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Leachate Chemistry of Field-Weathered Spent Mushroom Substrate

Mingxin Guo, Jon Chorover*, Rex Rosario and Richard H. Fox

Department of Agronomy, The Pennsylvania State Univ., University Park, PA 16802



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  		Fig. 1. Rainfall and water flux time series measured under spent mushroom substrate (SMS) piles (PL3 and PL5), at 0.9 m depth in soil under SMS piles (SL3, SL5), and in an adjacent corn field (SC).

 


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  		Fig. 2. pH of the spent mushroom substrate (SMS) leachate (PL3 and PL5) and soil leachate (SL3 and SL5) under SMS piles and in an adjacent corn field (SC). Symbols indicate monthly volume weighted means of triplicates by sampling date.

 


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  		Fig. 3. Electrical conductivity (EC) of the spent mushroom substrate (SMS) leachate (PL3 and PL5) and soil leachate (SL3 and SL5) under SMS piles and in an adjacent corn field (SC). Symbols indicate monthly volume weighted means of triplicates by sampling date.

 



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  		Fig. 4. (a) Cation and anion concentrations of the spent mushroom substrate (SMS) leachate (PL3) and soil leachate (SL3) under SMS piles. Symbols indicate monthly volume weighted means of triplicates by sampling date.

(b) Cation and anion concentrations of the spent mushroom substrate (SMS) leachate (PL5) and soil leachate (SL5) under SMS piles and (c) in an adjacent corn field (SC). Symbols indicate monthly volume weighted means of triplicates by sampling date.

 


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  		Fig. 5. (a) Dissolved organic carbon (DOC) and (b) organic nitrogen (DON) concentrations of the spent mushroom substrate (SMS) leachate (PL3 and PL5) and soil leachate (SL3 and SL5) under SMS piles and in an adjacent corn field (SC). Symbols indicate monthly volume weighted means of triplicates by sampling date.

 


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  		Fig. 6. Acid neutralizing capacity (ANC) of the spent mushroom substrate (SMS) leachate (PL3 and PL5) and soil leachate (SL3 and SL5) under SMS piles and in an adjacent corn field. Symbols indicate monthly volume weighted means of triplicates by sampling.

 


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  		Fig. 7. Molar absorptivity at 280 nm of dissolved organic matter in the spent mushroom substrate (SMS) leachate (PL3 and PL5) and soil leachate (SL3 and SL5). Symbols indicate monthly volume weighted means of triplicates by sampling date.

 


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  		Fig. 8. Percentage of total leachate dissolved organic carbon (DOC) that did not pass through a 1000-Da molecular weight cutoff ultrafiltration membrane. The terms PL3 and PL5 refer to pile leachate solutions. The terms SL3 and SL5 refer to soil leachate solutions. Symbols indicate monthly volume weighted means of triplicates by sampling date.

 




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