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ARS Home » Midwest Area » Columbia, Missouri » Cropping Systems and Water Quality Research » Research » Publications at this Location » Publication #138405
Title: IMPACT OF GENETICALLY-MODIFIED CROPS AND THEIR MANAGEMENT ON PLANT NUTRIENT TRANFORMATIONS

Author
item MOTAVALLI, PETER - UNIV OF MISSOURI
item Kremer, Robert
item MEANS, NATHAN - UNIV OF MISSOURI

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/7/2002
Publication Date: 11/10/2002
Citation: MOTAVALLI, P.P., KREMER, R.J., MEANS, N.E. IMPACT OF GENETICALLY-MODIFIED CROPS AND THEIR MANAGEMENT ON PLANT NUTRIENT TRANFORMATIONS. AGRONOMY ABSTRACTS. 2002. CD-ROM (UNPAGINATED). AMERICAN SOCIETY OF AGRONOMY. MADISON, WI.

Interpretive Summary:

Technical Abstract: Alterations in plant nutrient transformations due to changes in soil physical, chemical and biological properties by the growth and management of genetically-modified (GM) crops may affect soil fertility and the fate of nutrients in the environment. Among the cited potential mechanisms for the impact of GM crops are changes in the composition and activity of soil microbial populations resulting from root exudates, residue inputs, gene transfer and pesticide applications. Other possible positive or negative impacts of GM crops on the environmental fate of nutrients include increased cultivated area in conservation tillage, cultivation of marginal and degraded lands, and changes in fertility and other cultural practices for specific crops. Little long-term research is currently available that has examined the potential agronomic and environmental impacts of GM crops and their management on nutrient transformations. A suggested strategy for future research on GM crops will be presented that stresses examination of long-term changes in soil nutrient transformations under varying soil and climatic conditions.