Carbon Footprint

Good Things Come in Small Packages!

Cheese made from 100% Jersey milk results in 32% less water, 11% less land and a 20% lower carbon footprint.

A study was conducted by Dr. Jude Capper of Washington State University, and Dr. Roger Cady of Elanco Animal Health, which compared the environmental impact of producing 500,000 tonnes of cheddar cheese using Jersey milk and Holstein milk. The study found that cheese made from nutrient-dense Jersey milk involves considerably less water, land, fuel, waste output and greenhouse gas emissions than cheese made from Holstein milk.

Researchers used an average body weight for Holstein cows of 680kg (1,500 lbs), and 454kg (1,000 lbs) for Jersey cows. Although individual Jerseys produce a smaller volume of milk, their higher fat and protein production, combined with their smaller body mass, sets the Jersey apart when it comes to cheese production.

Although 9% more individual Jersey cows were needed to produce 500,000 metric tons (tonnes) of cheddar cheese than Holsteins, the overall body mass of Jerseys was still 26% less than for their Black and White counterparts.

Thanks to component-rich Jersey milk, 19% less milk volume was required for the Jersey cheese compared to the Holstein cheese. Jerseys average 0.125kg cheese/kg milk (12.5 lbs cheese/cwt), while Holsteins average 0.101kg cheese/kg milk (10.1 lbs cheese/cwt).

The smaller Jersey animal also requires 32% less water and 11% less land to produce 500,000 tonnes of cheddar, making their overall carbon footprint 20% smaller than that of Holsteins. Consumers looking to minimize the environmental impact of their food choices would do well to seek out 100% Jersey cheese.

Capper and Cady concluded that although individual Jerseys produce a smaller volume of milk, their higher fat and protein production, combined with their smaller body mass, sets the Jersey apart when it comes to the environmental impact of cheese production.

Source:  J.L. Capper, R.A. Cady, “A Point-In-Time Comparison of the Environmental Impact of Jersey vs. Holstein Milk Production,” Journal of Dairy Science 95:165-176 (2012)

Jersey: The little GREEN cow

“The GHG to milk ratio: Feed efficiency is saving the environment while improving milk production.” (June 2014 edition of Ontario Dairy Farmer)

In this article, author Anne Cote reports on a presentation made at the Western Canadian Dairy Seminar by Frank Mitloehner and Michael VandeHaar. Cote’s article begins “The most common environmental factors associated with any type of livestock business seems to be greenhouse gas (GHG) emissions and phosphorus levels in manure. At least that’s the message from public policy groups, according to Frank Mitloehner from the Department of Animal Science at the University of California.” You can read the article here: 

Page 1: http://www.jerseycanada.com/edit/files/pdfs/ontario-dairy-farmer-june-2014-32.pdf

Page 2: http://www.jerseycanada.com/edit/files/pdfs/ontario-dairy-farmer-june-2014-33.pdf

Page 3: http://www.jerseycanada.com/edit/files/pdfs/ontario-dairy-farmer-june-2014-34.pdf

Mitloenher is reported as saying that the more milk a cow produces, the lower her GHG emissions. This is because she utilizes the energy in her feed for milk production, rather than expelling it as waste.

The article outlines two ways to reduce a dairy heifer’s environmental footprint:
1. Earlier calving. Once on regular feed, the energy a heifer takes in is used to produce muscle tissue, not milk. The heifer contributes to the farm’s overall GHG emissions, but she is not yet contributing to the farm’s milk production. The earlier she starts her first lactation, the less GHG emissions she produces without any milk production. 

On average, Jerseys reach breeding age 8 weeks sooner than Holsteins. By getting in calf sooner, she will begin her first lactation earlier.

2. Improve longevity. “Mitloehner said the North American rate of culling mature cows in a herd raises the overall GHG emissions of a herd because of the need to be raising replacement heifers which aren’t producing milk for the first two years of their lifespan.” A recent American study found Jerseys to have the lowest culling rate of all breeds, at 25%. Jerseys stay in the herd longer, so fewer replacement heifers are needed. Read more on this from Hoards Dairyman (2014).

Phosphorus

A milking Jersey cow produces 55% less phosphorus (P2O5) in her manure than other dairy breeds. This fact is recognized by the Government of Quebec, as outlined in the Agricultural Operations Regulation Environment Quality Act (Chapter Q-2, r.26), and represents an incredible opportunity for dairy producers everywhere to efficiently administering their nutrient management program while maximizing their herd size.

