Disponibilidade de boro em substrato para produção de porta-enxertos de citros em fase de sementeira

Mattos, Dirceu; Boaretto, Rodrigo Marcelli; Corrrêa, Emanuel Roberto de Lima; Abreu, Mônica Ferreira de; Carvalho, Sérgio Alves de

doi:10.1590/s0006-87052008000400022

Cited by 3 publications

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References 13 publications

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“…However, studies involving micronutrients have not received the same attention (MATTOS JÚNIOR et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Star fruit (Averrhoa carambola L.) rootstocks in the treatments with boron doses of 0, 1, 2, 3, and 4 mg dm −3 (Taquaritinga, SP, Brazil, 2013).MattosJúnior et al (2008) observed visual symptoms of boron phytotoxicity in citrus rootstocks cultivated in the substrate with 3 g m −3 of boron. In guava seedlings,Salvador et al (2003) observed symptoms of visual abnormalities caused by boron excess.…”

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Production of Star Fruit Rootstocks Fertilized With Different Boron Doses

Xavier

Natale

2017

BJA

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Among the tropical fruits, star fruit stands out due to its flavor and nutritional properties. Nevertheless, the information on fertilization and nutrition of this fruit is still scarce. For this reason, this study aimed to assess the effect of different boron doses on star fruit rootstock growth. The experimental design was randomized block design, consisting of five treatments of boron application (0, 1, 2, 3, and 4 mg dm−3) and four replications. Star fruit rootstock did not respond to boron doses applied to the substrate and hence it did not influence the parameters stem diameter, plant height, the number of leaves, dry mass of shoot, dry mass of roots, total dry mass, and Dickson quality index (DQI). A boron dose up to 4 mg dm−3 (800% of the recommended boron dose of 0.5 mg dm−3) did not produce symptoms of visual toxicity in the plant.

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“…However, studies involving micronutrients have not received the same attention (MATTOS JÚNIOR et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Production of Star Fruit Rootstocks Fertilized With Different Boron Doses

Xavier

Natale

2017

BJA

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Soil boron fertilization: The role of nutrient sources and rootstocks in citrus production

Mattos¹,

Hippler²,

Boaretto³

et al. 2017

Journal of Integrative Agriculture

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Boron (B) is a key element for citrus production, especially in tropical regions, where the nutrient availability is commonly low in the soil. In addition, information about doses, fertilizer sources, methods of application and, particularly, differential nutrient demand of scion/rootstock combinations are required for efficient fertilization of commercial groves. In a non-irrigated sweet orange orchard (cv. Natal), grafted onto Rangpur lime, Swingle citrumelo or Sunki mandarin, we studied the application of two sources of B: boric acid (17% B, soluble in water) and ulexite (12% B, partially soluble in water) at four levels of supply (control without B, and soil application of 2, 4 and 6 kg ha-1 yr-1 of B). The experiment was carried out for three years. Boron availability in the soil and concentration in the leaves, as well as the fruit yield and quality of trees were evaluated. Soil B extracted with hot water and total leaf B positively correlated with doses of the nutrient applied to the trees. Levels of B in the soil and in the leaves did not vary with fertilizer sources. Fruit yield of trees grafted onto Rangpur lime and Swingle citrumelo was more responsive to B doses than those grafted onto Sunki mandarin. Maximum fruit yield of trees grafted onto Swingle was obtained with 3.2 kg ha-1 yr-1 of B, and leaf B level of 280 mg kg-1 what point out to a highest demand for B when this combination was compared with other rootstocks. Furthermore, fertilization with B did not affect the quality of fruits, but correlated with B and potassium (K) concentrations in the leaves. These results also support that the current recommendations for levels of B in leaves should be revisited.

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Nitrogênio e cobre na produção de mudas de citros em diferentes porta-enxertos

et al. 2010

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A citricultura brasileira é uma atividade de destaque na pauta econômica do País. O seu crescimento e manutenção requerem a produção de 15-20 milhões de mudas anualmente. Em vista das características dos viveiros e das variedades porta-enxertos e copas, há a necessidade de se estabelecer um manejo nutricional adequado dessas plantas. O estudo teve o objetivo de avaliar o suprimento de N e Cu e o desenvolvimento e estado nutricional de mudas de laranjeira 'Pêra', sobre porta-enxertos de limoeiro 'Cravo' e tangerineira 'Sunki'. Foram aplicados dois níveis de N = 120 e 240 mg L-1, e quatro de Cu = 0, 5, 10 e 20 mg L-1 (Cu-EDTA) via fertirrigação, entre o transplantio de porta-enxertos e a finalização da muda. O porta-enxerto de 'Cravo' possui maior vigor comparado à 'Sunki' com base na produção de massa seca e tamanho das plantas. O maior desenvolvimento das mudas foi obtido com a solução de fertirrigação com 240 mg L-1 de N e 5 a 10 mg L-1 de Cu. Houve efeito depressivo na concentração de 20 mg L-1 de Cu, associado a teores de Cu das folhas de 20 mg kg-1 e das raízes de 50 mg kg-1. Esse prejuízo foi menor com o maior fornecimento de N. Da mesma forma, o pegamento de borbulhas da laranjeira 'Pêra' foi ótimo nas doses intermediárias de Cu. A demanda de Cu foi maior para mudas sobre 'Sunki' na maior dose de N e o excesso desse micronutriente reduziu a absorção de Mn. Os teores de Cu foram maiores nas raízes da porção superior do recipiente de produção das muda, o que coincidiu com a maior adsorção do elemento no substrato, com máximo acima de 300 mg kg-1 de Cu.

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Disponibilidade de boro em substrato para produção de porta-enxertos de citros em fase de sementeira

Cited by 3 publications

References 13 publications

Production of Star Fruit Rootstocks Fertilized With Different Boron Doses

Production of Star Fruit Rootstocks Fertilized With Different Boron Doses

Soil boron fertilization: The role of nutrient sources and rootstocks in citrus production

Nitrogênio e cobre na produção de mudas de citros em diferentes porta-enxertos

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