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Soil Science Seminar: Evaluating soil health at the Lethbridge long-term manure plots...
Start Date: 11/16/2017Start Time: 10:00 AM
End Date: 11/16/2017End Time: 11:00 AM
Event Description:
The Department of Soil Science presents:

Xiying Hao, Ph.D.
Agriculture and Agri-Food Canada, Lethbridge, Alberta
Evaluating soil health at the Lethbridge long-term manure plots with the Comprehensive Soil Health Assessment

Thursday, November 16th, 2017, 10:00 a.m., Room 346 Ellis Building

The Comprehensive Soil Health Assessment method of Cornell University was used to determine how long-term manure applications had altered soil properties. Repeated and discontinued manure treatments created a large range of soil organic C (SOC) levels. Two principal component approaches, one with the correlation matrix and the other using standardized values with a covariance matrix, led to two principal components that explained 71.5 and 54.8% of the cumulative variability in the retained soil health dataset, respectively, The first principal component was most strongly correlated to SOC. Although 11 soil health indicators were retained for each method, 8 were shared between methods including: soil protein index, permanganateoxidizable C, pH, SOC, Mg, Ca, Zn, and cation exchange capacity. A simplified soil health assessment may focus on these metrics for manure-amended soils in southern Alberta. The “more is better” philosophy for SOC may be flawed for soils subjected to heavy manure applications, because higher SOC is associated with increased soil salinity, which can limit crop yields. Scoring functions for manure-amended soils should take this into consideration, and may require manure-type specific soil health scoring functions.

Dr. Hao obtained her Ph.D. in Soil Chemistry from the University of Manitoba and has been subsequently a Research Scientist at AAFC, Lethbridge. Her main research interest is nutrient cycling in livestock/crop production with emphasis on livestock manure management. She currently manages several multidisciplinary projects including effects of cattle diet additives on the manure life cycle, novel manure and compost for soil health, and conserving rangeland soil resources. She has published 150+ papers in refereed journals and co-supervised 20+ graduate students. She was invited to the Technical Advisory Group on Soil Carbon Stock Changes for the Livestock Environmental Assessment and Performance (LEAP) Partnership of the Food and Agriculture Organization of the United Nations and is contributing to the development of a protocol to assess soil carbon stock change.
Location Information:
University of Manitoba - Fort Garry - Ellis Building  (View Map)
13 Freedman Crescent
Winnipeg, MB
Room: 346
Xiying Hao
  • Alumni
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  • Event Type:
  • Seminars
  • Event Sponsor:
  • Agricultural & Food Sciences

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