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Meat!. Meat Production and Consumption Have Grown Steadily. Animals for meat raised in Pastures and rangelands Feedlots Meat production increased fourfold between 1961 and 2007 Increased demand for grain Demand is expected to go higher. Producing Meat. Rangeland Too dry

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Meat production and consumption have grown steadily
Meat Production and Consumption Have Grown Steadily

  • Animals for meat raised in

    • Pastures and rangelands

    • Feedlots

  • Meat production increased fourfold between 1961 and 2007

    • Increased demand for grain

    • Demand is expected to go higher


Producing meat
Producing Meat

  • Rangeland

    • Too dry

    • Too steeply sloped

    • Too infertile… to grow crops

      • 40% of ice-free land area

  • Pastures

    • Managed grasslands or enclosed meadows


How is meat produced

Kilograms of grain needed per kilogram of body weight

Beef cattle

7

Pigs

4

Chicken

2.2

Fish (catfish

or carp)

2

How is meat produced?

  • Feedlots

    • Account for 40% of the world’s meat production

  • Open grazing

    • 80% of cattle, sheep and goats are raised on rangeland



Producing more meat
Producing More Meat

  • Condition of the world’s rangelands

  • Environmental Consequences of meat produciton

    • See connections page 299 (13th edition)

    • Read Spotlight page 300 (13th edition)

    • DECLINING!


*


How can we increase livestock yields
How can we increase livestock yields?

hormone and antibiotic injections.

European Union (EU) banned use due to health concerns

BUT US/Canada still use practice


What is rbgh
What is rBGH?

  • Recombinant bovine growth hormone (rBGH)

  • synthetic (man-made) hormone

  • marketed to dairy farmers to increase milk production in cows.

  • used in the United States since it was approved by the Food and Drug Administration (FDA) in 1993, but its use is not permitted in the European Union, Canada, and some other countries.


Rangelands overgrazing
Rangelands & Overgrazing

  • What are rangelands?

    • Grassland ecosystems used to support livestock

    • Livestock eat shoots of plants (for food)& leave root system intact

    • CAN lead to overgrazing


Overgrazing
Overgrazing:

  • Organisms exceed carrying capacity

    • Increase soil erosion

    • Increase soil compaction

    • Desertification conditions


Can lead to undergrazing
Can lead to undergrazing

  • Likely in more arid areas, reduces net productivity as it does not stimulate growth


Overgrazing can lead to land degradation eventual desertification
Overgrazing can lead to land degradation & eventual desertification

Degradation

Desertification


How do we protect grasslands for livestock production
How do we protect grasslands for livestock production? desertification

Rangeland Management – works to control number of grazing animals as to not

exceed carrying capacity


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