Animal feed is the biggest cost for most cattle producers. In the United States, the cost of hay, grains and other feed has risen sharply because of a drought. At the same time, wildfires this year burned more than a million hectares of North American rangeland.
Jack Field raises cattle in the northwestern state of Washington. To save money, he made plans to truck his small herd of cows three hundred kilometers to feed on crop stubble. Crop stubble is what remains after crops have been harvested.
Moving his cattle from farm to farm costs money and time. But he says if he can avoid feeding them hay, he can still make a profit.
Tim DelCurto is a beef scientist at Oregon State University. He is working with ranchers and feedlot owners to help them find lower cost ways to feed cattle. He says cattle can eat things like grass-seed straw and distillers grains. These grains are left over from ethanol fuel production.
He says cattle can also eat cannery waste and items rejected by vegetable processors -- like misshapen green beans, carrots, even French fries.
"Now I think one of the unique attributes of beef cattle -- and sheep would fit this, too -- is that they can virtually digest anything."
The rising cost of feed has led agricultural research universities to give greater attention to what experts call "feed efficiency." The University of Idaho has a cattle barn where sensors measure exactly how much food each cow eats.
Professor Rod Hill says just because animals are growing at the same rate does not mean they eat the same amount of food. In fact the difference in how efficiently their bodies convert feed into meat, fat, bone and hide might be surprising.
"These animals are -- for your eye and mine -- they look quite homogenous. But the variation in intake for animals growing at the same rate is of the order of thirty-five percent."
This is a case where humans and animals have something in common.
"You know, we talk to people who say, 'All I have to do is, is, is look at the candy store and, and I put on three pounds.' We don't actually quantify it so precisely in humans, but we know in humans that some people can eat a little and they can put on quite a bit of weight and some people can eat a lot and hardly put on any weight. So it's a biological phenomenon."
Rod Hill says ranchers can use selective breeding to get the same growth with less feed. But he says not to focus too much on one thing, like reducing fat.
"Less-efficient animals are slightly fatter, and more-efficient animals are slightly leaner. So we wouldn't want to just go after efficiency and then forget about the body composition. So, we wouldn't want animals to become too lean, so that might reduce marbling in the product, especially in the quality cuts where the profit is."
《品味时尚》
纽约市将用紫外线灯对公交地铁进行消杀
品味时尚
Should College Students Take Part in the Course Beyond Their Major? 是否应该参加专业以外的课程?
The Way to Success 关于成功之路
弯道超越
抓住机遇,成就伟岸
独一无二
体坛英语资讯:South American football in no rush to restart
Dependency on Cell Phone 手机依赖症
青山一道同风雨
责任让人美丽
《品味时尚》
9年全国Ⅰ卷高考满分作文
知之·行之·思之
《隐形的翅膀》
《品味时尚》
别拿常识不当干粮
踮起脚尖
踮起脚尖
国际英语资讯:U.S. says pulling out of Treaty on Open Skies
体坛英语资讯:Dani Alves still the worlds best right-back, says Sao Paulo coach
国内英语资讯:China to complete poverty alleviation goals on schedule: spokesperson
熟悉——依然
找准位置发扬自我
国内英语资讯:China, U.S. should insist on non-conflict, non-confrontation: spokesperson
说说我们90后
踮起脚尖
体坛英语资讯:Kobe and Baumann among latest inductees into 2020 Basketball Hall of Fame
我与故事
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |