NDLI: Above- and belowground ecosystem biomass, carbon and nitrogen allocation in recently afforested grassland and adjacent intensively managed grassland

Content Provider	Springer Nature Link
Author	Peichl, Matthias Leava, Natalie Anne Kiely, Gerard
Copyright Year	2011
Abstract	This study investigated initial land-use change effects on ecosystem biomass, carbon (C) and nitrogen (N) allocation and storage by comparing a recently afforested grassland with an adjacent intensively managed grassland in southern Ireland.Soil C, N and fine root (<2 mm) stocks were determined from soil cores. Above ground biomass, C and N stocks were estimated from biomass clipping, inventory and allometric biomass equations developed for ash (Fraxinus excelsior L.) and black alder (Alnus glutinosa L.) in the 5-year-old forest plantation.Five years after grassland afforestation, the mean fine root stock of 0.31 kg m$^{−2}$ in the forest was about half that of 0.64 kg m$^{−2}$ in the grassland. This decrease was offset by an additional gain of 0.36 kg m$^{−2}$ in tree biomass since afforestation. The above- to below ground biomass ratio shifted from 0.20 in the grassland to 1.59 in the forest. From May to October, mean net N mineralization was significantly lower in the forest compared to the grassland. Soil C and N concentrations in the 0–10 cm soil layer were significantly higher in the forest (62 mg C g$^{−1}$; 5.7 mg N g$^{−1}$) compared to the grassland (45 mg C g$^{−1}$; 3.6 mg N g$^{−1}$). However, the bulk density in the upper forest soil layer was lower than in the grassland. As a result, no differences existed between the respective total (0–30 cm depth) soil C and N stocks. Total ecosystem C and N storage was also similar for the forest (9.5 kg C m$^{−2}$; 0.75 kg N m$^{−2}$) and the grassland (9.3 kg C m$^{−2}$; 0.77 kg N m$^{−2}$).A significant change in total ecosystem C and N following afforestation of this intensively managed grassland was not observed. Nevertheless, this study highlights immediate implications from such land-use change activities on biomass, C and N reallocation among the above- and belowground ecosystem pools which may subsequently affect ecosystem biogeochemical cycles.
Starting Page	281
Ending Page	296
Page Count	16
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	350
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-07-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Allometric equation Ash (Fraxinus excelsior L.) Black alder (Alnus glutinosa L.) Broadleaf forest Fine roots Land-use change Net nitrogen mineralization Vegetation and soil carbon and nitrogen Ecology Plant Physiology Soil Science & Conservation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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