Effects of 2-Chloroethylphosphonic Acid and Nitrogen Fertilizer on Flue-Cured Tobacco Growth and Maturity

Blatt, C. R.; Sponagle, A. G.

doi:10.4141/cjps77-173

Can. J. Plant Sci.

1977

DOI: 10.4141/cjps77-173

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Effects of 2-Chloroethylphosphonic Acid and Nitrogen Fertilizer on Flue-Cured Tobacco Growth and Maturity

C. R. Blatt¹,

A. G. Sponagle²

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1984

1989

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Efeitos do ácido 2-cloroetilfosfônico na maturação de folhas em cultura de fumo (Nicotiana tabacun L.)

Lucchesi

Zambon²,

Montagnoli

1984

An. Esc. Super. Agric. Luiz de Queiroz

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RESUMOEstudou-se a influência do ácido 2-clo¬ roetilfosfônico, aplicado em cultura de fumo (Niaotiana tabacum L.) cultivar "Goianinho", em condições de campo, visando uniformizar e antecipar a colheita das folhas. Aplicou-se o produto comercialEthrel (240 g/l de i.a), nas dosagens de 2,4, 6 e 8 litros/ha, quando nas folhas apre sentavam, na maior parte da planta o crescimento máximo. Após 6 dias do tra¬ * Entregue para publicação em 19/11/84.

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Efeitos do ácido 2-cloroetilfosfônico na maturação de folhas em cultura de fumo (Nicotiana tabacun L.)

Lucchesi

Zambon²,

Montagnoli

1984

An. Esc. Super. Agric. Luiz de Queiroz

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Physiology and Biochemistry of the Tobacco Plant. 1. Growth and Development - Physiologie und Biochemie der Tabakpflanze: 1. Wachstum und Entwicklung

Bush¹,

Tso²

1989

Beiträge Zur Tabakforschung International/Contributions to Tobacco Research

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Growth and development processes of a tobacco plant affect the chemical composition of the leaf and therefore the usability of the leaf. Growth starts with the initial stages of germination and development stops with the cured leaf. Most tobacco seed will germinate in the dark and the first seeds to germinate from a seed lot tend to produce larger plants for transplant and harvest. Nicotine is found in mature seed and increased rate of germination increases rate of nicotine accumulation in the young seedling. Carbon / nitrogen balance in the leaf is important for leaf usability and is influenced by available soil water and soil nitrogen. Oriental leaf is produced typically with limited water and nitrogen supply and the leaf contains large amounts of carbohydrates and ether solubles but small amounts of nitrogenous substances. Cigar filler tobacco is grown on soils with a plentiful supply of soil water and soil nitrogen and the leaf contains large amounts of nitrogenous substances. Intermediate to these tobacco types is flue-cured tobacco which is grown with limited soil nirogen but adequate water and the leaf is relatively thin with high carbohydrate content. Maximum rate of leaf expansion is achieved early in development of a leaf. In flue-cured tobacco phosphorus and potassium concentrations remain constant during growth, whereas nitrogen, calcium and magnesium concentrations decrease. In Oriental tobacco the concentrations of nitrogen, phosphorus, potassium and calcium decrease during the growing season. However, Burley tobacco accumulates relatively greater amounts of nitrogen, phosphorus and potassium during the first half of the growing season relative to dry matter accumulation. Maximum growth per unit leaf weight occurs 14 to 21 days after transplanting, whereas maximum dry matter accumulation per day occurs 50 to 55 days after transplanting. Leaf development including senescence is controlled genetically and decreased chlorophyll and protein and increased nicotine contents are important changes associated with leaf senescence. Maximum nicotine content of leaf occurs at successively higher stalk positions as the plant matures.

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Effects of 2-Chloroethylphosphonic Acid and Nitrogen Fertilizer on Flue-Cured Tobacco Growth and Maturity

Cited by 2 publications

References 1 publication

Efeitos do ácido 2-cloroetilfosfônico na maturação de folhas em cultura de fumo (Nicotiana tabacun L.)

Efeitos do ácido 2-cloroetilfosfônico na maturação de folhas em cultura de fumo (Nicotiana tabacun L.)

Physiology and Biochemistry of the Tobacco Plant. 1. Growth and Development - Physiologie und Biochemie der Tabakpflanze: 1. Wachstum und Entwicklung

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