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High nitrogen deposition may enhance growth of a new hybrid larch F-1 growing at two phosphorus levels

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Title: High nitrogen deposition may enhance growth of a new hybrid larch F-1 growing at two phosphorus levels
Authors: Mao, QiaoZhi Browse this author
Watanabe, Makoto Browse this author →KAKEN DB
Makoto, Kobayashi Browse this author
Kita, Kazuhito Browse this author
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Larix gmelinii x L. kaempferi
Nitrogen deposition
Phosphorus limitation
Issue Date: Jan-2014
Publisher: Springer japan kk
Journal Title: Landscape and ecological engineering
Volume: 10
Issue: 1
Start Page: 1
End Page: 8
Publisher DOI: 10.1007/s11355-012-0207-2
Abstract: A recently developed hybrid larch F-1 (F-1: Larix gmelinii var. japonica x L. kaempferi) is being planted widely in re- and afforestation projects in northeast Asia. Nitrogen (N) deposition to forest ecosystems has been rapidly increasing in this region, due mainly to industrialization and overuse of N fertilizer. Together with excess N, phosphorus (P) is considered to be the key determinant of tree growth in northeast Asia, because most soils have originated from immature volcanic ash. To predict the response of the F-1 to increasing N deposition and its relation with soil P availability related to immature volcanic ash soil in northern Japan, planting stocks of F-1 were grown in potted brown forest soil and categorised into eight treatments, comprising four N treatments covering the amount of N deposition observed and predicted in northeast Asia in combination with two P levels. N application increased the biomass and the light-saturated net photosynthetic rate (A (sat)) of the F-1 at all concentrations. Despite expectations, P did not have any effect on these parameters. As N application increased the content of potassium (K), magnesium (Mg) and chlorophyll (Chl) in needles, a positive correlation was found between the content of N, K, P and A (sat). These results suggest that N deposition improves the growth of the hybrid larch F-1 at least by improving the needle N condition, as well as the concentration of other macronutrients in the initial stage of plantation.
Rights: The final publication is available at Springer via
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小池 孝良

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