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- W2038052125 abstract "Seedlings of Pinus sylvestris grown in non-axenic sand cultures were inoculated with dry basidiospores of the ectomycorrhizal fungus Pisolithus arhizus or left uninoculated for comparison. The seedlings were watered every 2nd day with a solution containing nutrients in optimal proportions. The concentraion of NH4-N was maintained at 20–25 mg l−1 from day 45 and onwards. After 62 days, the masses, root lengths and N contents of mycorrhizal and non-mycorrhizal seedlings were similar. During the subsequent 32 days, the average relative growth rate of mycorrhizal seedlings was as high as 4.6% day−1, while the corresponding figure for non-mycorrhizal seedlings was 2.7%. During this period no difference in root length developed, but the intensity of mycorrhizal infection increased from 15 to 50% of the root tips in inoculated plants. The average inflow of N into mycorrhizal root tips was calculated to be 0.48 μg tip−1 day−1 in comparison to 0.16 for ordinary roots. It is particularly interesting that mycorrhizas performed a functional role as effective nutrient-absorbing organs at relatively high concentrations of nutrients in the bulk of the soil water. This, and other results published recently, show that frequent small nutrient additions, as opposed to the large single-dosages often practised in forestry, need not be negative for the occurrence and function of ectomycorrhizal symbiosis." @default.
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- W2038052125 date "1989-07-01" @default.
- W2038052125 modified "2023-09-24" @default.
- W2038052125 title "Growth and nitrogen inflow rates in mycorrhizal and non-mycorrhizal seedlings of Pinus sylvestris" @default.
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- W2038052125 doi "https://doi.org/10.1016/0378-1127(89)90070-4" @default.
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