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INTEGRATION OF AQUACULTURE AND ARID LANDS AGRICULTURE FOR WATER REUSE AND REDUCED FERTILIZER DEPENDENCY

Published online by Cambridge University Press:  08 March 2010

KALB T. STEVENSON ,
KEVIN M. FITZSIMMONS ,
PATRICK A. CLAY ,
LILIAN ALESSA  and
ANDREW KLISKEY
KALB T. STEVENSON*
Affiliation:
University of Arizona, Maricopa Agricultural Center, 37860 West Smith-Enke Rd., Maricopa, AZ 85239
KEVIN M. FITZSIMMONS*
Affiliation:
University of Arizona, Maricopa Agricultural Center, 37860 West Smith-Enke Rd., Maricopa, AZ 85239
PATRICK A. CLAY
Affiliation:
University of Arizona, Maricopa Agricultural Center, 37860 West Smith-Enke Rd., Maricopa, AZ 85239
LILIAN ALESSA
Affiliation:
University of Arizona, Maricopa Agricultural Center, 37860 West Smith-Enke Rd., Maricopa, AZ 85239
ANDREW KLISKEY
Affiliation:
University of Arizona, Maricopa Agricultural Center, 37860 West Smith-Enke Rd., Maricopa, AZ 85239
*
Corresponding authors: [email protected] or [email protected]
Corresponding authors: [email protected] or [email protected]
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Summary

Field irrigation is costly in arid regions, and over-fertilization of farmland can lead to high groundwater nitrate levels and significant environmental challenges. Integrative aquaculture and agriculture (IAA) systems allow the reuse of water and nutrients to offset production costs while promoting greater sustainability. The aim of this study was to test the effectiveness of an IAA system using treatments formed from one water source, groundwater (GRND) or fish pond effluent (EFF), and one chemical fertilizer regime, eliminated (ELIM) or historical (HIST). Treatments were applied to field plots of barley or cotton. There were typically positive effects of EFF applications on crop growth and yield relative to GRND applications under identical fertilizer regimes. However, GRND-HIST almost always outperformed EFF-ELIM, suggesting that substituting effluent irrigations for a historical fertilization regime without pond biosolid or reduced fertilizer applications could be detrimental to crop production.

Type
Research Article
Information
Experimental Agriculture , Volume 46 , Issue 2 , April 2010 , pp. 173 - 190
Copyright
Copyright © Cambridge University Press 2010

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