The salinity is considered one of the main obstacles to agriculture worldwide, constituting one of the limiting factors to the growth and development of the plants. The objective of this study was to evaluate the effects of salinity of irrigation water in the formation of seedlings two varieties of jackfruits, and with the application of common bovine biofertilizer and chemically enriched bovine biofertilizers. In this sense, an experimente was carried in greenhouse conditions, in the period from October 2015 to February 2016, in Areia County, Paraiba State, Brazil. The substrate used was a material collected of the first 10 cm of depth of a Dystrophic Regolitic Entisol. The experimental design was completely randomized in a factorial scheme 5 × 3 × 2, corresponding to levels of irrigation water saline of 0.5; 1.0; 2.0; 3.0 and 4.0 dS m-1, in soil without and with common bovine biofertilizer and enriched biofertilizer, tested with two varieties of jackfruit (jack-soft and jack-hard), and with six replicates. The biofertilizer after dilution in non-saline water (0.5 dS m-1), in proportion of 1:3, where was applied once to 10% of the substrate volume, two days before sowing. The increment of irrigation water salinity inhibited alls variables studied in the jackfruits plants, but with less intensity in the treatments with bovine common biofertilizer.
The correct management of organic fertilization has been shown as an extremely viable alternative in the production of vegetables, providing high yields concomitant to the reduction of synthetic fertilizers. The improvement of the production can be interpreted by the physiological behavior, favored by the organic fertilization with the supply of nutrients. Thus, an experiment was carried out to evaluate the gas exchange and Soil-Plant Analyses Development (SPAD) chlorophyll content in tomato plants according to types of organic fertilizers and biofertilizer doses. The experimental design was completely randomized with treatments distributed in factorial arrangement (3 x 5), referring to organic fertilizer types (T1: earthworm humus; T2: goat manure and T3: cattle manure) and biofertilizer concentrations (600, 800, 1000, 1200 and 1400 ml), with four replications. The gas exchange and the SPAD chlorophyll content in tomato plants depend on the type of organic fertilizer and the concentration of biofertilizer. It was possible to observe that increasing doses of biofertilizer in the substrate with low organic concentration increase the gas exchange in tomato plants, while high doses together with more concentrated organic fertilizers reduce these characteristics.
RESUMO: O girassol é uma espécie vegetal com inúmeras aplicações, apresentando grande potencial para a produção de energia renovável. Apesar de existir informações na literatura, as necessidades hídricas e o comportamento de cultivares de girassol ainda não estão perfeitamente definidos, principalmente no Nordeste do Brasil. Objetivou-se, assim, com este trabalho avaliar características do crescimento, desenvolvimento e produção de cultivares de girassol submetidas a diferentes regimes hídricos. O trabalho foi realizado em delineamento inteiramente casualizado em esquema fatorial 3 x 4, sendo três cultivares (BRS Gira 26, Agrobel 962 e Embrapa 122 V-2000) e quatro níveis de irrigação (40, 60, 80 e 100% do conteúdo de água na capacidade de campo), com quatro repetições. Foram avaliadas as características: altura de plantas, diâmetro do caule, área foliar, início do florescimento, maturação fisiológica, fitomassa da parte aérea, número de aquênios e peso de aquênios. A reposição hídrica com 100% da água disponível apresentou maior altura de planta, diâmetro do caule, área foliar, fitomassa e, número e peso de aquênios, destacando-se a Agrobel 962 para a maioraia das características. Lâminas de irrigação de 635,5; 603,7 e 546,2 mm, equivalentes a 100% da capacidade de campo, proporcionam melhores respostas de crescimento, desenvolvimento e produção das cultivares BRS Gira 26, Agrobel 962 e Embrapa 122 V-2000, respectivamente.ABSTRACT: The sunflower is a species with numerous applications, presenting great potential for production in energy replaceable. Although there exist bibliographic citations on the hydric needs and cultivars behavior of sunflower, still information, mainly for the North East of Brazil, is scarce. The objective of this study was to evaluate the growth characteristics, development and production of sunflower cultivars under different water regimes. The experiment was conducted in a completely randomized design in a factorial 3 x 4, comprising three cultivars (BRS Gira 26, Agrobel 962 and Embrapa 122 V-2000) and four irrigation levels (40, 60, 80 and 100% of the field capacity soil water content) with four repetitions. They were evaluated the characteristics: plant height, stem diameter, leaf area, early flowering, physiological maturity, shoot biomass, number achenes and weight of achenes. The replacement of water with 100% of the available water presented more plant height, stem diameter, leaf area, biomass and number and weight of achenes, standing out the Agrobel 962 for most of characteristics. Irrigation depth of 635,5; 603,7 and 546,2 mm, equivalent at 100% the capacity field, provide best answers the growth, development and production cultivars of sunflower BRS Gira 26, Agrobel 962 and Embrapa 122 V-2000, respectively.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.