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Biomass, carbon and nitrogen dynamics of multi-species riparian buffers within an agricultural watershed in Iowa, USA

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Abstract

This study was conducted to determine biomass dynamics, carbon sequestration and plant nitrogen immobilization in multispecies riparian buffers, cool-season grass buffers and adjacent crop fields in central Iowa. The seven-year-old multispecies buffers were composed of poplar (Populus×euroamericana ‘Eugenei’) and switchgrass (Panicum virgatum L.). The cool-season grass buffers were dominated by non-native forage grasses (Bromus inermis Leysser., Phleum pratense L. and Poa pratensis L). Crop fields were under an annual corn-soybean rotation. Aboveground non-woody live and dead biomass were determined by direct harvests throughout two growing seasons. The dynamics of fine (0–2 mm) and small roots (2–5 mm) were assessed by sequentially collecting 35 cm deep, 5.4 cm diameter cores (125 cm deep cores in the second year) from April through November. Biomass of poplar trees was estimated using allometric equations developed by destructive sampling of trees. Poplar had the greatest aboveground live biomass, N and C pools, while switchgrass had the highest mean aboveground dead biomass, C and N pools. Over the two-year sampling period, live fine root biomass and root C and N in the riparian buffers were significantly greater than in crop fields. Growing-season mean biomass, C and N pools were greater in the multispecies buffer than in either of the crop fields or cool-season grass buffers. Rates of C accumulation in plant and litter biomass in the planted poplar and switchgrass stands averaged 2960 and 820 kg C ha−1 y−1, respectively. Nitrogen immobilization rates in the poplar stands and switchgrass sites averaged 37 and 16 kg N ha−1 y−1, respectively. Planted riparian buffers containing native perennial species therefore have the potential to sequester C from the atmosphere, and to immobilize N in biomass, therefore slowing or preventing N losses to the atmosphere and to ground and surface waters.

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References

  • Bransby D.I., Mclaughlin S.B. and Parrish D.J. 1998. A review of carbon and nitrogen balances in switchgrass grown for energy. Biomass and Bioenergy 14: 379–384.

    Google Scholar 

  • Buyanovsky G.A., Kucera C.L. and Wagner G.H. 1987. Comparative analyses of carbon dynamics in native and cultivated ecosystems. Ecology 68: 2023–2031.

    Google Scholar 

  • Buyanovsky G.A. and Wagner G.H. 1997. Crop residue input to soil organic matter on Sanborn Field. In: Paul E.A., Paustian K., Elliott E.T. and Cole C.V. (eds), Soil Organic Matter in Temperate Agroecosystems: Long-term Experiments in North America. CRC Press, Boca Raton, Florida, USA, pp. 73–83.

    Google Scholar 

  • Christie E.K. 1979. Ecosystem processes in semi-arid grasslands. II. Litter production, decomposition and nutrient dynamics. Australian Journal of Agricultural Research 30: 29–42.

    Google Scholar 

  • Cole D.W. 1981. Nitrogen uptake and translocation by forest ecosystems. In: Clark F.E. and Rosswall T. (eds), Terrestrial Nitrogen Cycles, Vol. 33. Swedish Natural Science Research Council, Stockholm, pp. 219–232.

    Google Scholar 

  • Derner J.D., Briske D.D. and Boutton T.W. 1997. Does grazing mediate soil carbon and nitrogen accumulation beneath C4, perennial grasses along an environmental gradient? Plant and Soil 191: 147–156.

    Google Scholar 

  • Fail J.L., Hamzah M.N., Haines B.L. and Todd R.L. 1986. Above and belowground biomass, production, and element accumulation in riparian forests of an agricultural watershed. In: Correll D.L. (ed.), Watershed Research Perspectives. Smithsonian Press, Washington, DC, pp. 193–223.

    Google Scholar 

  • Groffman P.M., Gold A.J. and Simmons R.C. 1992. Nitrate dynamics in riparian forest: microbial studies. Journal of Environmental Quality 21: 666–671.

    Google Scholar 

  • Hartnett D.C. 1989. Density and growth stage-dependent responses to defoliation in two rhizomatous grasses. Oecologia 80: 414–420.

    Google Scholar 

  • Hayes D.C. and Seastedt T.R. 1987. Root dynamics of tallgrass prairie in wet and dry years. Canadian Journal of Botany 65: 787–791.

    Google Scholar 

  • Hill A.R. 1996. Nitrate removal in stream riparian zones. Journal Environmental Quality 25: 743–755.

