Dairy Sustainability: Past, Present & Future Directions
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1 Dairy Sustainability: Past, Present & Future Directions Judith L. Capper, PhD Vita Plus Dairy Summit 211, Wisconsin Dells, WI, Dec Source: Created by Dr. Judith L. Capper, Washington State University, 211 Sustainability Heads Every Agenda 1
2 The Global Livestock Industry is Under Threat Sources: PETA (21) and World Beef, Pork and Poultry Consumption: Meat Consumption (million MT) Broilers Pork Beef Arable land/person Available Arable Land (ha/person) Sources: Global Insight Demand Analysis to 25; Bauman and Capper (211) Southwest Nutrition and Management Conference, Tempe, AZ. 2
3 Environmental Working Group Suggests Carbon Footprint of Meat is Unfavorable Kg CO 2 eq per kg Consumed Food Source: Environmental Working Group (211) Meat Eater s Guide to Climate Change and Health Carnegie-Mellon Study Claims Meatless Mondays Considerably Reduce Carbon Footprint Shifting less than one day per week s worth of calories from red meat and dairy products to chicken, fish, eggs, or a vegetable-based diet achieves more GHG reduction than buying all locally sourced food. Source: Weber and Matthews (28). Food-miles and the relative climate impacts of food choices in the United States. Env Sci Tech. 42:
4 Meatless Mondays have Negligible Environmental Impact and Lead to Further Questions Dairy/Red Meat = 3.5% of US carbon emissions Meatless Monday =.44% reduction in carbon emissions What happens to consumer choice? What replaces animal by-products? What replaces meat/dairy? Source: US EPA (21) Inventory of U.S. Greenhouse Gas Emissions and Sinks ; Washington, DC Essential to Assess Environmental Impact per Unit of Output Vehicle 1 Vehicle 2 Fuel burned in 5 hours 7 gal 1 gal Distance traveled 35 mi 35 mi Mi per gallon (MPG) 5 35 Passengers 5 4 People miles 17,5 1,4 Production Process Output People MPG Sources: Created by Dr. Judith L. Capper, Washington State University, 21 4
5 Essential to Assess Environmental Impact per Unit of Output Vehicle 1 Vehicle 2 25 People MPG 14 People MPG Sources: Created by Dr. Judith L. Capper, Washington State University, 21 The Majority of Dairy Production s Environmental Impact Occurs On-Farm % of Dairy Carbon Fottprint (CO 2 -eq) Feed Prod'n Milk Prod'n Processing Packaging Transport Retail Consumer Source: Graph created by Dr. Judith L. Capper, Washington State University, 21; Innovation Center for U.S. Dairy (21) U.S. Dairy Sustainability Commitment Progress Report. Available at: 5
6 The Dairy Industry Must be Evaluated on a Production Basis, Not per Cow CO 2 Equivalent Emissions (lb/d) CO 2 Equivalent Emissions (lb/gal) U.S. Dairy Farm Industry has Reduced its Total Carbon Footprint by 41% Since 1944 Source: Capper et al. (29) The environmental impact of dairy production: 1944 compared with 27 J. Anim. Sci. Environmental Impact Reduction due to Improved Productivity Milk yield ( lb/year) Average annual milk yield has quadrupled since Source: Capper et al. (29) The environmental impact of dairy production: 1944 compared with 27 J. Anim. Sci. 6
7 Environmental Impact Reduction due to Improved Productivity 21, 18, 15, 12, 9, 6, 3, mil cows 117 bil lb 9.2 mil cows 186 bil lb Source: Capper et al. (29) The environmental impact of dairy production: 1944 compared with 27 J. Anim. Sci. Supporting Population Must be Included - It Takes a Herd to Make Milk Lactating & Dry Cows + Heifers, Bulls, Young Bulls + Calves Increases Feed Land Water Intake Irrigation Fertilizers Fossil Fuels Greenhouse Gases CO 2 Carbon Dioxide CH 4 Methane N 2 O Nitrous Oxide Nutrient Excretion Manure Source: Created by Dr. Judith L. Capper, Washington State University, 21 7
