Dormancy in Yams

Craufurd, Peter; Summerfield, R. J.; Asiedu, Robert; Prasad, P. V. Vara

doi:10.1017/s001447970100206x

Cited by 51 publications

(50 citation statements)

References 60 publications

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“…Additionally, the limited rainfall experienced during the tuber bulking phase from the month of July to September (Table 1) may have contributed to the non-significant effects on the yield of the crop even with soil amendment. This supports the findings by (Craufurd, Summerfield, Asiedu, & Vara Prasad, 2001) that the tuber bulking phase in the growth of yam is highly sensitive to water stress.…”

Section: Yields Component Of Yamsupporting

confidence: 92%

Effect of Biochar and Inorganic Fertilizer in Yam (Dioscorea rotundata Poir) Production in a Forest Agroecological Zone

Akom¹,

Oti-Boateng²,

Otoo³

et al. 2015

JAS

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Yam production is characterized by low fertilizer input and annual shifting in search for fertile lands. This practice usually leads to reduction in the yield potential of the crop and destruction of the environment. Biochar additions through its ability to improve soil fertility and increase crop yields could be used to solve these problems. This study therefore investigated the effect of biochar and inorganic fertilizer application on yam production in a forest agro ecological zone in Ghana. A 4×3 factorial experiment in a randomised complete block design with three replications was used. The treatments consisted of four application rates of wood shaving biochar (0 t ha -1 , 5 t ha -1 , 10 t ha -1 and 15 t ha -1 ) and three inorganic fertilizer rates ( 0-0-0 N-P 2 O 5 -K 2 O kg ha . No significant differences in soil parameters in response to the treatment were observed, with the exception of total N, where a decline was observed for all the treatments compared to the controls after harvest. Vegetative growth parameters of yam were not significantly influenced by biochar and inorganic fertilizer application. The number of seed yams per hectare was the only yield parameter that was significantly (p = 0.05) decreased by biochar application. Dry matter, production was also significantly (p = 0.05) increased by fertilizer application at 24 weeks after planting and at harvest. It is suggested that aged and higher rates of biochar would efficiently support yam production.

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Section: Yields Component Of Yamsupporting

confidence: 92%

Effect of Biochar and Inorganic Fertilizer in Yam (Dioscorea rotundata Poir) Production in a Forest Agroecological Zone

Akom¹,

Oti-Boateng²,

Otoo³

et al. 2015

JAS

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“…It is considered that larger amounts of endogenous gibberellins in tubers or bulbils of Chinese yams lead to a deeper dormancy. However, Dioscorea alata L., known as the greater yam, D. cayenensis Lam., the yellow yam, and D. rotundata Poir., the white yam, have different features in the response to dormancy (Craufurd et al, 2001). These tubers have a distinct dormancy period, which can be extended with curing and the application of gibberellic acid.…”

Section: Discussionmentioning

confidence: 99%

Endogenous Gibberellins in Bulbils of Chinese Yam during Growth and Storage

Kim

Shon

Park

et al. 2005

Plant Production Science

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“…Other methods of rapid propagation developed at IITA include production of microtubers (Ng 1988;Balogun et al 2004) from plantlets in vitro, and the production of seed tubers using slips (sprouts) and peels (Aighewi et al 2003b, c). Considerable effort has also been made by IITA and its partners in understanding and manipulating tuber dormancy in order to hasten the cycles of propagation leading to moderate progress in shortening the period in some varieties (Barker et al 1999a, b;Craufurd et al 2001;Swannell et al 2003;Shiwachi et al 2003a, b).…”

Section: Propagationmentioning

confidence: 99%

Crops that feed the World 1. Yams

Asiedu¹,

Sartie²

2010

Food Sec.

192

115

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Yam (Dioscorea sp.) is a major source of food for millions of people in tropical and sub-tropical regions, especially in West and Central Africa where at least 60 million people depend on it. It is also a major source of income and an integral part of socio-cultural life. In addition to their food uses, some Dioscorea species are exploited for pharmaceutical products. Yam cultivation is undergoing intensification in many production zones leading to challenges in the management of soil fertility and structure, increasing pressure of diseases and pests (including weeds), and requirements for new varieties better suited to the changing biophysical and socio-economic circumstances. Greater attention also needs to be paid to raising labor productivity and improving access of producers to affordable and higher quality planting materials. These challenges, and the opportunities associated with the biology of the crop, need to be addressed more systematically and earnestly through collaborative research and development, and effective dissemination of the results to relevant stakeholders. The increasing capacity for, and international collaboration in, research and development on yam augur well for the future of the crop and the millions of people who depend on it.

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Dormancy in Yams

Cited by 51 publications

References 60 publications

Effect of Biochar and Inorganic Fertilizer in Yam (Dioscorea rotundata Poir) Production in a Forest Agroecological Zone

Effect of Biochar and Inorganic Fertilizer in Yam (Dioscorea rotundata Poir) Production in a Forest Agroecological Zone

Endogenous Gibberellins in Bulbils of Chinese Yam during Growth and Storage

Crops that feed the World 1. Yams

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