The correct irrigation frequency relies on the plant population density to increase yield and efficiency in water use. A field experiment was carried out in 2019 to study the effect of three irrigation frequencies, one (F1), four (F2), and eight (F3) days, and four planting densities, 20 (D1), 24 (D2), 28 (D3), and 30 (D4) plants per m2, on the variables: soil moisture, actual water consumption, growth, grain yield, and water productivity of beans (Phaseolus vulgaris L.). The soil water balance was calculated based on the soil moisture, which was measured by tensiometers. The irrigation was done by a drip tape. The variation in soil moisture was greatly influenced by irrigation frequencies and planting densities in F3. Plant growth was not affected by treatments. Irrigation frequencies and planting densities have deeply affected the biometric and chlorophyll synthesis traits of beans. The highest yields were found in the treatments F1D3 (2968 kg ha−1), F1D4 (2997 kg ha−1), and F3D3 (2946 kg ha−1). For water productivity, treatments with F1 irrigation frequency and the higher planting densities were more efficient in water use. Overall, the results are useful for technicians and farmers who work with irrigation management on beans.
Manejo sustentável de irrigação utilizando hidrogel no cultivo de calendula officinalis l Sustainable irrigation management using hydrogel in the cultivation of calendula officinalis l
RESUMO:A cultura do pimentão é uma das principais hortaliças produzidas no Brasil e vem aumentando sua produção pela sua facilidade de cultivo em pequenas áreas. Com a escassez de água potável, tornou-se mais frequente à utilização de água salina, geralmente obtidas de poços rasos, como alternativa na produção agrícola. Dessa forma, o objetivo da pesquisa é avaliar o efeito de diferentes níveis salinos, sobre a germinação e desenvolvimento inicial da cultura do pimentão. O trabalho foi realizado em quatro bandeja de polipropileno de 100 células, cada parcela representada por 12 células. Nesse trabalho foi utilizado o pimentão "all big" da empresa Feltrin, utilizando-se duas sementes por célula. O delineamento escolhido foi DBC, constituído por cinco blocos e cinco níveis de salinidade (S1 = 0,14; S2 = 1,5; S3 = 2,9; S4 = 4,3; S5 = 5,7 dSm -1 . Após a coleta dos dados, realizou-se a análise estatística através do programa estatístico R e a mesma demonstrou efeito significativo para as variáveis: Massa PALAVRAS-CHAVE:Capsicum annuum L., Qualidade de água, Germinação. EFFECT OF SALINITY IN THE PRODUCTION OF BELL PEPPER SEEDLINGS ABSTRACT:The bell pepper culture is one of the main vegetables produced in Brazil and has been increasing its production by its ease of cultivation in small areas. With the shortage of drinking water, it has become more frequent to use saline water, usually obtained from shallow wells, as an alternative in agricultural production. Thus, the objective of the research is to evaluate the effect of different salt levels, on the germination and initial development of the bell pepper. The work was performed on four 100 cell polypropylene tray, each plot represented by 12 cells. In this work, the "All big" bell pepper of the Feltrin company was used, using two
Efeito da salinidade na produção de mudas de pimentão Effect of salinity in the production of bell pepper seedlings
The objective of this research was to characterize the production of lettuce under different layers of water and levels of bovine manure. The experiment was carried out at UFAL, Campus de Arapiraca. The design was completely randomized, arranged in a 5 x 6 factorial, with three replications.The treatments consisted of five water depths (L): 50, 75, 100, 125 and 150% of the crop evapotranspiration (ETc) and six levels of bovine fertilization: 0 (control), 50, 75, 100, 125 , and 150% of the recommendation. The localized drip irrigation system was used. At 30 days after transplanting, the harvest was performed. The data were tabulated and submitted to analysis of variance by the F test (p <0.05) by the software R. The water depth factor influenced the chlorophyll index a. There was interaction between the factors for water productivity. The efficiency in the use of organic compost was influenced by the addition of fertilizer.
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