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231225s1989 xx |||||o 00| ||eng c |
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|a 10.1111/j.1469-8137.1989.tb02409.x
|2 doi
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|a pubmed24n1080.xml
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|a (DE-627)NLM324287798
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|a (NLM)33874186
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Leith, I D
|e verfasserin
|4 aut
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|a Visible foliar injury of red spruce seedlings subjected to simulated acid mist
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|c 1989
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 20.04.2021
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Two-year-old red spruce seedlings [Picea rubens Sarg. syn. P. rubra (Du Roi) Link] were subjected to 6 simulated acid mist treatments (pH 2.5, 2.7, 3.0, 3.5, 4.0, 5.0) in a replicated experiment using open-top chambers. Acid mist solutions containing equimolar (NH4 )2 SO4 , and HNO3 were applied twice weekly for 22 weeks, each application being equivalent to 2 mm of precipitation. Visible symptoms of foliar damage were observed on the 3 most acidic mist treatments (pH 2.5, 2.7, 3.0). The inputs of nitrogen, sulphur and acidity in the most acidic treatment were 55, 42, 1,3 kg ha-1 , respectively, over a 10 week period. The plants subjected to the pH 2.5 treatment were found to be most severely damaged with approximately 40% foliar necrosis after 10 weeks of treatment. On approximately 80% of seedlings, necrosis was confined to current year needles only. These damaged needles were initially light brown or light orange in colour turning a deeper red 3 to 5 weeks after initial necrosis. Percentage foliar damage was linearly related to concentration (of NH4 + , NO3 - , SO4 2- and H+ ) with 62% foliar damage in the pH 2.5 treatment after a 22-week period. Spray application stopped in December 1987. Observations during the following spring showed that the pH 2.5 and pH 3 treatments induced earlier Hushing, requiring 60 day °C less thermal time than the pH 5-0 treatment. In 1988, this decrease in thermal requirement was equivalent to flushing 11 days earlier. There was no evidence of acid mist treatments inducing bud mortality
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|a Journal Article
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|a Picea rubens
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|a acid mist
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| 650 |
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|a air pollution
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| 650 |
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|a forest decline
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| 650 |
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|a red spruce
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| 650 |
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|a visible foliar damage
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1 |
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|a Murray, M B
|e verfasserin
|4 aut
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|a Sheppard, L J
|e verfasserin
|4 aut
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|a Cape, J N
|e verfasserin
|4 aut
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|a Deans, J D
|e verfasserin
|4 aut
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| 700 |
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|a Smith, R I
|e verfasserin
|4 aut
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| 700 |
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|a Fowler, D
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 113(1989), 3 vom: 20. Nov., Seite 313-320
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:113
|g year:1989
|g number:3
|g day:20
|g month:11
|g pages:313-320
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|u http://dx.doi.org/10.1111/j.1469-8137.1989.tb02409.x
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|h 313-320
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