New Bolton Center Kennett Square, PA
Emergencies & Appointments:
Ryan Hospital Philadelphia, PA


Professor, Agricultural Systems, University of Pennsylvania School of Veterinary Medicine, Department of Clinical Studies, New Bolton Center
Contact Information:
University of Pennsylvania
School of Veterinary Medicine
Dept of Clinical Studies
New Bolton Center
382 West Street Road

Nitrogen, Phosphorus, Integrated Management
Nitrogen and phosphorus are essential nutrients for growing crops and animals. Insufficient nutrients diminish yields; excessive nutrients translate to wasted resources and environmental harms. The work of Dr. Dou's group features an integrated system approach, coupling nutrient optimization in animal feeding with manure management and targeted nutrient application to crops for enhanced production efficiency and reduced environmental footprint.

Pathogens, Antimicrobial Resistance (AMR), Livestock Farming
Livestock animals are important reservoirs of zoonotic pathogens as well as antimicrobial resistant determinants (antibiotic residues, AMR microorganisms, and AMR genes). What happens to the microbial pollutants in the post-shed environment? What is their distribution pattern in the intrinsically linked farming sectors and dissemination pathways to the broader territorial and aquatic ecosystems? What interventions may help mitigate relevant risks associated with animal farming concerning food safety and public health? Dr. Dou's research addresses some of these critical issues.

Food waste, Food Security, Sustainability
Sustainable food security is an issue that intersects many of the challenges the world is facing today, e.g. water scarcity, water pollution, resource limitation, land degradation, habitat and biodiversity loss, climate change, hunger and malnutrition. Dr. Dou collaborates with national and international experts to examine sustainable food security issues from multiple dimensions, such as food waste reduction and reuse, engaging and empowering smallholder farmers, etc.

Dou, Z., John D. Toth, Michael L. Westendorf Food waste for livestock feeding: Feasibility, safety, and sustainability implications. Global Food Security : , 2018.

Li T., W. Zhang, J. Yin, D. Chadwick, D. Norse, Y. Lu, X. Liu, X. Chen, F. Zhang, D. Powlson, Z. Dou Enhanced-efficiency fertilizers are not a panacea for resolving the nitrogen problem. Global change biology 24: e511-e521, 2017.

Tong Y., J. Liu, X. Li, J. Sun, A. Herzberger, D. Wei, W. Zhang, Z. Dou, F. Zhang. Cropping System Conversion led to Organic Carbon Change in China's Mollisols Regions. Scientific reports 7: 18064, 2017.

Pitta D., Z. Dou, S. Kumar, N. Indugu, J. Toth, B. Vecchiarelli, B. Bhukya Metagenomic Evidence of the Prevalence and Distribution Patterns of Antimicrobial Resistance Genes in Dairy Agroecosystems. Foodborne pathogens and disease 13: 296-302, 2016.

Zhang W., G. Cao, X. Li, H. Zhang, C. Wang, Q. Liu, X. Chen, Z. Cui, J. Shen, R. Jiang, G. Mi, Y. Miao, F. Zhang, Z. Dou Closing yield gaps in China by empowering smallholder farmers. Nature 537: 671-674, 2016.

Dou, Z., J. Ferguson, D. Galligan, A. Kelly, S. Finn, R. Giegengack. Assessing food loss across U.S. supply chain and opportunities for reduction Global Food Security 8: 19-26, 2016.

Li, Y., W. Zhang, L. Ma, L. Wu, J. Shen, W.J. Davies, O. Oenema, F. Zhang, and Z. Dou An analysis of China's grain production: looking back and looking forward. Food and Energy Security 3: 19-32, 2014.

W. Zhang, Z. Dou, P. He, X. Ju, D. Powlson, D. Chadwick, D. Norse,Y. Lu, Y. Zhang, L. Wu, X. Chen, K. G. Cassman, and F. Zhang New technologies reduce greenhouse gas emissions from nitrogenous fertilizer in China PNAS 110: 8375-80, 2013.

Dou Z, Ferguson JD, Fiorini J, Toth JD, Alexander SM, Chase LE, Ryan CM, Knowlton KF, Kohn RA, Peterson AB, Sims JT, Wu Z Phosphorus Feeding Levels and Critical Control Points on Dairy Farms J. Dairy Sci. 86: 3787-95, 2003.

B.S. Yan'an University, China, 1982

M.S. Chinese Academy of Sciences, 1985

PhD Penn State University, 1993

Penn State University, Department of Agronomy (1993 to 1994)
Post-Doctoral Fellow

University of Pennsylvania, School of Veterinary Medicine (1994 to 1996)
Research Associate