8 Modern US Milk Production Has Considerably Lower Resource Use and Carbon Emissions 1% 7% 6% % 5% 4% 35% 37% 3% 2% 1% 21% 23% 1% 24% % Animals* Feed* Water* Land* Manure* Carbon Footprint* Source: Capper et al. (29) The environmental impact of dairy production: 1944 compared with 27 Journal of Animal of Science Total Industry CF * Per unit of milk 186 U.S. Bison Population had Carbon Footprint Twice that of the 27 Dairy Industry 25 Carbon footprint (bil kg CO 2 -eq) American Bison Population 27 Dairy Industry Source: Capper (211) Replacing Rose-Tinted Spectacles with a High-Powered Microscope: The Historical vs. Modern Carbon Footprint of Animal Agriculture. Animal Frontiers 1:
9 Hormones are Portrayed as a Human Health Threat Source: Conventional Agriculture is Often Demonized Source: Organic Valley (21) 9
10 Organic Dairy Production Systems Have Lower Yields Than Conventional Systems 8 Average Milk Yield (lb/yr) Rotz et al. Sato et al. Zwald et al. Source: Capper et. al. (28) The environmental impact of recombinant bovine somatotropin (rbst) use in dairy production. PNAS 15: Future U.S. Demand for Dairy Products Best Met via Improved Productivity Dairy Population (, head) % +25% rbst Conventional Organic Source: Capper et. al. (28) The environmental impact of recombinant bovine somatotropin (rbst) use in dairy production. PNAS 15:
11 Future U.S. Demand for Dairy Products Best Met via Improved Productivity 35 Land required (, acres) % +33% rbst Conventional Organic Source: Capper et. al. (28) The environmental impact of recombinant bovine somatotropin (rbst) use in dairy production. PNAS 15: Future U.S. Demand for Dairy Products Best Met via Improved Productivity 14 Carbon Footprint (million MT) % +13% rbst Conventional Organic Source: Capper et. al. (28) The environmental impact of recombinant bovine somatotropin (rbst) use in dairy production. PNAS 15:
12 Beverages Vary in Nutrient Density and Greenhouse Gas Emissions Nutrient Density (%) GHG Emissions g CO 2 /g product Milk Orange Juice Soy Drink Oat Drink Red Wine Soda 19 Beer 11 Mineral Water 1 Source: Smedman et al. (21). Nutrient density to climate impact (NCDI) index of beverages. Food & Nutrition Research 54:
13 Nutrient Density Must Be Included When Assessing Environmental Impact Nutrient Density/Climate Impact Index Milk.28 Orange Juice.25 Soy Drink NDCI Index =.7 Oat Drink.1... Red Wine Nutrient Density GHG Emissions Soda Beer Mineral Water Source: Smedman et al. (21). Nutrient density to climate impact (NCDI) index of beverages. Food & Nutrition Research 54:517. Maximizing Productivity Reduces Total Maintenance Costs & Resource Use Source: Capper, J. L. and R. A. Cady (21). A Point-In-Time Comparison of the Environmental Impact of Jersey vs. Holstein Milk Production. Journal of Dairy Science submitted. Jersey cattle produce 12.5 lb cheese per 1 lb milk Reduced body mass compared to Holsteins Cheese yield and body mass interaction may reduce population maintenance 13
14 Breed Characteristics Summary Holstein Jersey Daily Milk Yield (lb) Fat % Protein % Cheese Yield (lb/lb)* Calving Interval (mo) Annual Turnover % Expected # Lactations* First Calving (mo) Heifer:Cow Ratio* Mature Cow Body Weight (lb) 1,5 1, *Factors in blue are estimated as functions of data accessed; Source: DRMS, DairyMetrics, accessed Nov. 9, 29 Jersey vs. Holstein: Comparison of Resource Use and Environmental Impact Jersey as Percent of Holstein 12% 1% 8% 6% 4% 2% % Holstein 81% 19% 74% 68% 89% 8% Milk Animals Body Mass Water Land GHG Source: Capper, J. L. and R. A. Cady (21). A comparison of the environmental impact of Jersey vs. Holstein milk for cheese production. Journal of Dairy Science. In press. 14
