Possibilidade de transplante de cacaueiros (Theobroma cacao L.) com raízes nuas
A study was conducted in the area of the Centro de Pesquisas do Cacau, Ilhéus-Bahia, from August 1976 to February 1977 under greenhouse and field conditions in order to verify the possibility of transplanting bare roots cacao seedlings (Theobroma cacao L.). In greenhouse experiments the efficiency of an antitranspirant (Mobileaf) on control of transpiration of young cacao plants was evaluated. Five concentrations were applied on the leaves of approximately six months old cocoa plants. It was found that concentrations of 10 percent and 20 percent reduced transpiration in 32,0 percent and 45,9 percent respectively, although symptoms of toxicity were observed on the leaves of the plants treated with the higher concentration. Under field conditions, cacao plants aproximately seven months old, balled with earth and bare root, were transplanted: a) with all their leaves; b) with only two leaves; c) without leaves. Also an antidesiccant of the root system (Agricol) was applied to some of the treatments with bare roots. The experimental design was randomized blocks with thirteen treatments and four replications. The rate of survival observed six months after transplanting varied from 100,0 percent to 95,0 percent for plants with roots balled with earth and from 90,00 percent to 34,9 percent for plants with bare roots. Dry weight varied from 48,6 to 21,2 for plants with roots balled with earth and from 31,7 to 16,2 for plants with bare roots. The results indicated that removing part of the leaves and Mobileaf application influenced favorably the survival and development of transplanted cacao seedlings with bare roots. The effects of leaf remotion and application of Mobileaf and Agricol on reduction of transplanting shock are also discussed.
| Main Authors: | , |
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| Format: | biblioteca |
| Published: |
Bahía (Brasil)
1977
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| Subjects: | THEOBROMA CACAO, PLANTULAS, TRASPLANTE, PLANTACION A RAIZ DESNUDA, ANTITRANSPIRANTES, TRANSPIRACION, |
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| Summary: | A study was conducted in the area of the Centro de Pesquisas do Cacau, Ilhéus-Bahia, from August 1976 to February 1977 under greenhouse and field conditions in order to verify the possibility of transplanting bare roots cacao seedlings (Theobroma cacao L.). In greenhouse experiments the efficiency of an antitranspirant (Mobileaf) on control of transpiration of young cacao plants was evaluated. Five concentrations were applied on the leaves of approximately six months old cocoa plants. It was found that concentrations of 10 percent and 20 percent reduced transpiration in 32,0 percent and 45,9 percent respectively, although symptoms of toxicity were observed on the leaves of the plants treated with the higher concentration. Under field conditions, cacao plants aproximately seven months old, balled with earth and bare root, were transplanted: a) with all their leaves; b) with only two leaves; c) without leaves. Also an antidesiccant of the root system (Agricol) was applied to some of the treatments with bare roots. The experimental design was randomized blocks with thirteen treatments and four replications. The rate of survival observed six months after transplanting varied from 100,0 percent to 95,0 percent for plants with roots balled with earth and from 90,00 percent to 34,9 percent for plants with bare roots. Dry weight varied from 48,6 to 21,2 for plants with roots balled with earth and from 31,7 to 16,2 for plants with bare roots. The results indicated that removing part of the leaves and Mobileaf application influenced favorably the survival and development of transplanted cacao seedlings with bare roots. The effects of leaf remotion and application of Mobileaf and Agricol on reduction of transplanting shock are also discussed. |
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