Effect of Naphthalene Acetic Acid (NAA) on Root Induction of Macropropagated Pineapple
##article.abstract##
The study was carried out in the screen house of the University of Port Harcourt. Topsoil and sawdust were evaluated as pineapple nursery media using macro-propagated rooted suckers. The effect of Naphthalene acetic acid (NAA) on root induction was also evaluated on macro-propagated suckers without roots. Results revealed that a mixture of topsoil and sawdust in equal proportions produced more vigorous plants and thus more appropriate for the nursery establishment of pineapple plantlets. Plantlets rooted more in 1mg/1 of Naphthalene acetic acid (NAA) compared to 0mg/1. 3mg/l of NAA gave the lowest number of roots. Evidence from this study showed that sawdust and topsoil in the ratio of 1:1 is the best potting mixture thus, can be used for nursery management of plantlets from crowns of Ananas comosus. Plantlets survival at the nursery stage was 100% irrespective of plant size and number of roots at milking. It is therefore recommended that during sucker multiplication using split crown technique, plantlets should be milked as soon as they emerge to facilitate the sprouting of subsequent suckers.
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