 17 and 23 cm deep), with a capacity of 7 kg of soil, presenting deep drains, covering the bottom of the vessel with gravel to facilitate drainage. The experiment was arranged in a randomized block design in a 5x2 factorial scheme, using five levels of potassium (0, 250, 500, 750 and 1000 Kg.ha-1) and two forage palm clones (Giant Sweet and Sweet Child), with four replicates. Five biometric campaigns were carried out in August, September, October, November and December / 2018 to measure the plant height, length, width and thickness of cladodium, as well as the number of cladodes in order and totals . For the comparison test of means, only the data of the last campaign were used. The clones presented a similar response to potassium fertilization, presenting non significant results for fertilization levels. When comparing the two clones, there was no significant difference for all studied variables: plant height, number of cladodes, length, width and thickness of cladodes. Potassium fertilization does not influencethe morphological, productive and potassium parameters of plant tissues during the initial growth of the genus Nopalea. The software used was R-project version 3.5.0 and SigmaPlot 10.0.