Farmers all across the country work diligently to maintain effective nutrient management programs.  For dairy producers, this includes applying manure to cropland to ensure a continuous nutrient cycle: nutrients are transported from the field to the barn as feed, and then replaced in the field as manure. 

The three key nutrients in plant production are nitrogen, phosphorus, and potassium. Phosphorus is an essential element for profitable plant and animal production. Soil which contains adequate phosphorus will have improved crop quality, increased root growth, earlier crop maturity, and higher grain production. Generally though, manure application is based on meeting a crop’s nitrogen requirements, which tends to result in excess phosphorus and potassium being applied to the soil because of a mismatch between the nutrient content in manure, and the crop’s nutrient needs. 

Agricultural runoff is a known contributor of excess phosphorus making its way into surface waters and causing an increase in algae growth, called eutrophication. Built-up phosphorus in the top 5cm of soil is washed into surface waterways, or is carried by water percolating through the soil into ground water.  Eutrophication limits light penetration in the water system, depletes dissolved organic carbon, and raises pH levels during the day. Eventually, the dense algal blooms die and decompose, depleting the water’s dissolved oxygen.  Conversion tillage, crop residue management, buffer strips, riparian zones, contour tillage, cover crops and settling basins are all methods producers can use to reduce agricultural runoff and increase the soil’s resistance to erosion.

Another important nutrient management technique is called source management. This is where producers minimize the buildup of phosphorus in the soil while optimizing crop growth levels. This involves adjusting the feed program on the farm to meet the cows’ dietary requirements for phosphorus while minimizing phosphorus output in manure. The nutrient content of manure from dairy cattle is affected by a number of factors, including diet, housing and bedding system, method of manure storage, and type of manure application system.

The Jersey’s comparatively small body size combined with higher milk production per unit of body weight results in about 55% less phosphorus per kilogram of manure, compared to other dairy breeds.

In Quebec, the Environment Quality Act requires that solid manure piles near farm buildings must not contain more than 1,600 kg of phosphorus per year (Section 9.3, Environment Quality Act). The Quebec Ministère du Développement durable, Environnement et Lutte contre les changements climatiques recognizes the Jersey’s reduced phosphorus output compared to other breeds of dairy cattle. As a result, consider an example of herd sizes for various breeds to meet the 1,600 kg phosphorus limit:  

Quebec Environment Quality Act - Annual Phosphorus (P2O5) Production

Category

(P2O5) / animal space (kg)2*

% of Herd

Total # Head

Total P2O5 Production(kg)

Dairy cow (AY, BS, GU, HO, MS) and its 11-day calf

51.8

52%

22

1129

Dairy heifer (AY, BS, GU, HO, MS) >15 months until 1st lactation

32.3

25%

10

339

Dairy calf (AY, BS, GU, HO, MS) from 12 days-15 months

13.7

23%

10

132

Total

 

 

42

1600

Jersey cow and its 11-day calf

23.4

52%

48

1129

Jersey heifer >15 months until 1st lactation

14.6

25%

23

339

Jersey calf from 12 days-15 months

6.2

23%

21

132

Total

 

 

93

1600

Canadienne cow and its 11-day calf

47.1

52%

24

1129

Canadienne heifer >15 months until 1st lactation

29.4

25%

12

339

Canadienne calf from 12 days-15 months

12.5

23%

11

132

Total

 

 

46

1600

*Source: Schedule VII; Agricultural Operations Regulation, Environment Quality Act (Ch Q-2, a. 31, 53.30, 70, 109.1 and 124.1) 

The accepted average Annual Phosphorus (P2O5) Production for dairy breeds other than Jersey and Canadienne allow for a maximum total herd size of 42 head (including 22 milking & dry females) to meet the 1,600 kg phosphorus annual limit. At the same time, a total herd of 93 Jerseys (including 48 milking & dry females) would still meet the 1,600 kg limit. This suggests that a much larger Jersey herd can operate and adhere to Quebec’s Environment Quality Act without the added expense of constructing and maintaining a manure storage facility. Phosphorus output is just one of many ways that Canadian Jerseys use their body size and high-component milk production to demonstrate their efficiency, profitability, and opportunity! Learn More 

The Jersey Advantage 2016 

 

View or download our 8-page brochurethat talks about the efficient and profitable Jersey cow, breed progress, and why the Jersey breed is perfect for today's dairy operation.

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