Nutritional status of coriander under fertigation depths and pulse and continuous drip irrigation

Abstract

<jats:p>ABSTRACT The objective of this study was to evaluate the nutritional status of coriander cultivar Verdão under fertigation depths and pulse and continuous drip irrigation. The experiment was conducted in a protected environment at the Universidade Federal Rural de Pernambuco, Recife, PE, Brazil (8° 1’ 6.50” S, 34° 56’ 46” W and altitude of 6.5 m), in the randomized block design in 2 x 5 factorial scheme, with three repetitions. Treatments consisted of five irrigation depths (40, 60, 80, 100 and 120% of crop evapotranspiration - ETc) and two types of fertigation application (pulse and continuous). At 27 days after sowing, the aerial part of 48 plants per plot was collected for subsequent quantification of nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, copper and zinc concentrations. Pulse fertigation combined with ETc replacement depths below 100% promoted higher leaf concentrations of phosphorus, sulfur, iron and manganese. Continuous fertigation combined with 100% ETc depth induced sulfur deficiency in the crop and, combined with 40% ETc depth, promoted the highest calcium concentration. Regardless of the type of application, ETc replacement depths from 82.7 and 40% provide adequate leaf concentrations of nitrogen and magnesium, respectively. Regardless of the applied depth, pulse fertigation reduced the leaf concentrations of magnesium.</jats:p>

Nutrient content and accumulation in mini lettuce as a function of fertigation management strategies

“…The results found in this study corroborate the ones reported by El-Mogy et al (2012) who verified an increase in contents of N, P and K in tissues of green beans using the intermittent irrigation strategy. Menezes et al (2020b) also noticed significant increases in contents of N, P, K and S in coriander using intermittent fertigation. Silber et al (2005) also verified an increase in leaf contents of K, Ca and Mg in green pepper with intermittent fertigation.…”

“…This greater water supply increases the nutrient-root contact by diffusion, since this transport contributes more than 99% to an uptake of Fe, Zn and Mn by the roots (Oliveira et al, 2010). The increase in foliar contents of Fe, Mn and Zn with the use of intermittent irrigation management was also observed in coriander plants by Menezes et al (2020b). Silber et al (2005) verified an increase in Mn contents in green pepper fruits in greater intermittence of daily irrigation.…”

“…+ NO 3 ions, the ways N is uptaken by plants (Buragohain et al, 2019;Baslam et al, 2021). This decrease in K contents in IIC may also have favored a greater uptake of Ca and Mg by lettuce plants, since these nutrients show an antagonistic relationship with K (Menezes et al, 2020b).…”

Statistical process control in pulsed drip irrigation systems

“…Other than being a technique for preventing clogging in drip irrigation, pulsed application is capable of achieving other benefits. For example, the possibility of using water with higher electrical conductivity Cruz et al (2021), Pasternak and Demalach (1995), Silva et al (2022), Arriero et al (2020), Almeida et al (2018), improved water use efficiency Almeida et al (2015), Abdelraouf (2019), Visconti et al (2014), Arriero et al (2020), reduced water percolation under the root zone Elmaloglou and Diamantopoulos (2009), Hicklenton and Cairns (1996), Visconti et al (2014), reduced nitrate leaching (Cote et al, 2003), Watts and Martin (1981), and greater nutrient accumulation within the crop (Menezes et al, 2020). It is worth Rev.…”