Rooting Media and Growth Regulators Affect Propagation from Stem Cuttings of carica papaya L.C.v ‘Tainung No. 2’ and ‘Red Lady’
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- Carica papaya, Cutting, Propagation, Indole Butyric Acid, Naphthaleneacetic Acid, Substrate
- Nguyen, Van-Hong; Nguyen, Manh-Tuan; Nguyen, Thuong-Tuan; Tran, Dinh-Ha
- The objective of this study was to evaluate the effect of different substrates and growth regulators on cuttings of Carica papaya cv. ‘Tainung No. 2’ and ‘Red Lady’ for identifying effective practices for the vegetative propagation of these species. Apical cuttings with a standardized length of 18 cm and two pairs of leaves were harvested from hermaphrodite papaya plants planted in the net house. Two experiments were conducted: the first experiment tested the effect of six substrates (sand, perlite, peat moss, vermiculite, a mixture [50:50 by volume] of perlite and vermiculite, and a mixture [50:50 by volume] of peat moss and perlite) and the second experiment evaluated NAA and IBA at five concentrations (0.0, 1,000, 2,000, 3,000, 4,000 and 5,000 ppm). The experimental design was randomized blocks with four replications. After 30 days of planting, the analyzed variables were rooting rate, number and length of roots. In the first experiment, there were significant differences in responses of rooting success to kinds of substrate. The best results of rooting rate, number and length of roots in both varieties were recorded in the peat moss, and a mixture of peat moss and perlite. The data of parameters showed that effect of rooting of the cuttings in both ‘Tainung No.2’ and ‘Red Lady’ were better in IBA treatments than in NAA ones. The best results in ‘Tainung No.2’ and ‘Red Lady’ propagation by cutting were achieved in treatments by 3,000 ppm IBA and 4,000-5,000 ppm IBA respectively.
Full text: IJRAS_1033_FINAL.pdf