Staff Profile:Dr Partha Ray
- Name:
- Dr Partha Ray
- Job Title:
- Lecturer in Dairy Animal Science
- Responsibilities:
- Areas of Interest:
Research
Overall goal of my research is to improve the sustainability of animal agriculture by reducing the environmental impact.
Specific research interests include-
Development or identification and implementation of dietary management strategies to improve nutrient (minerals) utilisation efficiency in ruminants and reduce environmental loading of nutrients
Evaluation of manure management strategies to reduce nutrient (minerals) loading to the environment
Nutrient (minerals) evaluation of by-product feed ingredients and forages to improve the prediction of their mineral profile
Quantitative assessment of the contribution of livestock farms to the environmental pool of micropollutants or emerging contaminants (antibiotic residues, heavy metals, antibiotic resistance genes)
Identification of critical control points to develop management strategies to reduce the spread of antimicrobial resistance from livestock farms
Role of heavy metals (Cu, Zn) as nutrients and as antimicrobial agents in ruminants
Teaching
Teaching various animal science topics including animal nutrition, livestock management and the environment
- Research groups / Centres:
- Publications:
-
YNumber of items: 21.
2021
- Keenum, I., Williams, R., Ray, P., Garner, E., Knowlton, K. and Pruden, A. (2021) Combined effects of composting and antibiotic administration on cattle manure-borne antibiotic resistance genes. Microbiome. ISSN 2049-2618 (In Press)
2020
- Li, M. M., Ray, P., Knowlton, K. F., Pruden, A., Xia, K., Teets, C. and Du, P. (2020) Fate of pirlimycin and antibiotic resistance genes in dairy manure slurries in response to temperature and pH adjustment. Science of the Total Environment, 710. 136310. ISSN 0048-9697 doi: https://doi.org/10.1016/j.scitotenv.2019.136310
- Li, M. M., Ray, P., Teets, C., Pruden, A., Xia, K. and Knowlton, K. F. (2020) Increasing temperature and pH can facilitate reductions of cephapirin and antibiotic resistance genes in dairy manure slurries. Journal of Dairy Science, 103 (3). pp. 2877-2882. ISSN 0022-0302 doi: https://doi.org/10.3168/jds.2019-17453
2019
- Wepking, C., Badgley, B., Barrett, J. E., Knowlton, K. F., Lucas, J. M., Minick, K., Ray, P. P., Shawver, S. and Strickland, M. S. (2019) Prolonged exposure to manure from livestock administered antibiotics decreases ecosystem carbon-use efficiency and alters nitrogen cycling. Ecology Letters, 22 (12). pp. 2067-2076. ISSN 1461-0248 doi: https://doi.org/10.1111/ele.13390
- Needs, S. H., Diep, T. T., Bull, S. P., Lindley-Decaire, A., Ray, P. and Edwards, A. D. (2019) Exploiting open source 3D printer architecture for laboratory robotics to automate high-throughput time-lapse imaging for analytical microbiology. PLOS ONE, 14 (11). e0224878. ISSN 1932-6203 doi: https://doi.org/10.1371/journal.pone.0224878
2018
- Feng, X., Ray, P. P., Jarrett, J. P., Karpinski, L., Jones, B. and Knowlton, K. F. (2018) Effect of abomasal inorganic phosphorus infusion on phosphorus absorption in large intestine, milk production, and phosphorus excretion of dairy cattle. Journal of Dairy Science, 101 (8). pp. 7208-7211. ISSN 0022-0302 doi: https://doi.org/10.3168/jds.2018-14515
- Chen, C., Ray, P., Knowlton, K. F., Pruden, A. and Xia, K. (2018) Effect of composting and soil type on dissipation of veterinary antibiotics in land-applied manures. Chemosphere, 196. pp. 270-279. ISSN 0045-6535 doi: https://doi.org/10.1016/j.chemosphere.2017.12.161
2017
- Wepking, C., Avera, B., Badgley, B., Barrett, J. E., Franklin, J., Knowlton, K. F., Ray, P. P., Smitherman, C. and Strickland, M. S. (2017) Exposure to dairy manure leads to greater antibiotic resistance and increased mass-specific respiration in soil microbial communities. Proceedings of the Royal Society B-Biological Sciences, 284 (1851). 20162233. ISSN 1471-2954 doi: https://doi.org/10.1098/rspb.2016.2233
