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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1978.tde-20240301-150846
Document
Author
Full name
Manoel Luiz Ferreira Athayde
Institute/School/College
Date of Defense
Published
Piracicaba, 1978
Supervisor
Title in Portuguese
Efeito do CCC no algodoeiro (Gossypium hirsutum L.)
Keywords in Portuguese
ALGODÃO
REGULADORES DE CRESCIMENTO VEGETAL
Abstract in Portuguese
O presente trabalho teve por objetivo avaliar os efeitos do CCC (cloreto de 2-cloroetil trimetil amônio) aplicado no algodoeiro (Gossypium hirsutum L.), variedade IAC - 16, cultivado em condições de campo, em Jaboticabal, Estado de São Paulo. Utilizaram-se as doses de 40, 50 e 60 g/ha pulverizadas aos 4 e 18 dias após o início do florescimento ou 64 e 78 dias após a germinação, respectivamente. A análise e interpretação dos resultados permitem concluir que o CCC promoveu: 1- Quando aplicado aos 64 dias após a germinação, redução no peso da matéria seca do caule + pecíolo, de toda a parte aérea e da altura final das plantas, e nesta última, o valor médio obtido de todas as aplicações diminuiu com relação à testemunha; 2- Redução no teor de K do caule + pecíolo aos 78 dias quando comparado o valor médio obtido de todas as aplicações com aquele da testemunha, e aos 106 dias, na dose de 50 g/ha; 3- Aumento no teor de N das maçãs aos 78 dias quando comparado o valor médio obtido de todas as aplicações com aquele da testemunha; 4- Redução da uniformidade e porcentagem das fibras quando comparado o valor médio obtido de todas as aplicações com aquele da testemunha; 5- Redução da porcentagem das fibras quando efetuada aos 64 dias após a germinação; 6- Aumento do rendimento de algodão em caroço quando efetuada 78 dias após a germinação; e 7- Aumento do comprimento das fibras quando comparado o valor médio obtido de todas as aplicações com aquele da testemunha.
Abstract in English
This research work viewed to evaluate the effects of CCC applied on cotton plants (Gossypium hirsutum L., cv. ‘IAC-16’), cropped under field conditions. The CCC was applied on two occasions (4 and 18 days after flowering or 64 and 78 days after germination, respectively at the doses of 40, 50 and 60 g/ha. The analysis and interpretation of the results showed that the CCC had the following effects: 1- Reduction in the dry matter content of stem + petiole, of the whole aerial part and in the final plant height when applied 64 days after germination. As to plant height the average value of all applications was lower than the check treatment; 2- Reduction in the K content of stem + petiole at 78 days after germination for the mean of all the applications in relation to the check treatment and at 106 days for the doses of 50 g/ha; 3- Increase in the bolls N content at 78 days after germination for the mean value of all the applications was compared with the check treatment; 4- Reduction in the fiber uniformity and percentage when the mean value of all the applications was compared with that check treatment; 5- Reduction of fiber percentage when applied 64 days after the germination; 6- Increase of seed cotton yield when applied 78 days after germination; and 7- Increase of fiber length when the mean resulting of all applications was compared to the check treatment.
 
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Publishing Date
2024-03-14
 
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