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|Title: ||Effects of Arbuscular Mycorrhizal Inoculation and Phosphorus Application on Yield and Nutrient Uptake of Yam|
|Authors: ||Dare, M. O.|
Abaidoo, R. C.
|Keywords: ||Arbuscular Mycorrhizal inoculation|
|Issue Date: ||2010|
|Publisher: ||Communications in Soil Science and Plant Analysis|
|Citation: ||Communications in Soil Science and Plant Analysis 41 :2729-2743, 2010|
|Abstract: ||To be sustainable, production in the traditional yam cropping system, [aced with
declining soil fertiliry. could benefit from yam-arbuscular mycorrhiizial (AM) symbiosis,
which can improve nutrient uptake, disease resistance, and drought tolerance in plants.
However, only limited information exists about AM colonization of yatn. A pot experiment
was conducted to collect information on the response of two genotypes (Dioscorea
rotundata accession TDr 97/00903 and D. alata accession TDa 297) TO AM inoculation
(witli and without) and phosphorus (P) (0, 0.05, 0.5, and 5 IIIg P kg:' soil). Factorial
combinations of the treatments were arranged in a completely randomized design with
[our replicates. The percentage of AM colonization was significantly lowered at 5
IIlg P kg-I soil rate in mycorrhizal plants of both genotypes. TDr 97/00903 showed
more responsiveness TO AM inoculation than TDa 297. The greatest AM responsivencssfor
tuber yield (52%) was obtained at 0.5 mg P kg-J soil rate lor TD,. 97/00903.
Mycorrhizal inoculation significantly increased root dry weight and tuber Yield of TDr:97/00903 with the greatest values obtained at the 0.5 mg P kg:' soil rare. Atbuscular mycorrhizal inoculation did not lead to significant IP < 0.05) changes in root length
and area, Phosphorus application significantly increased the shoot dry weight and root
diameter ofTDa 297, Uptake of P was greatest at 0.5 mg P kg-I soil in both genotypes
and was significantly influenced by AM inoculation. Nitrogen (N) and potassium IK)
uptake were greatest in mycorrhizal plants at 0.05 mg P kg:' soil for TDr 97/00903 but
at 0.5 mg P ss" soil of non mvcorrhiral plants of TDa 297. The increased tuber yield
and nutrient uptake observed ill the mycorrhizal plants indicate the potential for the
improvement of nutrient acquisition and tuber yield through AM symbiosis.|
|Description: ||An article published by Communications in Soil Science and Plant Analysis 41 :2729-2743, 2010|
|Appears in Collections:||College of Science|
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