    Google Scholar 

  • Joslin J.D. and Henderson G.S. 1987. Organic matter and nutrients associated with fine root turnover in a white oak stand. Forest Science 33: 330–346.

    Google Scholar 

  • Keeney D.R. and Deluca T.H. 1993. Des Moines River nitrate in relation to watershed agricultural practices: 1945 versus 1980s. Journal of Environmental Quality 22: 267–272.

    Google Scholar 

  • Liang B.C. and MacKenzie A.F. 1994. Corn yield, nitrogen uptake and nitrogen use efficiency as influenced by nitrogen fertilization. Canadian Journal of Soil Science 74: 235–240.

    Google Scholar 

  • Lowrance R.R., Todd R.L., Fail J., Hendrickson O.J., Leonard R. and Asmussen L. 1984. Riparian forests as nutrients filters in agricultural watersheds: I. Phreatic movement. Journal of Environmental Quality 13: 22–27.

    Google Scholar 

  • Ma Z., Wood C.W. and Bransby D.I. 2000. Impacts of soil management on root characteristics of switchgrass. Biomass and Bioenergy 18: 105–112.

    Google Scholar 

  • Marquez C.O., Cambardella C.A., Isenhart T.M. and Schultz R.C. 1999. Assessing soil quality in a riparian buffer by testing organic matter fractions in Central Iowa. Agroforestry Systems 44: 133–140.

    Google Scholar 

  • Mengel D.B. and Barber S.A. 1974. Development and distribution of the corn root system under field conditions. Agronomy Journal 66: 341–344.

    Google Scholar 

  • O'Neill G.J. and Gordon A.M. 1994. The nitrogen filtering capability of Carolina poplar in an artificial riparian zone. Journal Environmental Quality 23: 1218–1223.

    Google Scholar 

  • Peterjohn T.W. and Correll D.L. 1984. Nutrient dynamics in an agricultural watershed: observations on the role of a riparian forest. Ecology 65: 1466–1475.

    Google Scholar 

  • Pickle J. 2000. Microbial biomass in a multispecies riparian buffer. Master, Iowa State University, Ames, Iowa, USA.

    Google Scholar 

  • Schultz R.C., Colletti J.P., Isenhart T.M., SimkinsW.W., Mize C.W. and Thompson M.L. 1995. Design and placement of a multispecies riparian buffer strip system. Agroforestry Systems 29: 1–16.

    Google Scholar 

  • Sivakumar M.J.K., Taylor H.M. and Shaw R.H. 1977. Top and root relations of field grown soybeans. Agronomy Journal 69: 470–473.

    Google Scholar 

  • Stout W.L. and Jung G.A. 1995. Biomass and nitrogen accumulation in switchgrass: effects of soil and environment. Agronomy Journal 87: 663–669.

    Google Scholar 

  • Tilman D. and Wedin D. 1991. Plant traits and resource reduction for five grasses growing on a nitrogen gradient. Ecology 72: 685–700.

    Google Scholar 

  • Tufekcioglu A., Raich J.W., Isenhart T.M. and Schultz R.C. 1999. Fine root dynamics, coarse root biomass, root distribution, and soil respiration in a multispecies riparian buffer in Central Iowa, USA. Agroforestry Systems 44: 163–174.

    Google Scholar 

  • Tufekcioglu A., Raich J.W., Isenhart T.M. and Schultz R.C. 2001. Soil respiration within riparian buffers and adjacent crop fields. Plant and Soil 229: 117–124.

    Google Scholar 

  • Wedin D.A. 1995. Species, nitrogen, and grassland dynamics: the constraints of stuff. In: Jones C.G. and Lawton J.H. (eds), Linking Species and Ecosystems. Chapman and Hall Publishing, New York, USA, pp. 252–262.

    Google Scholar 

  • Wedin D.A. and Tilman D. 1990. Species effects on nitrogen cycling: a test with perennial grasses. Oecologia 84: 433–441.

    Google Scholar 

  • Zavitkovski 1981. Small plots with unplanted plot border can distort data in biomass production studies. Canadian Journal of Forest Research 11: 9–12.

    Google Scholar 

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Tufekcioglu, A., Raich, J., Isenhart, T. et al. Biomass, carbon and nitrogen dynamics of multi-species riparian buffers within an agricultural watershed in Iowa, USA. Agroforestry Systems 57, 187–198 (2003). https://doi.org/10.1023/A:1024898615284

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