Growth dynamics and mycorrhizas of Norway spruce (Picea abies) seedlings in relation to boron supply
作者： Marjoriitta Möttönen , Tarja Lehto , Pedro J. Aphalo
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摘要: The effects of three boron levels on the growth dynamics and ectomycorrhizas seedlings Norway spruce [Picea abies (L.) Karst.] were studied in a room experiment. grown forest humus mixed with quartz sand for 16 weeks. B treatment was applied nutrient solution. Stem height, dry weight, number root tips, mycorrhizas as well N concentrations monitored sequential harvests. By last harvest, week 16, needle 6.6 mg kg–1 at lowest level 17.5 26.5 two higher levels. Boron slightly increased stem height total but did not affect content seedlings. Low internal reduced tips mycorrhizal percentage which indicates importance adequate had more than those receiving lower treatments early 9, when supply 16.0–17.3 kg–1, has previously been considered sufficient level. Therefore, critical should perhaps be re-examined.
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