Low Nitrogen Losses with a New Source of Nitrogen for Cultivation of Conifer Seedlings. Öhlund, J. & Näsholm, T. Environmental Science & Technology, 36(22):4854–4859, November, 2002. Publisher: American Chemical Society![Low Nitrogen Losses with a New Source of Nitrogen for Cultivation of Conifer Seedlings [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Losses of nitrogen (N) when cultivating plants may cause a number of adverse environmental effects. N losses from conifer nurseries, for instance, may have a considerable impact on the local environment, and studies indicate that the bulk of added N is not recovered in the cultivated plants. This study was conducted to obtain insight into the causes of the low recovery and to test an alternative N fertilizer. Hence, growth of the economically important Scots pine (Pinus sylvestris (L).) seedlings and the recovery of different forms of added nitrogen (N) were investigated in a greenhouse experiment. Containerized seedlings were grown in peat for one summer, with two different N fertilizers, one organic (arginine) and one inorganic (a commercial fertilizer (CF) containing a mixture of ammonium and nitrate) each at an N concentration of 3 mM. At the end of the growth period, some seedlings were labeled with solutions containing either U-[13C6], [15N4]-arginine, (15NH4)2SO4, or K15NO3 supplied to the growth substrate. Labeled seedlings were harvested 1 h, 5 days, and 19 days after tracer addition, and the recovery of each added nitrogen source in both the seedlings and the growth substrate was measured. The retention of the three N forms during discharge of solutions from the growth substrate, peat, was tested in a separate experiment. Arginine-fed seedlings grew better and had higher needle N concentrations than the CF-fed seedlings. Isotopic data showed that the arginine treatment gave significantly higher N recoveries (80%) compared to the CF treatment (50%). The low recovery of N in the CF treatment was largely due to very low recovery (30%) of NO3- -N. The retention of the different N forms during discharge of solutions from the growth substrate was highest for arginine, somewhat lower for NH4+, and very low for NO3-. The high rate of seedling growth and the small nitrogen losses observed when using arginine suggest that this amino acid may be an efficient and environmentally favorable N source for cultivating conifer seedlings.
@article{ohlund_low_2002,
title = {Low {Nitrogen} {Losses} with a {New} {Source} of {Nitrogen} for {Cultivation} of {Conifer} {Seedlings}},
volume = {36},
issn = {0013-936X},
url = {https://doi.org/10.1021/es025629b},
doi = {10/c23fx2},
abstract = {Losses of nitrogen (N) when cultivating plants may cause a number of adverse environmental effects. N losses from conifer nurseries, for instance, may have a considerable impact on the local environment, and studies indicate that the bulk of added N is not recovered in the cultivated plants. This study was conducted to obtain insight into the causes of the low recovery and to test an alternative N fertilizer. Hence, growth of the economically important Scots pine (Pinus sylvestris (L).) seedlings and the recovery of different forms of added nitrogen (N) were investigated in a greenhouse experiment. Containerized seedlings were grown in peat for one summer, with two different N fertilizers, one organic (arginine) and one inorganic (a commercial fertilizer (CF) containing a mixture of ammonium and nitrate) each at an N concentration of 3 mM. At the end of the growth period, some seedlings were labeled with solutions containing either U-[13C6], [15N4]-arginine, (15NH4)2SO4, or K15NO3 supplied to the growth substrate. Labeled seedlings were harvested 1 h, 5 days, and 19 days after tracer addition, and the recovery of each added nitrogen source in both the seedlings and the growth substrate was measured. The retention of the three N forms during discharge of solutions from the growth substrate, peat, was tested in a separate experiment. Arginine-fed seedlings grew better and had higher needle N concentrations than the CF-fed seedlings. Isotopic data showed that the arginine treatment gave significantly higher N recoveries (80\%) compared to the CF treatment (50\%). The low recovery of N in the CF treatment was largely due to very low recovery (30\%) of NO3- -N. The retention of the different N forms during discharge of solutions from the growth substrate was highest for arginine, somewhat lower for NH4+, and very low for NO3-. The high rate of seedling growth and the small nitrogen losses observed when using arginine suggest that this amino acid may be an efficient and environmentally favorable N source for cultivating conifer seedlings.},
