Qualidade de mudas de moringa sob diferentes níveis de nutrientes aplicados via fertirrigação

Montenegro

Rev. bras. eng. agríc. ambient.

et al. 2017

Efficient water use in agriculture is fundamental, especially in semi-arid regions where water scarcity is intense. The aim of this study was to estimate water requirements and crop coefficients in the different phenological stages of Moringa oleifera. The experiment was carried out from February to April 2015 at the Experimental Unit for Reuse and Hydrological Management, located in Mutuca, PE (7º 15’ 18’’ S, 35º 52’’ 40’’ W, 550 m). A lysimeter was used to estimate crop evapotranspiration. Reference evapotranspiration (ETo) was estimated by indirect methods. In the lysimeter, soil salinity and leaf water potential of the crop were monitored. The direct and indirect methods presented an excellent performance compared with the standard grass-lysimeter, especially Hargreaves-Samani, which presented a remarkable result for the study area. Crop coefficients (Kc) ranged from 0.73 to 1.73 in the different phenological stages. Moringa crop evapotranspiration (ETc) exhibited temporal variations, with a cumulative rate of 139.8 mm, for a cumulative reference evapotranspiration of 130.97 mm. Moringa plants showed slight water restriction, at the times of lower solar radiation.

Section: Bsupporting

confidence: 87%

Evapotranspiration and crop coefficients of Moringa oleifera under semi-arid conditions in Pernambuco

Montenegro

Rev. bras. eng. agríc. ambient.

et al. 2017

“…Gomes et al (2013) enfatizam que na utilização do Índice de Dickson deve-se ser aplicada com devida cautela, uma vez que este pode variar de espécie para espécie. Pereira et al (2016) avaliaram o desenvolvimento de mudas de Moringa oleífera, quando submetidas às diferentes concentrações de nutrientes na solução de fertirrigação, e não identificaram diferença significativa, onde as mesmas apresentaram uma média de IQD de 1,6.…”

Section: Resultsunclassified

Condicionamento De Mudas De Moringa a Diferentes Ciclos De Rega

Costa¹,

Almeida²,

Silva³

et al. 2019

Reveng

O objetivo deste trabalho foi avaliar o condicionamento de mudas de Moringa oleifera a diferentes ciclos de rega. Foi utilizado o delineamento inteiramente casualizado com cinco tratamentos: rega diária (RD); rega a cada cinco dias (R5D); rega a cada dez dias (R10D); rega a cada quinze dias (R15D) e rega a cada vinte dias (R20D), com cinco repetições por tratamento. O experimento teve duração de 60 dias e as variáveis avaliadas foram altura (H); diâmetro (DC); número de folhas (NF); peso da matéria seca das folhas (PMSF); caule (PMSC); raiz (PMSR); alocação da biomassa das folhas (ABF), do caule (ABC) e da raiz (ABR) e o índice de qualidade de Dickson (IQD). O estresse hídrico afetou o DC, NF, PMSPA, PMSC e PMSR, contudo não houve diferenças significativas para a H e ABR. O condicionamento hídrico por rega a cada 5 dias é o mais recomendado. No entanto, o ciclo de rega, até 20 dias, pode ser utilizado como técnica de rustificação para a produção de mudas de Moringa oleifera.

“…The technique of applying fertilizers via irrigation water is called fertigation and has great applicability in agriculture, especially in the production of fruits and vegetables (PEREIRA et al, 2016), but it is not limited to these crops. In this, the use of soluble formulations can be highlighted, which has advantages such as concentration and frequency that can be easily changed according to the requirements of cultivation, and its use is systematized according to the irrigation infrastructure, with the use of agricultural products such as urea, potassium chloride and simple superphosphate are a simple and easily acquired alternative to perform this activity (HOSHINO et al, 2016) Ion concentration of soil solution under fertigation conditions has been shortly studying.…”

Section: Introductionmentioning

confidence: 99%

Fertilizer concentration and fertigation frequency: effects on electric conductivity and ions concentration in the soil solution

Pereira

Coelho

Campos

et al. 2021

RCA

Fertirrigation allows total control of the amount of applied fertilizers to the soil as a function of crop demand. Fertigation relies on monitoring of soil ions to obtain the sustainability of soil chemical conditions. The continuous evaluation of ions in the soil solution also contributes to the estimation of the cycling rate of chemical elements and nutrient leaching in the field. The objective of this work was (i) to evaluate nitrate, potassium, sodium and electrical conductivity in the soil solution submitted to different concentrations of injection solution and fertigation frequency during one cycle of the "Grande Naine" banana in a non-cohesive Yellow Latosol and (ii) to evaluate the effects of concentration and fertigation frequency on yields of banana crop. The experiment was carried out according to a randomized block design with six treatments and four replications in a 3 x 2 factorial scheme with three concentrations of the injection solution (3, 10 and 15 g L-1) x two fertigation frequencies (3 and 7 days). The treatments influenced the values of the ion concentration in the soil solution in the soil profile corresponding to the depths of 0-0.30 e 0.30-0.60 m. The concentration of the injection solution and the interaction frequency x concentration influenced the electrical conductivity and nitrate concentration of the soil solution. There was no significant effect of the injection solution and fertigation frequency on production variables.