Effects of top-dressing nitrogen levels on the productivity of cauliflower

Oliveira, Fabrício Correia de; Almeida, Alexsandro Claudio dos Santos; Geisenhoff, Luciano Oliveira; Lima, José Augusto de Freitas; Niz, Amilcar Isidro Servin

doi:10.15361/1984-5529.2017v45n2p190-196

Cited by 2 publications

(3 citation statements)

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“…A positive and high correlation was observed in Year 1 (r = 0.9999, p = 0.0000) and Year 2 (r = 0.9957, p = 0.0000) with the curd fresh mass, demonstrating that the higher the curd diameter, the higher the fresh mass. The maximum diameter of 21.56 cm was observed with the application of 225 kg ha -1 N, for 'Verona' (Oliveira et al, 2017). Notwithstanding, nonsignificant response to N fertilization has been reported for other varieties/hybrids, with the mean diameter being 20.5 cm for 'Teresópolis Gigante' (Kano et al, 2010), and 17.7 cm for 'Julia' (Camargo et al, 2008), values below the maximum obtained in this study.…”

Section: Resultscontrasting

confidence: 85%

“…The highest efficiency can be verified by the calculation of Agronomic Efficiency (AEN), since the values of 2.91 and 2.58 g kg -1 N applied for Years 1 and 2, respectively, demonstrate the need for a smaller amount of N in Year 2 for the yield of curd fresh mass. The AEN values were higher than those obtained by Oliveira et al (2017), equal to 2.53 g kg -1 , and much higher than those of Camargo et al (2008) and Kano et al (2010), equal to 1.59 and 1.77 g kg -1 , respectively.…”

Section: Resultscontrasting

confidence: 68%

“…The maximum values of curd fresh mass in response to N application in topdressing, 1,435 and 1,611 g, estimated with 331 and 307 kg ha -1 N for 'Snow Mystique' (Figure 2A), differ from the 1,294 g, estimated with 227 kg ha -1 N, 'Verona' (Oliveira et al, 2017); 1,301 g, estimated with 300 kg ha -1 N, 'Teresópolis Gigante' (Kano et al, 2010); and 901 g, estimated with 250 kg ha -1 N, 'Julia' (Camargo et al, 2008) for linear response; and without response to N, mean value of 791 g for 'Sharon' (Mello et al, 2009) and 1,730 g for 'Shiromaru III' (Kojoi et al, 2009). This shows the variation of the yield potential of cauliflower as a function of nitrogen fertilization.…”

Section: Resultsmentioning

confidence: 70%

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SPAD index in the diagnosis of nitrogen status in cauliflower as a function of nitrogen fertilization

et al. 2018

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The correct management of fertilization in cauliflower crop can be obtained by synchronizing the plant demand with the N supply during the crop cycle. There is no study indicating that the SPAD index can be used in the evaluation of nitrogen nutrition of cauliflower. Thus, the objective of this work was to evaluate the nitrogen nutritional status of cauliflower using the SPAD index, and curd yield as a function of nitrogen fertilization. Four rates of N in topdressing (0, 150, 300, and 450 kg ha-1) were evaluated in the experimental design of randomized blocks with four replicates. The final harvest of curds occurred from 68 to 76 days after transplanting. The first-and secondyear results showed a significant difference. Curd fresh mass showed a quadratic adjustment, with the maximum value of 1,435 and 1,611 g, estimated with the rates of 331 and 307 kg ha-1 N, in the first and second year, respectively. The critical levels for leaf total N content were between 48.4 and 57.8 g kg-1 ; and for SPAD units, between 55.90 and 66.63. The nitrogen nutritional status of cauliflower can be estimated using the SPAD index. The critical level for the SPAD index and leaf N content varied from year to year. Higher production of cauliflower curd fresh mass can be obtained with the application of N rates higher than currently recommended.

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Section: Resultscontrasting

confidence: 85%

Section: Resultscontrasting

confidence: 68%

Section: Resultsmentioning

confidence: 70%

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SPAD index in the diagnosis of nitrogen status in cauliflower as a function of nitrogen fertilization

et al. 2018

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Nitrogen and boron fertilization in cauliflower

et al. 2021

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Nitrogen and boron participate concurrently in the growth and development process of plants by changing cell division processes. Therefore, the aim of this study was to evaluate the influence of sources and doses of nitrogen, associated with boron doses and sulfur on the yield and quality aspects of Verona CMS cauliflower. The experimental design was set up under split plot design in randomized blocks, with 3 replicates. The treatments in the plot were sources of ammonium sulphate (NH4)2SO4) and calcium nitrate (Ca(NO3)2) x doses of nitrogen, being 125, 150, 175 and 200 kg ha-1 on topdressing system and in the subplot doses of boron (0, 2, 4 and 6 kg ha-1). The fresh curd mass, curd and stem diameter, total and commercial yield, besides the contents of nitrogen, boron and sulfur in the leaf and curd, were evaluated. The sources and doses of nitrogen and the doses of boron did not influence the fresh curd mass, stem diameter and the total yield of 'Verona CMS' cauliflower. Enhancing doses of Ca(NO3)2 increased curd diameter, however in combination with boron doses there was antagonism effect on curd development. The contents of nitrogen and boron in the leaf were influenced by the fertilization of nitrogen and boron, respectively, when the calcium nitrate source was used.

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Effects of top-dressing nitrogen levels on the productivity of cauliflower

Cited by 2 publications

References 11 publications

SPAD index in the diagnosis of nitrogen status in cauliflower as a function of nitrogen fertilization

SPAD index in the diagnosis of nitrogen status in cauliflower as a function of nitrogen fertilization

Nitrogen and boron fertilization in cauliflower

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