Abstract
The effect of rooting media and number of nodes per cutting on nursery performance of vanilla fragrance were evaluated in South-western Ethiopia in 2011/ 2012. Six rooting media (forest soil, decomposed animal manure, fine sand, 1:1 mixture of forest soil: fine sand, 1:1 mixture of decomposed animal manure: fine sand and 1:1:1 mixture of forest soil: decomposed animal manure: fine sand) and four levels of node number (two, three, four, and five node cutting) were used in this experiment. Treatments were arranged in randomized complete block design with three replications. The result revealed that interaction between the two factors was significant (P£0.05) for all parameters studied except sprouting percentage and root number. The highest shoot length, shoot girth, shoot fresh weight, shoot dry weigh, leaf number, leaf area, leaf fresh weight, leaf dry weight and root to shoot ratio were obtained from four node cuttings grown on a 1:1:1 mixture of forest soil: decomposed animal manure: fine sand rooting media, with the exception of the highest root length and rooting percentage of cuttings obtained from the rooting media containing pure sand. In addition highest root fresh weight, root volume and root dry weight were obtained from five nodal cuttings. Two nodal cutting grown on decomposed animal manure and pure fine sand media showed lower root initiation and shoot growth. Key words: Vanilla fragrance, propagation, rooting media, node number.
Highlights
IntroductionVanilla grows best under hot humid climate from sea level to an elevation of 1500 m
Vanilla (Vanilla planifolia Andr.) belongs to the familyOrchidaceae, of which some 110 species have been reported so far (Talubnak and Soytong, 2010).Etymologically, vanilla is derived from the Spanish word "vainilla" meaning little pod (James and Ackerman, 2003).Vanilla grows best under hot humid climate from sea level to an elevation of 1500 m
(99.3%) were obtained from four nodal cuttings which are grown in fine sand rooting media followed by five nodal cuttings (16.99 cm and 93.33% respectively) which were grown in 1:1:1 mixture of forest soil, decomposed animal manure and fine sand media
Summary
Vanilla grows best under hot humid climate from sea level to an elevation of 1500 m. Most of its production is carried out between 10°- 20° above and below the equator. The ideal growing conditions include moderate rainfall of 1500 to 3000 mm evenly distributed through 10 months of the year; temperatures of 15 to 30°C during the day and 15 to 20°C during the night and relative. License 4.0 International License humidity of around 80% (Bianchessi, 2004). Ethiopia has favorable environment for vanilla production and the crop has a huge local and international market (Zerihun et al, 2009). Three accessions of vanilla introduced at different times are under adaptation trial in South-western Ethiopia. The first accession (Van.1/93) was introduced from Bali
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