Automatized irrigation systems under nursery conditions have become an essential tool to satisfy rationally the water needs for plants without forgetting the sustainability aspects. The present study aimed to evaluate two sprinkler irrigation systems under nursery conditions: one with fixed laterals (fixed system) and another with self-propelled laterals (mobile system) and study the effect of their use on the behavior of tree lettuce seedlings production. The experiment was conducted on a greenhouse with a polystyrene (PVC) plastic film coverture and laterals closed with 60% plastic screen. The statistical design used was a 2x3 completely randomized factorial with four replicates, and the results analyzed using the Tukey test. To compare the lettuce seedlings behavior under both irrigation systems it was evaluated the leaves number, seedling's height, root length and fresh and dry mass of the aerial and root part of the plant. The Christiansen uniformity coefficient (CUC) and the water distribution coefficient (WDC) for the fixed irrigation system were considered adequate and for the self-propelled laterals system (mobile system) they were considered excellent. The volume of water used with the fixed system was 109.12% higher than with the selfpropelled system. The lettuce seedlings irrigated with the self-propelled system had a growth, production and a seedling quality statistically superior than when irrigated with the fixed system. Independent of the irrigation system used, the Elizabeth lettuce cultivar had a greater seedling behavior. According with the results obtained, it is recommended the use of the self-propelled irrigation system (mobile system) on the production of lettuce seedlings.
Esse trabalho teve como objetivo analisar os características físico-químicas do sedimento do Açude de São José III, situado no município de São José dos Cordeiros no estado da Paraíba, bem como a pluviometria da região e o volume do manancial nos últimos 5 anos. Realizou-se a coleta do sedimento no Açude São José III, em três pontos distintos (A-Fundo do manancial; B-Margem do açude – depósito de resíduos; C-Margem do açude-área agricultável) a uma profundidade de 0-30 cm com auxílio de trado manual, pás plásticas e tubos de PVC (50 mm de diâmetro) e acondicionadas em sacos plásticos. Após a coleta, as amostras passaram por secagem ao ar, destorroadas e enviadas ao Laboratório de Irrigação e Salinidade (LIS-UFCG), para realização das análises física e químicas. Afirma-se com os dados pluviométricos o ano que apresentou a maior média foi o de 2009 (103,89 mm) e o de menor foi o de 2012 (16,59 mm). A análise granulométrica dos sedimentos revelou que o sedimento da amostra A (Fundo do Manancial) possui 50,06% de argila. As amostras de sedimento B (Margem do Manancial – Depósito de resíduos) e C (Margem do Manancial - Área agricultável) apresentaram uma fração de areia superior (B-80,74%; C-62,64%), na caracterização química percebeu-se que a razão C/N obtida nas amostras do açude São José III possuem origem de ambientes terrestres e aquáticos.Temporal variability of the volume and physical and chemical characterization of sediment weir São José III in Cariri ParaibanoAbstract: This study has how to objective to analyze the physical and chemical characteristics of the sediment of São José III, located in São José dos Cordeiros - PB, as well as the rainfall of the region and the volume of the weir the last 5 years. Held the collection of the sediment weir São José III, at three different points (A-Fund of the weir, B-border of the weir - waste disposal; C-Border of the weir - arable area) to a depth of 0-30 cm with the support of manual auger, plastic blades and PVC tubes (50 mm diameter) and packed in plastic bags. After collect, the samples passed air drying, broken into pieces and sent to the Laboratory of Irrigation and Salinity (LIS-UFCG), to peform the physical and chemical analyzes. Says with the rainfall data for the year with the highest average was 2009 (103.89 mm) and the lowest was observed in 2012 (16.59 mm). The particle size analysis of the sediment revealed that the sediment sample A (Fund of the weir) has 50.06% argil. Sediment samples B (Border of the weir – waste disposal) and C (Border of the weir - arable area) showed a higher sand fraction (B-80, 74%, C-62, 64%), realized that the chemical characterization to C/N ratio in the samples of the weir São José III have origin of terrestrial and aquatic environments.
Resumo: objetivou-se com este trabalho avaliar os efeitos da irrigação com água residuária doméstica tratada e da adubação com composto de resíduo sólido urbano na matéria seca de plantas de girassol. O experimento foi conduzido em casa de vegetação na Universidade Federal de Campina Grande -PB; a cultura utilizada foi o Girassol (Helianthus annuus L.), variável EMBRAPA 122/V2000, cultivadas em vasos preenchidos com solo classificado como Neossolo Regolítico eutrófico. O delineamento experimental foi em blocos inteiramente casualizados em esquema fatorial 6 x 2, com 3 repetições, que foram 6 doses de nitrogênio disponível em composto de resíduo sólido (0, 60, 100, 140, 180, 220 kg. N. ha -1 ) e 2 tipos de água (água de abastecimento e água residuária doméstica tratada). A água residuária foi tratada por meio de reator UASB (Reator anaeróbico de fluxo ascendente) e a água de abastecimento foi proveniente do sistema de abastecimento público municipal. Verificou-se que a qualidade de água influenciou a produção de massa seca da parte aérea a 5% de probabilidade; já a variação das doses de nitrogênio não exerceu efeito significativo para a variável analisada. Palavras-chave: reuso, composto de lixo, UASB.Abstract: is aimed with this work was to evaluate the effects of irrigation with treated domestic wastewater and fertilization with municipal solid waste compost on the dry matter of sunflower plants. The experiment was conducted in a greenhouse at the Federal University of Campina Grande -PB; culture used was the Sunflower (Helianthus annuus L.), variable EMBRAPA 122 / V2000, grown in pots filled with soil classified as eutrophic Entisol. The experimental design was randomized blocks in a factorial 6 x 2, with three repetitions, which were 6 levels of nitrogen available in compound of solid waste (0, 60, 100, 140, 180, 220 kg. N ha -1 ) and 2 types of water (water supply domestic wastewater and treated water). The wastewater was treated by UASB (upflow anaerobic reactor) and the water supply was coming from the municipal supply system. It was found that the water quality influenced the dry matter yield of shoot a 5% probability; since the variation of nitrogen doses no significant effect for the variable analyzed.
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