Peaches phenology and production submitted to foliar nitrogen fertilizer and calcium nitrate

Ferreira, Rafael Bibiano; Leonel, Sarita; Souza, Jackson Mirellys Azevêdo; Silva, Marcelo de Souza; Ferraz, Rafael Augusto; Martins, Rafaelly Calsavara; Silva, Marcela Sant’Anna Cordeiro da

doi:10.14393/bj-v35n3a2019-41882

Cited by 8 publications

(17 citation statements)

References 20 publications

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“…In recent years, many agrochemical treatments have been performed in warm areas in order to shorten endodormancy and advance flowering time ( Ardiles and Ayala, 2017 ; Rodrigo et al, 2017 ; Ferreira et al, 2019 ). This practice presents significant problems, however, owing to a lack of knowledge about the efficiency of the treatments and the optimal concentrations and application times for distinct species and cultivars ( Ionescu et al, 2017a ; Rodrigo et al, 2017 ; Pasa et al, 2018 ).…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

“…Most of these agrochemicals contain high concentrations of nitrogen from nitrite salts and amino acids ( Table 1 ). Among these agrochemicals, the most popular are Erger ® + Activ Erger ® and Syncron ® + NitroActive ® ( Rodrigo et al, 2017 ; Ferreira et al, 2019 ). However, new agrochemicals with similar formulas have also been used to a lesser extent, such as Bluprins ® + Bluact ® , Kiplant HB15 ® + Kiplant Inducer ® , Siberio ® + Siberion ® and W-Uniformity Superplus ® ( Tavares et al, 2018 ; Table 1 ).…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

“…Erger ® + Activ Erger ® have been widely applied in many different species like apple, grapevine, kiwi [ Actinidia deliciosa (A.Chev.) C.F.Liang & A.R.Ferguson], blackberry, sweet cherry and peach to promote endodormancy release, and flowering ( Segantini et al, 2015 ; Ardiles and Ayala, 2017 ; Pasa et al, 2018 ; Ferreira et al, 2019 ; Fowler et al, 2020 ).…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

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Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

2022

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Endodormancy in temperate fruit trees like Prunus is a protector state that allows the trees to survive in the adverse conditions of autumn and winter. During this process, plants accumulate chill hours. Flower buds require a certain number of chill hours to release from endodormancy, known as chilling requirements. This step is crucial for proper flowering and fruit set, since incomplete fulfillment of the chilling requirements produces asynchronous flowering, resulting in low quality flowers, and fruits. In recent decades, global warming has endangered this chill accumulation. Because of this fact, many agrochemicals have been used to promote endodormancy release. One of the first and most efficient agrochemicals used for this purpose was hydrogen cyanamide. The application of this agrochemical has been found to advance endodormancy release and synchronize flowering time, compressing the flowering period and increasing production in many species, including apple, grapevine, kiwi, and peach. However, some studies have pointed to the toxicity of this agrochemical. Therefore, other non-toxic agrochemicals have been used in recent years. Among them, Erger® + Activ Erger® and Syncron® + NitroActive® have been the most popular alternatives. These two treatments have been shown to efficiently advance endodormancy release in most of the species in which they have been applied. In addition, other less popular agrochemicals have also been applied, but their efficiency is still unclear. In recent years, several studies have focused on the biochemical and genetic variation produced by these treatments, and significant variations have been observed in reactive oxygen species, abscisic acid (ABA), and gibberellin (GA) levels and in the genes responsible for their biosynthesis. Given the importance of this topic, future studies should focus on the discovery and development of new environmentally friendly agrochemicals for improving the modulation of endodormancy release and look more deeply into the effects of these treatments in plants.

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Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

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Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

2022

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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%

“…This situation raised a necessity to find alternative chemicals to HC to be used in subtropical climate regions, such as NF (Erger®) (Hawerroth et al, 2009;Segantini et al, 2015;Ímrak et al, 2016) and potassium and CN (Seif El-Yazal et al, 2014;Michailidis et al, 2021). Ferreira et al (2019) in preliminaries studies with peach cultivars associated with different concentrations of NF and CN, concluded that NF (2.5%) + CN (4%) provided wider sprouting, flowering and fruit production. These compounds stimulate bud emergence and flowering in the branches, standardizes the phenological stages and increases production efficiency.…”

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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Investigating the effect of plant growth regulators in the endodormancy release in apricot by a metabolomic approach

Guillamón Guillamón,

Andreu-Ardil,

Dicenta

et al. 2024

J Plant Growth Regul

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Endodormancy is one of the most studied physiological processes in perennial plants like apricot. This period is vital both for the tree survival against the adverse climatic conditions of winter and for obtaining a proper flowering and fruit set. Many studies have remarked the importance of chill accumulation as the limiting factor for endodormancy release. The increase of mean temperatures caused by climate change has been seriously endangering this process during the last decades. Because of this, plant growth regulators for promoting endodormancy release have spread worldwide. However, due to the toxicity and the irregular efficiency, there is a great necessity of developing new environment-friendly regulators for promoting endodormancy release. In this 3-year study, we applied four different commercial plant growth regulators to the Flopría apricot cultivar. Two of them, Broston® and Erger® were the most effective ones to advance endodormancy release. The physiology and biochemistry behind these treatments were studied by a non-target metabolomic and expression analysis in flower buds. Metabolic groups, like phospholipids, only varied in treated samples, whereas others like by-products of L-Phe metabolism, or ABA significantly varied in both types of samples throughout endodormancy release. Finally, to validate these results, solutions of phospholipids, phenylpropanoids, or ABA, among others, were applied for the first time to apricot trees, showing, i.e., that phospholipids treated-trees released from endodormancy two weeks earlier than control. This study aims to be an initial stage for the elaboration of environmentally safe regulators in apricot, with a potential in other Prunus and temperate fruit tree species.

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Peaches phenology and production submitted to foliar nitrogen fertilizer and calcium nitrate

Cited by 8 publications

References 20 publications

Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

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

Investigating the effect of plant growth regulators in the endodormancy release in apricot by a metabolomic approach

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