Improving yam yields
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CTA. 1987. Improving yam yields. Spore 7. CTA, Wageningen, The Netherlands.
Permanent link to this item: http://hdl.handle.net/10568/44587
Scientists at the University of Nigeria have shown that treating tubers of white yam ( Dioscorea rotundata) with the growth regulator IBA before planting ensures dormancy is broken and results in more uniform crop establishment and higher yields....
Scientists at the University of Nigeria have shown that treating tubers of white yam ( Dioscorea rotundata) with the growth regulator IBA before planting ensures dormancy is broken and results in more uniform crop establishment and higher yields. Yam tubers are usually dormant at the time of harvest and two to four months must elapse before growth starts again. Nigerian farmers traditionally plant during the dry season in the hope that most tubers will have sprouted by the time the rains come, or else they plant a mixture of sprouted and unsprouted tubers at the start of the rains. Both methods lead to uneven crop establishment. At the University of Nigeria, promising glasshouse trials with the growth regulator IBA (indole butyric acid) have been followed by successful field scale experiments. Al1 tubers treated with IBA at 500 mg/l sprouted within three weeks, whereas only 30% of untreated tubers had sprouted after four weeks. Treated tubers had more rapid shoot and root growth, earlier initiation of new tubers and larger final yields. By using IBA farmers will be able to time the sprouting of their tubers to coincide with the start of the rains, ensuring all plants the benefit of a full growing For further information consult: Tropical Agriculture Oct 1985 Butterworth Scientific Ltd. Westbury House Bury Street Guildford GU2 5BH UNITED KINGDOM