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  • 1
    Electronic Resource
    Electronic Resource
    Mycorrhizae formation and nutrient uptake of new corn (Zea mays L.) hybrids with extreme canopy and leaf architecture as influenced by soil N and P levels (2000)
    Springer
    Plant and soil 221 (2000), S. 157-166 
    Details
    ISSN: 1573-5036
    Keywords: arbuscular mycorrhizal fungi ; corn hybrid ; extraradical hyphae ; mycorrhizal colonization ; N/P ratio ; nutrient uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A study was conducted to evaluate the effect of N and P supply levels on mycorrhizal formation and nutrient uptake in corn hybrids with different architectures and to determine arbuscular mycorrhizal fungal (AMF) development in relation to shoot N/P ratio and shoot:root ratio. Corn pot cultures with a pasteurized medium of two parts sand and one part sandy loam soil were grown in the greenhouse. Marigold plants inoculated or not with Glomus intraradices Schenck & Smith were used to establish an AMF hyphal network in the designated soil pots. Corn hybrids were seeded after removal of the marigold plant. Mycorrhizal colonization of corn hybrids and the quantity of extraradical hyphae produced in soil were greatest at the lowest P level and at the intermediate N level. Root colonization was correlated with shoot N/P ratio only at the intermediate N level. The shoot concentrations of P, Mg, Zn and Cu were significantly higher in mycorrhizal plants than in non-mycorrhizal plants. The corn phenotype with the highest shoot:root ratio had the highest root colonization. The corn hybrid with a leafy normal stature architecture had a greater mycorrhizal colonization than that of other two corn hybrids. This experiment showed that N level in soil influenced shoot N/P ratio, root colonization and extraradical hyphal production, which in turn influenced uptake of other nutrients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004777821422
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Seasonal changes of arbuscular mycorrhizal fungi as affected by tillage practices and fertilization : Hyphal density and mycorrhizal root colonization (1997)
    Springer
    Plant and soil 192 (1997), S. 285-293 
    Details
    ISSN: 1573-5036
    Keywords: arbuscular mycorrhizal fungi ; extraradical hyphae ; manure ; root colonization ; seasonality ; tillage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The influence of tillage practices on native arbuscular mycorrhizal fungi (AMF) was studied in two, consecutive years in eastern Canada, in two 11 year-old long-term tillage-fertilizer experimental field soils, a sandy loam and a clay, growing corn in monoculture. The three tillage practices were: 1) conventional tillage (CT; fall plowing plus spring disking), reduced tillage (RT; spring disking) and no-till (NT). The corn crop received either inorganic (N and K) or organic (liquid dairy manure) fertilizers. Mycorrhizal hyphal density was estimated from soil samples obtained in early spring (before disking), at the 12–14 leaf stage, at silking, and at harvest. The percentage of corn root colonization by AMF at the 12–14 leaf stage, at silking and at harvest was also determined. The sandy loam was sampled over two consecutive seasons and the clay soil over one season. Densities of total and metabolically active soil hyphae, and mycorrhizal root colonization were significantly lower in CT soil than in RT and NT soil. Lowest soil hyphal densities were observed in early spring. The levels of intra- and extraradical fungal colonization always increased from spring to silking and decreased thereafter. Spring disking had only a small and transient negative effect on hyphal abundance in soil. Fertilization did not influence mycorrhizal colonization of corn or abundance of soil hyphae in the sandy loam soil, but in the clay soil metabolically active hyphae were more abundant with manure application than with mineral fertilization. In 1992, in both soils different tillage systems had same grain yield, however, in 1993, corn yield was higher in NT compared to CT system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004205828485
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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