04.1 - Graduação (UAG)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2948
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Resultados da Pesquisa
Item Qualidade fisiológica de sementes crioulas de feijão-de-corda do Estado de Pernambuco(2019-08-23) Noronha, Sabrina Porto de; Moser, Luciana Maia; http://lattes.cnpq.br/5884448493094899; http://lattes.cnpq.br/7898320104487689The physiological quality of seeds is one of the factors responsible for the good development of the plant in the field. In addition, stress conditions (such as saline and water) during the germination phase can also affect seedling emergence and consequently the vegetative development of crops. Therefore, this work aimed to study the physiological quality of black bean seeds from Pernambuco State. These seeds were supplied by farmers and / or associations of farmers from Agreste and Sertão Pernambuco, the experiments were carried out at the CENLAG Plant Production Laboratory of the Garanhuns Academic Unit. The evaluation of seed biometrics was performed by measuring length, width and thickness. In addition to these parameters, the weight of 100 seeds and the water content were also measured. The physiological quality of the seeds was measured by germination parameters (IVG,% of germination and effect of water and saline stress on germination), as well as seedling length and dry mass. Creole seed samples of string beans from the municipalities of Canhotinho, Sao Joao, Garanhuns, Jucati, Brejinho and Serra Talhada were heterogeneous in color and size. The sample from Garanhuns presented the highest water content (15.05) and the smallest from Brejinho (2.56). In the germination percentage, there was variation using the two parameters (radicle emission and normal seedlings), where the sample of the municipality of Brejinho presented the best germination results (100% considering the radicle emission and 20% considering normal seedlings). Garanhuns and São João samples presented the worst 84% considering radicle emission and 1% considering normal seedlings respectively. The samples that were most affected by water and saline stress in germination and IVG of normal seedlings were from São João and Garanhuns, which did not obtain normal seedlings. Seedling growth was affected by saline and water stress, which caused reduction in shoot and root length, being the most severe salt stress. The seedlings from the Canhotinho sample are the most sensitive to saline stress in relation to shoot length and shoot and root dry mass.Item Estresse salino e biofertilizante no crescimento inicial do tomateiro(2018-08-24) Silva, Tamires Fernanda da; Alves, Samara Sibelle Vieira; http://lattes.cnpq.br/7447103801683932The tomato (Lycopersicon esculentum Mill.) Is one of the most known and consumed vegetables in the world. It can be used in both raw and processed food in the form of sauces, ketchup, extract, dehydrated tomatoes, etc. In some regions of the Northeast, as the semiarid climate prevails, the water in most of these regions is saline, but the only one available for use in agriculture. Studies on the use of biofertilizers as attenuators of the effect of salinity on plants are promising, since tomato is considered moderately tolerant to salinity. In view of the above, this work aimed to evaluate the tolerance of tomato to different levels of salinity in the irrigation water associated to the use of bovine biofertilizer. For this experiment the cherry tomato cv. Fern of TopSeed Garden. The experimental design was completely randomized with four treatments, in the presence and absence of biofertilizer and four replications. The research was carried out in greenhouse at the Garanhuns Academic Unit - UFRPE. The plants were watered with water of different levels of salinity 0.5; 2.48; 4.88; 8.7 dS m-1, obtained by mixing saline water and urban water supply and the same salinity levels with the addition of 5% biofertilizer. The plants were watered maintaining the field capacity. The characteristics evaluated biweekly were: stem diameter, leaf number, plant height, leaf area, LAI, AFE, RAF, and chlorophyll A and B contents. These characteristics will be evaluated every 15 days. Growth was reduced with increasing salinity of irrigation water. The cherry tomato cv. Samambaia was more tolerant to salinity than the literature suggests. The use of the biofertilizer presented small effects as an attenuator of the saline stress.Item Influência de fatores abióticos sobre o desenvolvimento de bactérias promotoras de crescimento vegetal dos gêneros Bacillus e