Main Chemical Nutrient Balances of a Typical Arable Ecosystem in North China

Abstract:

Changes of nutrient cycle and balance in agricultural ecosystem will bring heavy impacts not only on land production, but also on ecological and environmental condition. We studied on the balances of main nutrients (carbon, nitrogen and phosphor) and their long-term changes in a typical arable ecosystem in North China, based on the resource data got from household surveys combined with land use data derived from remote sensing imagery. The results show that C and N balances of large-scale irrigated land changed from deficits in 1945 into great surpluses in 2002, respectively, and P surpluses also doubled in 2002. C, N and P balances in overall arable ecosystem showed significant surpluses despite of decreased total arable area after 60 years. Contrarily, C and N fluxes of arable landscape in 1945 showed overall deficits. Nutrient balance changes of arable lands were impacted mainly by anthropogenic factors such as fertilizer input, land productivity crop residue utility and land use.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 2728-2732
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.2728
• Online since: July 2012
• Authors: Kui Peng
• Keywords: Arable Land, Carbon, Nitrogen, Nutrient Balance, Phosphor, Village Landscape

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