15 Environmental Savings in producing 5, MT Cheddar cheese: Jersey Breed Advantage 376 mi 2 Land Size of Mt. Rainier National Park 66,564 million gallons of Water Would supply 657,889 households annually 517,62 BTU of Energy Would heat 6,335 households annually 1.71 million MT of CO 2 Equivalent to taking 336,888 cars off the road for a year Source: Capper, J. L. and R. A. Cady (21). A Point-In-Time Comparison of the Environmental Impact of Jersey vs. Holstein Milk Production. Greenhouse Gases and Animal Agriculture Conference, Banff, Canada Impact of Performance Characteristics on Water Use for Cheddar Cheese Production Decreases Demand Increases Demand Body Weight Milk Yield Greater Effect Component Yield Herd Life 1st Calving Lesser Effect Calving Interval Source: Capper, J. L. and R. A. Cady (21). A Point-In-Time Comparison of the Environmental Impact of Jersey vs. Holstein Milk Production. Journal of Dairy Science submitted. 15
16 Breed Effect of Performance Characteristics on Water Use for Cheddar Cheese Production 35 HO performing like JE JE performing like HO 3 % Change Body Weight Component Yield Calving Interval Age at 1st Calving Milk Yield Herd Life Source: Capper, J. L. and R. A. Cady (21). A Point-In-Time Comparison of the Environmental Impact of Jersey vs. Holstein Milk Production. Journal of Dairy Science submitted. Practices That Reduce Enteric Methane per Cow May Also Reduce Productivity 1.4x 1.8x The pilot program works by feeding cows a diet high in natural omega-3 sources, such as alfalfa, flax, and grasses Stonyfield Farm has been able to reduce the enteric emissions from the cows by as much as 18%, an average of 12% Source: Stonyfield (29) Last Accessed May 3, 21 16
17 Practices That Reduce Enteric Methane per Cow May Also Reduce Productivity Rumen Bacteria Methane Forage Omega-3 Fatty acids 3.7% fat 3.1% protein 67.1 lb FCM* Source: Created by Jude Capper, Washington State University, *FCM = 3.5% fat-corrected milk = (.432 x milk lb) + (16.23 x fat %) Practices That Reduce Enteric Methane per Cow May Also Reduce Productivity Rumen Bacteria Methane Forage Omega-3 Altered fatty acids 3.2% fat 3.1% protein 6.7 lb FCM* 1% reduction Source: Created by Jude Capper, Washington State University, *FCM = 3.5% fat-corrected milk = (.432 x milk lb) + (16.23 x fat %) 17
18 Carbon Footprint Highlighted by FAO Report Negative Data Produced Positive Results A Negative Correlation Exists Between Milk Yield and Carbon Footprint Milk yield ( kg) Carbon footprint (kg CO 2 -eq/kg) Sources: Graph created by Dr. Judith L. Capper, Washington State University, 21; FAO (21) Greenhouse Gas Emissions from the Dairy Sector. 18
19 Real Life Challenge: Meeting China s New 28 RDI for Milk Chinese Recommended Daily Intake (RDI) of milk raised to 1.6 oz Represents a three fold increase in the Chinese RDI 1.6 oz is a modest requirement, only 44% of the US RDI Average milk yield of Chinese cattle: 24 lb/d Milk Recommended Daily Intake (RDI, oz) in China (pre/post 28) and USA Old China RDI New China RDI US RDI Source: U.S. Dairy Export Council, July Additional Dairy Animals (millions) Required to Meet China s New Milk RDI 65 Existing practices 23 Improved practices Social Sustainability Remains a Huge Challenge Source: Maggie Suisman 19
20 Conclusions Improving productivity is a key factor in mitigating the environmental impact of dairy production Milk yield is a key indicator of efficiency Body weight, milk component yield and other productivity factors also significantly affect environmental impact Environmental impact must be assessed on a scientific rather than a touchy feely basis Source: Created by Dr. Judith L. Capper, Washington State University, 211 Thank you! Source: Last accessed May 7, 21; is not affiliated with Washington State University 2
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