Yield of Stevia rebaudiana Bert. Under three population arrangement in middle Sinu
The study objective was to evaluate the effect of three population arrangements on leaf yield in two genotypes of Stevia rebaudina Bert., under environmental conditions of Middle Sinú (Montería - Colombia), during 16 weeks of the first term of 2006. Six treatments were evaluated in a factorial arrangement (2x3), originating from combination of two stevia genotypes (Morita 1 and Morita 2) and three populations arrangements (20x20, 40x20 and 40x40cm between rows and plants, respectively). A completely randomized block design with four replications was used. The traits: wet leaf yield (RHOHU), dry leaf yield (RHOSE), RHOSE/RHOHU ratio (RESEHU), moisture in leaves (PHUHO), leaf/stem wet ratio (RHOTAHU) and leaf/stem dry ratio (RHOTASE ), were analyzed. Significant differences were detected between genotypes (p<0.01) only for RHOTAHU and RHOTASE. The populations arrangement had significant effects (p<0.05 and p<0.01) in the expression of RHOHU, RHOSE, RHOTAHU and RHOTASE. The genotypes by arrangement interactions were only significant (p<0.05) for RHOSE. The plant arrangement 20x20, showed the highest average RHOHU (4654kg ha-1) and RHOSE (1378kg ha-1), surpassing by about 83%; the 40x40 arrangement, considered the control. Morita 1 expressed statistically the most RHOSE (1586kg ha-1) in arrangement 20x20, whereas Morita 2 (1416kg ha-1) did so at the arrangement 40x20. The use of plant arrangements 20x20 y 40x20 for Morita 1 y Morita 2 is suggested to increase yield of stevia in Middle Sinú.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad de Ciencias Aplicadas y Ambientales U.D.C.A
2009
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| Online Access: | https://revistas.udca.edu.co/index.php/ruadc/article/view/651 |
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| Summary: | The study objective was to evaluate the effect of three population arrangements on leaf yield in two genotypes of Stevia rebaudina Bert., under environmental conditions of Middle Sinú (Montería - Colombia), during 16 weeks of the first term of 2006. Six treatments were evaluated in a factorial arrangement (2x3), originating from combination of two stevia genotypes (Morita 1 and Morita 2) and three populations arrangements (20x20, 40x20 and 40x40cm between rows and plants, respectively). A completely randomized block design with four replications was used. The traits: wet leaf yield (RHOHU), dry leaf yield (RHOSE), RHOSE/RHOHU ratio (RESEHU), moisture in leaves (PHUHO), leaf/stem wet ratio (RHOTAHU) and leaf/stem dry ratio (RHOTASE ), were analyzed. Significant differences were detected between genotypes (p<0.01) only for RHOTAHU and RHOTASE. The populations arrangement had significant effects (p<0.05 and p<0.01) in the expression of RHOHU, RHOSE, RHOTAHU and RHOTASE. The genotypes by arrangement interactions were only significant (p<0.05) for RHOSE. The plant arrangement 20x20, showed the highest average RHOHU (4654kg ha-1) and RHOSE (1378kg ha-1), surpassing by about 83%; the 40x40 arrangement, considered the control. Morita 1 expressed statistically the most RHOSE (1586kg ha-1) in arrangement 20x20, whereas Morita 2 (1416kg ha-1) did so at the arrangement 40x20. The use of plant arrangements 20x20 y 40x20 for Morita 1 y Morita 2 is suggested to increase yield of stevia in Middle Sinú. |
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