Pantoea(2019-02-05) Amorim, Alyson da Silva; Sobral, Júlia Kuklinsky; http://lattes.cnpq.br/8273377142633220; http://lattes.cnpq.br/9204041210789535Incorrect handling during the application of most agricultural pesticides has been causing contamination in soils, groundwater, fauna and flora in Brazilian agroecosystems, in addition to increasing costs in agricultural production. The microbiota when subjected to dosages above the recommended level of certain pesticides suffers deleterious effects on their populations. And as a way to reduce input costs and the search for more sustainable agricultural production, the use of growth promoting bacteria and bioremediators is a biotechnological tool of great potential. Another factor that influences agricultural production is salinity. It is a term that qualifies a situation of excess soluble salts in the environment. This problem is one of the main causes of soil degradation in regions of arid and semi-arid climate, culminating in serious agricultural income. To contribute to the recovery of these degraded soils, plant growth promoting bacteria have been shown to be useful in the development of strategies to promote plant growth in saline soils. In view of the above, the present work had as objectives: i) to evaluate the tolerance to the methomyl pesticide and the potential biodegradation capacity of this pesticide by Bacillus plant growth promoting bacteria; and ii) to evaluate the production of exopolysaccharides under saline stress by plant growth promoting bacteria of the genus Pantoea. For the evaluation of pesticide tolerance, the Bacillus bacteria (UAGAT35 and UAGAT71). were inoculated in modified Minimal Mineral Medium (MMM), plus glucose as carbon source, followed by different concentrations of Methomyl. And to assess the potential for biodegradation, the carbon source has not been increased. In the experiment on salinity, five bacterial strains of the genus Pantoea were used (UAGC 906, UAGC 977, UAGC 858, UAGC 907 and UAGC 972), which were grown in solid medium with sucrose and added different concentrations of NaCl in each tr. For 10 days, the growth of the halo was measured with the aid of a pachymeter, being done five readings, in intervals of 48 hours. The two strains of the genus Bacillus demonstrated tolerance and biodegradation to methomyl insecticide, in their different concentrations. While the 5 bacterial strains of the genus Pantoea submitted to the different concentrations of NaCl presented production of Exopolysaccharides (EPS), showing their survival in environments under IX salt stress. Therefore, the evaluated bacteria presented potential for future studies aiming to promote growth in adverse environments.Item Avaliação químico-bromatológica do milheto irrigado com água salina e cultivado com diferentes doses de gesso agrícola no Semiárido(2019-01-17) Miranda, Maria Beatriz Rodrigues de; Magalhães, André Luiz Rodrigues; http://lattes.cnpq.br/2621131411062422; http://lattes.cnpq.br/5983981030734778The objective of this study was to evaluate the chemical-bromatological composition of forage millet, submitted to doses of plaster irrigated with saline water. The study was conducted in Petrolina - PE, in the period of 140 days, with duration of 75 days for the first cycle and 65 days for the second. The experiment was carried out in a randomized block design with two replicates (1 and 2 cycles) and four doses of plaster (0, 2, 4 and 8 Mg ha-1) totaling 24 plots using the ADR 300 millet variety. No differences (P>0.05) were observed for plaster doses for any of the analyzed variables and in none of the cuts performed. No difference (P>0.05) was observed for dry matter (DM) values between the cuts with mean values of 261.2 g/kg natural matter (NM). There was an effect (P <0.05) between the evaluated periods and the relation to neutral detergent fiber (NDF), acid detergent fiber (FAD), crude protein (CP), ethereal extract (EE) and lignin (LIG). Results were higher in the second cycle (75 days) of the constituents NDF (606.4), FDA (331.6) and LIG (38.0) compared to the first cycle (65 days) with values of 576.3, 267.5 and 30.4 g/kg DM, respectively. It was observed that the values referring to PB (159.7) and EE (17.3) were higher in the first cycle in relation to the second with results of 106.1 and 14.0 g/kg DM, respectively. The level of application of plaster did not differ for both cuts, however, there was nutritional difference between them, where the first cycle showed to be nutritional superior to the second cycle when irrigated with saline water.