Accumulation of macronutrients in different parts of sunflower fertilized with cassava wastewater

Silva²,

et al. 2019

Com. Sci.

This study aimed to evaluate the nutritional status of the sunflower (Helianthus annus L.) irrigated with domestic effluents. The study was performed in a pilot sewage treatment plant, where the treatments were composed by the combination of two factors: types of water (A1 - effluent treated by UASB reactor; A2 – effluent treated with digester decant and anaerobic filtering; A3 – effluent treated with anaerobic filtering; and A4 – water supply) and irrigation depths (L1 - equal to the crop evapotranspiration (ETc) and L2 – 1.2 ETc. The experimental design was in randomized blocks, in a 4 x 2 factorial scheme, with four replications. At 96 days after sowing, the leaves, capitulum, and achenes were collected for the concentration evaluation of N, P, K, Ca, Mg and S. The analyses of variance were performed based on the concentration of the nutrients in the respective organs; when significant, they were analyzed by orthogonal contrasts. The sunflower nutritional status was influenced by the types of treatment for the domestic sewage, especially regarding N, Ca and S, and by the irrigation depths; the sunflower crop presented a better nutritional balance when irrigated with treated domestic effluents; with the application of the water supply only, the nutritional supply of the P and S, is necessary.

Section: Resultsmentioning

confidence: 99%

Sunflower nutrition irrigated with domestic sewage treated

Silva²,

et al. 2019

Com. Sci.

“…These authors verified increases in the sunflower head diameter due to the application of doses of organomineral fertilizer. Likewise, some organic sources show positive effects, such as the cassava wastewater (manipueira) in sunflower (Dantas et al, 2016) and the bovine biofertilizer in melon plants (Santos et al, 2014) Similar to the sunflower head diameter, the model that best fit for the head dry mass was the linear one for the treatments fertilized with the organic and mineral fertilizers and quadratic polynomial model for the control treatment,…”

Section: Svmentioning

confidence: 99%

Irrigation and organic and mineral fertilization in sunflower crop

et al. 2018

The amount of available water to certain crops can play a direct influence on the expected effect of the application of fertilizers, whether mineral or organic origin. Thus, this work was performed in order to evaluate the effects of the application of different irrigation depths and organic and mineral fertilizers in the development and production of sunflower plants in Ceará state, Brazil. The experiment was carried out in full sun in pots containing Alfisol, in a completely randomized experimental design with a 5 x 3 factorial, five irrigation depths (L1 = 50%, L2 = 75%, L3 = 100%, L4 and L5 = 125% = 150% of the Class-A Tank evaporation ECA) and three fertilizations (F1 = organic, using aerobic fermentation of Bovine biofertilizer, F2 = mineral fertilizers, NPK-based and F3 = control without an addition of fertilizers with five replications. At 65 days after sowing (DAS), the following characteristics were analyzed: number of leaves, stem diameter, and plant height. In the maximum development of achenes (about 90 DAS), the plants were harvested to determine the head diameter, dry mass of 1000 seeds, dry mass of sunflower head, seed dry mass and crop yield. The different depths applied causing a significant effect in all the sunflower crop yield parameters being as low as the effect of the applied lower depth. The application of biofertilizers in plants provided increments similar to those provided by the application of mineral fertilizers in stem diameter, dry mass of the sunflower head, the head diameter and seed dry mass under different irrigation depths. Since most applied irrigation depth (150% of the ECA), combined with the mineral fertilizer and bovine biofertilizer provided higher results in sunflower production.

Ciências Rurais Em Foco – Volume 6

“…Dentre esses nutrientes destaca-se o nitrogênio, um dos nutrientes requeridos em maior quantidade pela cultura sendo essencial ao seu crescimento e desenvolvimento, além de se destacar como constituinte de aminoácidos de proteínas que são fundamentais na formação de grãos (DANTAS et al, 2016). Outro elemento de grande importância é o potássio, este é um dos elementos que mais limita a produção sendo bastante móvel no solo, cujas principais funções na planta estão relacionadas aos processos de fotossíntese, translocação e balanço iônico (GALVÃO et al, 2013).…”

Section: Introductionunclassified

Flutuação populacional de ácaros associados ao pinhão-manso no Semiárido Pernambucano

Marques¹,

Matos²,

Oliveira³

et al. 2022

Modo de acesso: World Wide Web Inclui bibliografia 1. Agricultura 2. Meio Ambiente 3. Zootecnia 4. Ciências Agrárias I. REDIN, Ezequiel II. Título. CDD-630 Sônia Márcia Soares de Moura -CRB 6/1896 O conteúdo deste livro está licenciado sob a Licença de Atribuição Creative Commons 4.0. Com ela é permitido compartilhar o livro, devendo ser dado o devido crédito, não podendo ser utilizado para fins comerciais e nem ser alterada. O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos seus respectivos autores www.poisson.com.br