- Ray, P., Chen, C., Knowlton, K. F., Pruden, A. and Xia, K. (2017) Fate and effect of antibiotics in beef and dairy manure during static and turned composting. Journal of Environmental Quality, 46 (1). pp. 45-54. ISSN 1537-2537 doi: https://doi.org/10.2134/jeq2016.07.0269
2016
- Kulesza, S. B., Maguire, R. O., Xia, K., Cushman, J., Knowlton, K. and Ray, P. (2016) Manure injection affects the fate of pirlimycin in surface runoff and soil. Journal of Environmental Quality, 45 (2). pp. 511-518. ISSN 1537-2537 doi: https://doi.org/10.2134/jeq2015.06.0266
2015
- Chambers, L., Yang, Y., Littier, H., Ray, P., Zhang, T., Pruden, A., Strickland, M. and Knowlton, K. (2015) Metagenomic analysis of antibiotic resistance genes in dairy cow feces following therapeutic administration of third generation cephalosporin. PLOS ONE, 10 (8). e0133764. ISSN 1932-6203 doi: https://doi.org/10.1371/journal.pone.0133764
- Ray, P. P. and Knowlton, K. F. (2015) Nutritional strategies for minimizing phosphorus pollution from the livestock industry. In: Malik, P. K., Bhatta, R., Takahashi, J., Kohn, R. and Prasad, C. S. (eds.) Livestock Production and Climage Change. CABI Climate Change Series (6). CAB International, Wallingford, pp. 74-89. ISBN 9781780644325 doi: https://doi.org/10.1079/9781780644325.0074
2014
- Ray, P., Knowlton, K. F., Shang, C. and Xia, K. (2014) Development and validation of a UPLC-MS/MS method to monitor Cephapirin excretion in dairy cows following intramammary infusion. PLoS ONE, 9 (11). 112343. ISSN 1932-6203 doi: https://doi.org/10.1371/journal.pone.0112343
- Ray, P., Knowlton, K. F., Shang, C. and Xia, K. (2014) Method development and validation: solid phase extraction-ultra performance liquid chromatography-tandem mass spectrometry quantification of pirlimycin in bovine feces and urine. Journal of AOAC International, 97 (6). pp. 1730-1736. ISSN 1944-7922 doi: https://doi.org/10.5740/jaoacint.14-040
- Jarrett, J. P., Wilson, J. W., Ray, P. P. and Knowlton, K. F. (2014) The effects of forage particle length and exogenous phytase inclusion on phosphorus digestion and absorption in lactating cows. Journal of Dairy Science, 97 (1). pp. 411-418. ISSN 0022-0302 doi: https://doi.org/10.3168/jds.2013-7124
2013
- Ray, P. P., Jarrett, J. and Knowlton, K. F. (2013) Effect of dietary phytate on phosphorus digestibility in dairy cows. Journal of Dairy Science, 96 (2). pp. 1156-1163. ISSN 0022-0302 doi: https://doi.org/10.3168/jds.2012-5851
- Ray, P., Zhao, Z. and Knowlton, K. F. (2013) Emerging contaminants in livestock manure: hormones, antibiotics and antibiotic resistance genes. In: Kebreab, E. (ed.) Sustainable animal agriculture. CABI, Wallingford, pp. 268-283. ISBN 9781780640426 doi: https://doi.org/10.1079/9781780640426.0268
- Knowlton, K. and Ray, P. (2013) Water-related issues in sustainability: nitrogen and phosphorus management. In: Kebreab, E. (ed.) Sustainable animal agriculture. CABI, Wallingford, pp. 113-123. ISBN 9781780640426 doi: https://doi.org/10.1079/9781780640426.0113
2012
- Ray, P. P., Shang, C., Pearson, R. E. and Knowlton, K. F. (2012) Disappearance of infused phytate from the large intestine of dairy heifers. Journal of Dairy Science, 95 (10). pp. 5927-5935. ISSN 0022-0302 doi: https://doi.org/10.3168/jds.2012-5363
- Ray, P. P., Shang, C., Maguire, R. O. and Knowlton, K. F. (2012) Quantifying phytate in dairy digesta and feces: alkaline extraction and high-performance ion chromatography. Journal of Dairy Science, 95 (6). pp. 3248-3258. ISSN 0022-0302 doi: https://doi.org/10.3168/jds.2011-4984
- Thames, C. H., Pruden, A., James, R. E., Ray, P. P. and Knowlton, K. F. (2012) Excretion of antibiotic resistance genes by dairy calves fed milk replacers with varying doses of antibiotics. Frontiers in Microbiology, 3. 139. ISSN 1664-302X doi: https://doi.org/10.3389/fmicb.2012.00139
- Qualifications:
- Bachelor's degree in Veterinary Science & Animal Husbandry (WB University of Animal & Fishery Sciences, India)
MVSc in Animal Nutrition (CSKHP Agricultural University, India)
PhD in Animal Sciences, Dairy (Virginia Tech, USA)
