Availability of nitrogen and phosphorus in Norway spruce forest floors fertilized with nitrogen and other essential nutrients
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Availability of nitrogen and phosphorus in Norway spruce forest floors fertilized with nitrogen and other essential nutrients. / Vesterdal, Lars; Raulund-Rasmussen, Karsten.
In: Soil Biology & Biochemistry, Vol. 34, No. 9, 2002, p. 1243-1251.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Availability of nitrogen and phosphorus in Norway spruce forest floors fertilized with nitrogen and other essential nutrients
AU - Vesterdal, Lars
AU - Raulund-Rasmussen, Karsten
PY - 2002
Y1 - 2002
N2 - The influence of various fertilization treatments on the availability of N and P in the forest floor was studied in a Danish Norway spruce (Picea abics (L.) Karst.) stand. The treatments included fertilization with N alone in two doses, N combined with lime and other essential nutrients, and lastly lime and nutrients other than N. We tested the hypotheses that fertilization with N alone would increase the availability of N and P in forest floors, and that fertilization with N in combination with lime and other nutrients would further increase N and P availability. Extractable and mineralizable NH4-N, NO3-N, and PO4-P 2 and 3 years after application of fertilizers were the indicators of N and P availability. Microbial activity as reflected by basal respiration rates was not affected by any of the fertilization treatments. The extractable and mineralizable amounts of N both indicated that N fertilization did not increase the availability of N in forest floors. Combined fertilization with N and other essential nutrients including lime reduced N availability, and application of lime and other nutrients than N resulted in the lowest N availability of all treatments. Nitrification rates were, however, increased after application of the highest amount of N and after application of lime. The replication over 2 years showed a consistent pattern, and treatment responses mainly occurred in the LF layer of forest floors. Phosphorus availability increased following liming and fertilization with nutrients other than N; this occurred in the H layer of forest floors. The results did not support the hypothesis that N fertilization increases N availability in the forest floor. There was also no evidence of a sustained positive effect on N availability of combined fertilization with N, lime, and other nutrients. In fact, N availability was reduced by the application of other nutrients and lime, whereas the study suggests that this treatment may positively affect P availability in a longer-term perspective. (C) 2002 Elsevier Science Ltd. All rights reserved.
AB - The influence of various fertilization treatments on the availability of N and P in the forest floor was studied in a Danish Norway spruce (Picea abics (L.) Karst.) stand. The treatments included fertilization with N alone in two doses, N combined with lime and other essential nutrients, and lastly lime and nutrients other than N. We tested the hypotheses that fertilization with N alone would increase the availability of N and P in forest floors, and that fertilization with N in combination with lime and other nutrients would further increase N and P availability. Extractable and mineralizable NH4-N, NO3-N, and PO4-P 2 and 3 years after application of fertilizers were the indicators of N and P availability. Microbial activity as reflected by basal respiration rates was not affected by any of the fertilization treatments. The extractable and mineralizable amounts of N both indicated that N fertilization did not increase the availability of N in forest floors. Combined fertilization with N and other essential nutrients including lime reduced N availability, and application of lime and other nutrients than N resulted in the lowest N availability of all treatments. Nitrification rates were, however, increased after application of the highest amount of N and after application of lime. The replication over 2 years showed a consistent pattern, and treatment responses mainly occurred in the LF layer of forest floors. Phosphorus availability increased following liming and fertilization with nutrients other than N; this occurred in the H layer of forest floors. The results did not support the hypothesis that N fertilization increases N availability in the forest floor. There was also no evidence of a sustained positive effect on N availability of combined fertilization with N, lime, and other nutrients. In fact, N availability was reduced by the application of other nutrients and lime, whereas the study suggests that this treatment may positively affect P availability in a longer-term perspective. (C) 2002 Elsevier Science Ltd. All rights reserved.
M3 - Journal article
VL - 34
SP - 1243
EP - 1251
JO - Soil Biology & Biochemistry
JF - Soil Biology & Biochemistry
SN - 0038-0717
IS - 9
ER -
ID: 8028758