Adubação com nitrogênio e boro na incidência de hastes ocas e na produção de couve-flor

Kojoi, Cíntia; Mello, Simone da Costa; Camargo, Mônica Sartori de; Fagan, Evandro Binotto; Ribeiro, Maurício Ferreira

doi:10.1590/s1413-70542009000100001

Cited by 7 publications

(7 citation statements)

References 14 publications

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“…The absorption of B did not follow the same patterns of the plant growth rate and high nitrogen concentration promoted reduction in B contents. Kojoi et al (2009) stated that K and S leaf contents in cauliflower were reduced with increasing boron doses, and the results of the present experiment behaved similarly, so that the V% with maximum TDM presented the leaf content of 139.39 mg kg -1 of B.…”

Section: Journal Of Agricultural Studiessupporting

confidence: 67%

Effects of Liming on the Growth and Nutritional Status of Crambe (Crambe abyssinica Hochst)

Mera

Viégas

Galvão

et al. 2020

JAS

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Crambe cultivation has expanded in Brazil. The species is a promising alternative for biodiesel production since its seed contain great amounts of oil. Nevertheless, only few studies have focused on the growth and nutritional requirements of crambe cultivated in acidic soils. Thus, this study aimed to evaluate the effects of liming on the growth and nutrient accumulation of crambe cultivated in a Yellow Latosol of medium texture. The experiment was carried out using a randomized complete block design. The treatments consisted of different soil base saturation levels (0%, 20%, 40%, 60% and 80%) with five replications. Plant height, leaf length, leaf width and the number of seeds were evaluated 90 days after planting. The plant material was separated into leaves, stem, seeds and roots, which were oven dried at 70 ºC until constant weight. Analysis of variance was performed, followed by data regression when significant at 5% probability level by the F test. Crambe responded positively to liming in the soil under study at a base saturation of 56.95% as a function of the biometric variables. The increase in the base saturation of the soil to up to 60% promoted a drastic reduction in plant growth and, therefore, in the final grain yield. The decreasing order of the leaf nutritional content at 56.95% base saturation was: N>Ca>K>Mg>S>P>Fe>B>Mn>Zn> Cu.

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Section: Journal Of Agricultural Studiessupporting

confidence: 67%

Effects of Liming on the Growth and Nutritional Status of Crambe (Crambe abyssinica Hochst)

Mera

Viégas

Galvão

et al. 2020

JAS

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“…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: 98%

“…In the field, N fertilization increases cauliflower yield (Camargo et al, 2008;Kano et al, 2010), but N shortage can result in low yield and curds of small size due to reduced leaf area (Torres et al, 2003). On the other hand, N fertilization does not influence cauliflower yield in intensely cultivated areas, often fertilized with nitrogen fertilizers (Kojoi et al, 2009;Mello et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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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“…Mello et al (2009) studying Sharon genotype with boron dose of 3 kg ha -¹ sowed directly in the pit or divided during the cycle verified that hollow stem was reduced more than 200% when compared with control without fertilization in both ways. Kojoi et al (2009) studying the effect of nitrogen fertilization (120, 180 and 240 kg ha -1 of N) and boron (2, 4 and 6 kg ha -1 of B) on the Shiromaru III genotype, showed that boron do not change presence or absent of hollow stem. They verified that hollow stem has linked direct with nitrogen fertilizations at high concentrations.…”

Section: Resultsmentioning

confidence: 98%

Cauliflower quality and yield under tropical conditions are influenced by boron fertilization

Ribeiro¹,

Zanuzo²,

Vieira³

et al. 2017

Afr. J. Agric. Res.

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The aim of this study was to evaluate the influence of boron fertilization on the quality and yield of cauliflower growing under tropical conditions. The study was carried out in randomized block design in split plot design. The main plots four boron doses (0, 2, 4, 6 kg ha -¹) whereas subplots with 3 cauliflower genotypes (Verona CMS, Sarah and Sharon) with three replicates. Among the genotypes, the higher fresh curd weight means were observed to Sharon followed by Verona and Sarah with 1.007, 0.801 and 0.583kg plant -¹ respectively. In relation to boron doses, genotypes of Sharon, Verona and Sarah showed responsive to boron doses with maximum fresh curd mass of 1.378, 1.216 and 0.804 kg plant -¹ with doses of 6, 4.18 and 4.06 kg B ha -¹. Total yield showed variation up to 307.96% positive with boron added. In contrast, there was observed a high loss ratio in the harvest mainly due to "hollow stem" incidence. Correlations were observed between the incidence of hollow stem, cultivars and boron doses. Analyzing hollow stem disorder between genotypes, Sharon presented higher incidence than Sarah and Verona CMS with values of 88.1%; 73.10% and 66.7%, respectively. Sharon and Verona CMS presented low incidence on the doses of 2 and 4 kg B ha -1 (57.1 and 42.9%) respectively. For Sarah genotype boron dose was not significant whereas 85.7% of the curds were checked with hollow stem disorder. Overall, in this study we can conclude that: (i) Sharon genotype presented the higher productivity, whereas demand more boron fertilization than the other genotypes evaluated; (ii) Under tropical conditions Verona CMS is more tolerant to high temperature than Sarah and Sharon exhibiting more marketable products on postharvest by reducing hollow stem and physiological disorders.

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Adubação com nitrogênio e boro na incidência de hastes ocas e na produção de couve-flor

Cited by 7 publications

References 14 publications

Effects of Liming on the Growth and Nutritional Status of Crambe (Crambe abyssinica Hochst)

Effects of Liming on the Growth and Nutritional Status of Crambe (Crambe abyssinica Hochst)

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

Cauliflower quality and yield under tropical conditions are influenced by boron fertilization

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