|
|
||||||||
a Agriculture and Agri-Food Canada, Ottawa, ON, Canada, K1A 0C6
b Agriculture and Agri-Food Canada, London, ON
c Univ. of Guelph-Kemptville, Kemptville, ON
d National Swine Research & Information Center, Iowa State Univ., Ames, IA
e Ontario Ministry of Agriculture, Food, and Rural Affairs, Stratford, ON
f Ontario Ministry of Environment, Toronto, ON
* Corresponding author (lapend{at}agr.gc.ca).
Received for publication November 7, 2006.
This study examined bacteria and nutrient quality in tile drainage and shallow ground water resulting from a fall land application of liquid municipal biosolids (LMB), at field application rates of 93,500 L ha–1, to silt-clay loam agricultural field plots using two different land application approaches. The land application methods were a one-pass AerWay SSD approach (A), and surface spreading plus subsequent incorporation (SS). For both treatments, it took between 3 and 39 min for LMB to reach tile drains after land application. The A treatment significantly (p < 0.1) reduced application-induced LMB contamination of tile drains relative to the SS treatment, as shown by mass loads of total Kjeldahl N (TKN), NH4–N, Total P (TP), PO4–P, E. coli., and Clostridium perfringens. E. coli contamination resulting from application occurred to at least 2.0-m depth in ground water, but was more notable in ground water immediately beneath tile depth (1.2 m). Treatment ground water concentrations of selected nutrients and bacteria for the study period (
46 d) at 1.2-m depth were significantly higher in the treatment plots, relative to control plots. The TKN and TP ground water concentrations at 1.2-m depth were significantly (p < 0.1) higher for the SS treatment, relative to the A treatment, but there were no significant (p > 0.1) treatment differences for the bacteria. For the macroporous field conditions observed, pre-tillage by equipment such as the AerWay SSD, will reduce LMB-induced tile and shallow ground water contamination compared to surface spreading over non-tilled soil, followed by incorporation.
Abbreviations: A, AerWay LMB, liquid municipal biosolids SS, surface spreading TKN, total Kjeldahl N TP, total phosphorus
This article has been cited by other articles:
![]() |
N. Gottschall, M. Edwards, E. Topp, P. Bolton, M. Payne, W. E. Curnoe, B. B. Coelho, and D. R. Lapen Nitrogen, Phosphorus, and Bacteria Tile and Groundwater Quality Following Direct Injection of Dewatered Municipal Biosolids into Soil J. Environ. Qual., May 1, 2009; 38(3): 1066 - 1075. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Larsbo, D. R. Lapen, E. Topp, C. Metcalfe, K. C. Abbaspour, and K. Fenner Simulation of Pharmaceutical and Personal Care Product Transport to Tile Drains after Biosolids Application J. Environ. Qual., April 27, 2009; 38(3): 1274 - 1285. [Abstract] [Full Text] [PDF] |
||||
![]() |
B. R. B. Coelho, R. C. Roy, A. J. Bruin, A. More, and P. White Zonejection: Conservation Tillage Manure Nutrient Delivery System Agron. J., January 8, 2009; 101(1): 215 - 225. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Soil Science Society of America Journal | Journal of Plant Registrations | The Plant Genome | |||