VOA慢速英语20060228a
时间:2019-01-02 作者:英语课 分类:2006年慢速英语(二)月
AGRICULTURE REPORT - Bird Flu: Composting the Remains 1 of Farm BirdsBy Mario Ritter
Broadcast: Tuesday, February 28, 2006
I'm Steve Ember with the VOA Special English Agriculture Report.
Farmers usually have to destroy all of their chickens and other birds if a case of bird flu is found. Then they face another difficult decision: What to do with the remains?
A government worker takes dead chickens to be burned on a farm outside Kano, Nigeria. Composting offers another way.
Some farmers choose composting. They avoid the danger of transporting infected birds, the cost of burning them and the risk that burial could pollute ground water.
Composting uses the natural action of microorganisms to break down organic 2 materials. Many agricultural extension 3 services explain ways to compost animal remains.
Composting must be carefully controlled. The balance of carbon and nitrogen 4 is very important. A correct nutrient 5 balance requires extra material like dry grass or pieces of wood. These materials are called bulking 6 agents.
Also, the compost must hold the right amount of water. Too little, and bacteria cannot do their job; too much, and air will not reach all the compost. The mixture should reach temperatures between fifty-seven and about sixty-three degrees Celsius 7.
If the pile begins to smell bad, this could be a sign that ammonia is building up. Adding the chemical ferrous sulfate can help solve this problem.
Experts say a simple way to compost farm birds is to create a windrow. A windrow is simply a mass of material. It should be three to four meters wide and about two meters high. It can be as long as space permits.
A windrow this size should contain three levels of birds, placed between layers of bulking agent.
Windrows should not be near be homes, animal shelters or water resources.
Experts say one thousand birds weighing a little over one kilogram each would need about ten cubic meters of bulking material. The material should be placed loosely so air can pass through it.
The windrow should take about one week to reach a high temperature. After another week to ten days, the temperature will begin to drop. At this point, the windrow must be turned.
Turn all the material completely. If it is too dry, add water. If it is too wet, add more bulking agent. Completely bury any bird remains that might be uncovered 8.
Experts say that after about three to four weeks more, the compost should be ready to use as fertilizer 9.
This VOA Special English Agriculture Report was written by Mario Ritter. Read and hear our reports at www.unsv.com. We also have a link to detailed 10 information from the University of Maryland on composting poultry 11. I'm Steve Ember.
- He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
- The remains of the meal were fed to the dog.残羹剩饭喂狗了。
- Organic farming is expanding everywhere.有机农业正在各地迅速发展起来。
- The organic fertilizer shall keep the soil in good heart.这有机肥一定会使土壤保持肥沃。
- The pupils disliked the extension of the term.小学生们不愿延长学期。
- Our extension is nearly finished.我们的扩建部分已接近完工。
- The atmosphere consist of more than 70% of nitrogen.大气中含有70%以上的氮气。
- What is the percentage of nitrogen in air?空气中所含的氮的比例是多少?
- Magnesium is the nutrient element in plant growth.镁是植物生长的营养要素。
- The roots transmit moisture and nutrient to the trunk and branches.根将水分和养料输送到干和枝。
- It'summed up the measures of controlling the sludge bulking too. 并归纳了污泥膨胀的控制措施。
- Lateral clinker bulking systems is set at the side of silos. 为方便熟料外运,库侧设有熟料散装系统。
- The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
- The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
- His head was uncovered. 他光着头。
- A plot to assassinate the banker has been uncovered by the police. 暗杀银行家的密谋被警方侦破了。 来自《简明英汉词典》
- Fertilizer enriches the soil.肥料使土壤肥沃。
- Get some more fertilizer for the garden.给花园再多施些肥料。
- He had made a detailed study of the terrain.他对地形作了缜密的研究。
- A detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。