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United States Department of Agriculture

Agricultural Research Service

Research Project: MECHANISTIC PROCESS-LEVEL CROP SIMULATION MODELS FOR ASSESSMENT OF AGRICULTURAL SYSTEMS

Location: Crop Systems & Global Change

Title: Interactions between phosphorus deficiency and CO2 fertilization on cotton

Authors
item Badgujar, Girish -
item Singh, Shardendu -
item Reddy, Vangimalla
item Fleisher, David
item Timlin, Dennis

Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: April 13, 2012
Publication Date: N/A

Technical Abstract: Phosphorus (P) deficiency in acidic soils is a major limiting factor for crop production worldwide. A growth chamber experiment was conducted to study the limiting effect of P deficiency on cotton growth and photosynthesis (Pnet) on current and projected atmospheric carbon dioxide (CO2) concentrations. Irrespective of CO2 fertilization, P deficiency decreased total plant biomass by decreasing plant height, leaf area, mainstem node number and Pnet. The beneficial effects of CO2 fertilization on these parameters were minimal in P deficient plants. The study suggests that P deficiency will have major impact on cotton growth even under CO2 enriched environments of the future.

Last Modified: 7/30/2014
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