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Nitrate Leaching beneath a Containerized Nursery Crop Receiving Trickle or Overhead Irrigation

David J. Colangelo and Mark H. Brand*

Department of Plant Science, U-67, Univ. of Connecticut, 1376 Storrs Rd., Storrs, CT 06269-4067



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  		Fig. 1. Schematic of soil column system. (A) Side view of soil column and collection vessel configuration. (B) Aerial diagram of soil column and collection vessel layout.

 


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  		Fig. 2. Effect of irrigation and fertilizer on cumulative leachate collected from soil columns. Treatments were overhead sprinkler application of water (Ov), overhead sprinkler plus controlled-release fertilizer (OvF), trickle irrigation (Tr), and trickle irrigation plus controlled-release fertilizer (TrF). * = significant at P <= 0.05; NS = not significant.

 


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  		Fig. 3. Effect of trickle irrigation (Tr), overhead sprinkler irrigation (Ov), trickle irrigation plus controlled-release fertilizer (TrF), and overhead sprinkler irrigation plus controlled-release fertilizer (OvF) on nitrate N concentration in leachate in soil columns during a 2-yr study. Records during the experiment of precipitation and air and soil temperatures and records of percent soil moisture in overhead and trickle irrigation treatments are presented. * = significant at P <= 0.05; NS = not significant.

 


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  		Fig. 4. Effect of trickle irrigation (Tr), overhead sprinkler irrigation (Ov), trickle irrigation plus controlled-release fertilizer (TrF), and overhead sprinkler irrigation plus controlled-release fertilizer (OvF) on cumulative nitrate N in leachate in soil columns during a 2-yr study. Records during the experiment of precipitation and air and soil temperatures and records of percent soil moisture in overhead and trickle irrigation treatments are presented. * = significant at P <= 0.05; NS = not significant.

 




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The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Copyright © 2001 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.