number = {22},
urldate = {2021-10-19},
journal = {Environmental Science \& Technology},
author = {Öhlund, Jonas and Näsholm, Torgny},
month = nov,
year = {2002},
note = {Publisher: American Chemical Society},
pages = {4854--4859},
}
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Hence, growth of the economically important Scots pine (Pinus sylvestris (L).) seedlings and the recovery of different forms of added nitrogen (N) were investigated in a greenhouse experiment. Containerized seedlings were grown in peat for one summer, with two different N fertilizers, one organic (arginine) and one inorganic (a commercial fertilizer (CF) containing a mixture of ammonium and nitrate) each at an N concentration of 3 mM. At the end of the growth period, some seedlings were labeled with solutions containing either U-[13C6], [15N4]-arginine, (15NH4)2SO4, or K15NO3 supplied to the growth substrate. Labeled seedlings were harvested 1 h, 5 days, and 19 days after tracer addition, and the recovery of each added nitrogen source in both the seedlings and the growth substrate was measured. The retention of the three N forms during discharge of solutions from the growth substrate, peat, was tested in a separate experiment. Arginine-fed seedlings grew better and had higher needle N concentrations than the CF-fed seedlings. Isotopic data showed that the arginine treatment gave significantly higher N recoveries (80%) compared to the CF treatment (50%). The low recovery of N in the CF treatment was largely due to very low recovery (30%) of NO3- -N. The retention of the different N forms during discharge of solutions from the growth substrate was highest for arginine, somewhat lower for NH4+, and very low for NO3-. The high rate of seedling growth and the small nitrogen losses observed when using arginine suggest that this amino acid may be an efficient and environmentally favorable N source for cultivating conifer seedlings.","number":"22","urldate":"2021-10-19","journal":"Environmental Science & Technology","author":[{"propositions":[],"lastnames":["Öhlund"],"firstnames":["Jonas"],"suffixes":[]},{"propositions":[],"lastnames":["Näsholm"],"firstnames":["Torgny"],"suffixes":[]}],"month":"November","year":"2002","note":"Publisher: American Chemical Society","pages":"4854–4859","bibtex":"@article{ohlund_low_2002,\n\ttitle = {Low {Nitrogen} {Losses} with a {New} {Source} of {Nitrogen} for {Cultivation} of {Conifer} {Seedlings}},\n\tvolume = {36},\n\tissn = {0013-936X},\n\turl = {https://doi.org/10.1021/es025629b},\n\tdoi = {10/c23fx2},\n\tabstract = {Losses of nitrogen (N) when cultivating plants may cause a number of adverse environmental effects. N losses from conifer nurseries, for instance, may have a considerable impact on the local environment, and studies indicate that the bulk of added N is not recovered in the cultivated plants. This study was conducted to obtain insight into the causes of the low recovery and to test an alternative N fertilizer. Hence, growth of the economically important Scots pine (Pinus sylvestris (L).) seedlings and the recovery of different forms of added nitrogen (N) were investigated in a greenhouse experiment. Containerized seedlings were grown in peat for one summer, with two different N fertilizers, one organic (arginine) and one inorganic (a commercial fertilizer (CF) containing a mixture of ammonium and nitrate) each at an N concentration of 3 mM. At the end of the growth period, some seedlings were labeled with solutions containing either U-[13C6], [15N4]-arginine, (15NH4)2SO4, or K15NO3 supplied to the growth substrate. Labeled seedlings were harvested 1 h, 5 days, and 19 days after tracer addition, and the recovery of each added nitrogen source in both the seedlings and the growth substrate was measured. The retention of the three N forms during discharge of solutions from the growth substrate, peat, was tested in a separate experiment. Arginine-fed seedlings grew better and had higher needle N concentrations than the CF-fed seedlings. Isotopic data showed that the arginine treatment gave significantly higher N recoveries (80\\%) compared to the CF treatment (50\\%). The low recovery of N in the CF treatment was largely due to very low recovery (30\\%) of NO3- -N. The retention of the different N forms during discharge of solutions from the growth substrate was highest for arginine, somewhat lower for NH4+, and very low for NO3-. 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