Crop development and root distribution in lesser yam (Dioscorea esculenta): Implications for fertilization

Melteras, Marie-Vianney, Lebot, Vincent., Asher, Colin. J. and O'Sullivan, Jane N. (2008) Crop development and root distribution in lesser yam (Dioscorea esculenta): Implications for fertilization. Experimental Agriculture, 44 2: 209-221. doi:10.1017/S0014479708006339


Author Melteras, Marie-Vianney
Lebot, Vincent.
Asher, Colin. J.
O'Sullivan, Jane N.
Title Crop development and root distribution in lesser yam (Dioscorea esculenta): Implications for fertilization
Formatted title
Crop Development and Root Distribution in Lesser Yam (Dioscorea Esculenta): Implications for Fertilization
Journal name Experimental Agriculture   Check publisher's open access policy
ISSN 0014-4797
Publication date 2008-04-01
Sub-type Article (original research)
DOI 10.1017/S0014479708006339
Open Access Status
Volume 44
Issue 2
Start page 209
End page 221
Total pages 13
Editor D. Harris
Place of publication New York , U.S.A.
Publisher Cambridge University Press
Language eng
Subject C1
070302 Agronomy
820215 Vegetables
Abstract A growth analysis study involving monthly excavation of Dioscorea esculenta plants revealed that the root system developed fully in the period before tuber initiation, and extended radially for a distance between 2.3 and 4.3 m. Primary roots initially remained in the top 10 cm of the soil profile, but descended to approximately 30 cm near their full extension. Tuber number increased from initiation around 21 weeks after planting (WAP) until maximum vine growth was reached around 33 WAP, but tuber dry weight continued to increase throughout the senescence period of the vine, to 45 WAP. Tubers lost dry matter but not fresh weight during dormancy in the soil, to 55 WAP. The results indicate that a distance of at least 4.5 m is required to separate experimental fertilizer treatments, and that post-establishment burial of fertilizers around the mound or ridge risks damage to roots near their base, while inter-row application is accessible to roots and may be preferable.
Keyword Nutrient deficiencies
Rotundata Poir
growth
yield
Ultisol
nitrogen
support
Pattern
Seed
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Agriculture and Food Sciences
 
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Created: Thu, 16 Apr 2009, 05:17:37 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences