The use of hydrogen cyanamide or nitrogen fertilizer increases vegetative and productive performance of fig cv. Roxo de Valinhos

Souza, Jackson Mirellys Azevêdo; Silva, Marcelo de Souza; Ferraz, Rafael Augusto; Modesto, Joyce Helena; Ferreira, Rafael Bibiano; Bolfarini, Ana Carolina Batista; Tecchio, Marco António; Leonel, Sarita

doi:10.4025/actasciagron.v43i1.50519

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…When the accumulated cold hours are insufficient to break dormancy, it is common to use sprouting inducers, such as hydrogen cyanamide (Dormex ® ) and Erger ® , a product that presents organic nitrogen in its composition and presented a good performance anticipating the sprouting and promoted a higher number of buds overcome the dormancy in fig 'Roxo de Valinhos' (Souza et al, 2021). During the process of induction and overcoming of dormancy, several changes occur in the chemical components of plant tissues, mainly in the buds (Seif Elyazal & Rady, 2012).…”

Section: Resultsmentioning

confidence: 99%

Chilling and forcing requirement of five international fig cultivars grown in Southeastern Brazil

et al. 2022

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Chill hours availability influence break dormancy, sprouting and production of temperate fruits trees in different regions. However, there are few reports on the subject for fig tree. This study aimed to evaluate the effects of the accumulated chilling hours on the physiology and dormancy release of fig cultivars. Stem cuttings of five fig cultivars were collected at the end of winter over two crop cycles and exposed to 0, 40, 80, 120 and 160 accumulated chilling hours (CH) in a cold chamber (8±0.5 ºC). Physiology of fig buds was then evaluated with regards to antioxidant enzymes activity, carbohydrate and nitrogen contents. The exposure of fig stem cuttings with two buds to different accumulated CH presented physiological changes for antioxidant enzymes activity, carbohydrates and nitrogen contents and confirming that the cultivars responded differently to the climatic conditions of each crop cycle. Results detected that the lowest accumulated CH in field in 2018 (2.7 CH) enabled a greater effect of the artificial CH when compared to 2017 (19.5 CH). Each fig cultivar had a critical accumulation point. The cultivars Roxo de Valinhos and Pingo de Mel require less CH to break dormancy, while Troyano requires more CH to finish this vegetative rest period.

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Section: Resultsmentioning

confidence: 99%

Chilling and forcing requirement of five international fig cultivars grown in Southeastern Brazil

et al. 2022

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“…It is likely that the reduction in FSR observed after a specific accumulation of chilling was related to the lack of sufficiently high temperatures for sprouting. Figs respond to higher temperatures at the end of winter with an increase in respiratory activity due to the reduction of inhibitors and increase in growth promoters (Souza et al, 2021). Ferraz et al (2020) assessed the phenology of fig cultivars and concluded that Roxo de Valinhos reached the budding stage more quickly than Troyano, which is classified as having a longer harvest cycle.…”

Section: Discussionmentioning

confidence: 99%

“…Vossen and Silver (2000) reported that this species requires 0-150 chilling hours to overcome dormancy depending on cultivar. Chilling accumulation varies by genotype because each cultivar has distinct thermal requirements (Souza et al, 2021). Although the fig tree is grown in regions with mild winters, the development of buds can be unpredictable, which hinders production (Flaishman, Rover, & Stover, 2008).…”

Section: Introductionmentioning

confidence: 99%

Biological method of single-node cuttings for budburst in five fig cultivars subjected to artificial chilling

Monteiro,

Leonel,

Souza

et al. 2023

Acta Sci. Agron.

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Fig orchard expansion requires knowledge of the thermal requirements of genotypes available in different climatic regions. The budburst of fig cultivars was assessed by biological single-node cutting and exposure to artificial chilling. Cuttings from five cultivars were collected during two crop seasons, subsequently packaged in a horizontal position in a cold chamber (8 ± 0.5ºC), and artificially chilled for 0, 40, 80, 120, and 160h. Cuttings were preserved under controlled conditions (23 ± 1°C, RH 85%, and 16h photoperiod). The variables evaluated were the budding velocity, average time and final rate of sprouting, vigorous shoot rate, and average time to leaf opening. The single-node cutting test allowed the assessment of dormancy, which is influenced by the accumulation of chilling in each crop season. The average time and final budding rate varied depending on the temperature requirements for budding. The cultivars were classified on an increasing scale according to their chilling requirements as follows: Pingo de Mel < Roxo de Valinhos < Brown Turkey < White Genova < Troyano. The traditional cultivar in Brazil is Roxo de Valinhos, but all of the cultivars studied had the potential to diversify the fig orchards in this region.

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“…The HC has stood out due to its expressive outcomes allowing better performance to overcome dormancy (Souza et al, 2021) and HC 0.6% is widely used by peaches growers in subtropical regions of São Paulo state, Brazil (Ferreira et al, 2019). However, despite these most evident results, this chemical has been shown a rather toxicity to the repeated exposure by applicators (Hernández and Craig, 2016).…”

Section: Introductionmentioning

confidence: 99%

Tree performance and peach fruits yield and quality under compounds sprays to induce sprouting

Rafael¹,

Leonel²,

Jackson³

et al. 2022

Afr. J. Agric. Res.

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The sprouting induction is a fundamental cultural practice in peach orchards grown in subtropical regions around the world. The evaluation of alternatives compounds to induce sprouting is necessary mainly considering its effects on fruit quality. Two alternative compounds such as 2.5% nitrogen fertilizer (NF) + 4% calcium nitrate (CN) and 4% calcium nitrate (CN), besides the control were compared with 0.6% hydrogen cyanamide (HC), the most effectiveness chemical to induce budburst in peach crops grown in subtropical regions of Brazil. The field experiment was undertaken in São Paulo state, southeast Brazil, in two crop seasons. The hydrogen cyanamide increased crop performance of the 'Douradão' peach. Regardless, nitrogen fertilizer + calcium nitrate promoted an intermediate yield performance. Both treatments enhanced total phenolic compounds in fruits and their antioxidant activity. The efficacy of hydrogen cyanamide in a region with low chill accumulation was confirmed. Furthermore, nitrogen fertilizer + calcium nitrate are promising sprouting inducing and may be an alternative to replace hydrogen cyanamide, because of improved crop performance and peaches quality and considering the need for new products with less toxicity and characteristics of reducing environmental risk profiles and for the consumer market.

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The use of hydrogen cyanamide or nitrogen fertilizer increases vegetative and productive performance of fig cv. Roxo de Valinhos

Cited by 7 publications

References 23 publications

Chilling and forcing requirement of five international fig cultivars grown in Southeastern Brazil

Chilling and forcing requirement of five international fig cultivars grown in Southeastern Brazil

Biological method of single-node cuttings for budburst in five fig cultivars subjected to artificial chilling

Tree performance and peach fruits yield and quality under compounds sprays to induce sprouting

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