Nitrogen: Recent Developments in Related Microbial Processes
Nitrogen is a key nutrient for the production of crops on earth. More than any other, it is the growth-limiting nutrient for plant and therefore, it has been added to arable land as fertiliser in enormous quantities, all over the world. Due to its (bio)chemical “flexibility” and its mobility, nitrogen is easily lost to the environment, where it has become a major polluting element in the atmosphere, water and soil. Thus, sound management of the nitrogen resources is a prerequisite for sustainable agriculture and for a clean environment. This calls for understanding of the fate of nitrogen in plant/soil systems. Here, three examples of recent developments in research on nitrogen will briefly be discussed, with emphasis on microbiological processes. These cases are the modelling of nitrogen flow through the soil food web, the use of molecular biological techniques for the identification of ammonium-oxidising bacteria and the mechanisms of host recognition by symbiotic nitrogen-fixing bacteria. They also exemplify progress that has been made in the science on terrestrial ecosystems during the period of the present OECD programme on Biological Resource Management, progress that is needed to develop future strategies for proper management of the biological nitrogen resources.
KeywordsBiomass Sugar Europe Ozone Glycine
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- Cole V, Cerri C, Minami K, Mosier A, Rosenberg N (1996) Agricultural options for mitigation of greenhouse gas emissions. In: Watson RT, Zinyowera MC, Moss RH, Dokken DJ (eds) Climate change 1995. Impacts, adaptations, and mitigation of climate change: scientific-technical analysis. Cambridge Univ Press, Cambridge, pp 745–771Google Scholar
- Frissel MJ, van Veen JA (1981) Simulation of nitrogen behavior in soil-plant systems. Pudoc, Wageningen, 277 ppGoogle Scholar
- Kirkham D, Bartholomew WV (1955) Equations for following nutrient transfor- mations in soil, utilizing tracer data: II. Soil Sci Soc Am Proc 19: 189–192Google Scholar
- Kowalchuk GA, Bodelier PLE, Heilig GHJ, Stephen JR, Laanbroek HJ (1998) Community analysis of ammonia-oxidizing bacteria, in relation to oxygen availability in soils and root-oxygenated sediments, using PCR, DGGE and oligonucleotide probe hybridisation. FEMS Microbiol Ecol 27: 339–350Google Scholar
- Vance CP (1996) Root-bacteria interactions: symbiotic nitrogen fixation. In: Waisel Y et al. (eds) Plant roots; the hidden half. Marcel Dekker, New York, pp 723–755Google Scholar
- Van Elsas JD, Trevors JT, Wellington EMH (1997) Modern soil microbiology. Marcel Dekker,New York, 683 ppGoogle Scholar
- Van Veen JA, Frissel MJ (1981) Simulation model of the behavior of nitrogen in soil. In: Frissel MJ, van Veen JA (eds) Simulation of nitrogen behavior in soil-plant systems. Pudoc, Wageningen, pp 126–144Google Scholar
- Verberne EJL, Hassink J, de Willigen P, Groot JJR, van Veen JA (1990) Modelling organic matter dynamics in different soils. Neth J Agric Sci. 38: 221–238Google Scholar