Poultry Farms With Unhappy Neighbors? Plant Some Trees

Poultry Farms With Unhappy Neighbors? Plant Some Trees
Scientists say just three rows of trees around chicken houses can reduce dust, ammonia and smells. Transcript of radio broadcast:
08 September 2008

This is the VOA Special English Agriculture Report.

Planting trees around poultry farms can improve air and water quality -- and please the noses of neighbors.

Scientists have shown that just three rows of trees near poultry houses can reduce the release of dust and ammonia. Trees can also reduce the strong odor of ammonia gas.

The trees capture dust, ammonia and odors in their leaves. They can also reduce energy use. They provide shade from the sun, reducing cooling costs in summer. And they act as a windbreak, reducing heating costs in winter.

Scientists say the trees can also improve water quality around farms by removing pollutants from soil and groundwater.

Several years ago, in the eastern United States, people were objecting to the odor of poultry farms on the Delmarva Peninsula. Delmarva is where the states of Delaware, Maryland and Virginia come together. Each of the two thousand farms there can house an average of seventy-five thousand chickens.

Traditionally the farms used windows to provide fresh air in the chicken houses. Farmers rarely planted trees or tall crops around the buildings, so there would be no barrier to the airflow.

But then farms began to use new ventilation systems. Instead of windows, the new systems used tunnel fans to circulate air. The fans directed airflow from the poultry houses toward the homes of neighbors.

A team led by George Malone at the University of Delaware began dealing with the problem in the year two thousand. The team recently presented a report at the national meeting of the American Chemical Society in Washington, D.C.

Over a period of six years, the scientists found that planting three rows of trees reduced total dust and ammonia by more than half. And they say the trees reduced odors by eighteen percent.

For the first row nearest the fans, they generally suggest using trees that lose their leaves in the fall or trees with waxy leaf surfaces. They suggest evergreen trees for the other two rows. Some trees work better than others. And what works in one area of the country may not work as well in other places.

Farmers may think trees will take too long to grow to be effective. But some trees can grow as fast as three meters a year.

Today, one-third of the Delmarva farms have planted trees, technically known as vegetative environmental buffers. These buffers can offer a way to cut pollution, save money and make the neighbors happy.

And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. I'm Jim Tedder.

----------------------------Google Translate

家禽农场与邻居不高兴呢？植物一些树木
科学家们说，刚才三排树木周围的鸡房子，可以减少粉尘，氨和气味。全文电台广播：
2008年9月8日

这是美国之音特别英语农业的报告。

种植树木周围的家禽农场，可以改善空气和水的质量-并请鼻子的邻居。

科学家已经证明，只是三排树木，附近的家禽房子，可以减少释放的尘埃和氨。树木还可以减少强烈的气味的氨气。

树木捕获尘埃，氨和气味，在他们离开。他们还可以减少能源的使用。他们提供遮荫从太阳，减少冷却成本在夏季。和他们作为防风林，降低取暖成本在冬季。

科学家们说，树木还可以改善水质靠近农场，清除污染物从土壤和地下水。

几年前，在美国东部时，人们反对气味的家禽农场，就delmarva半岛。 delmarva情况是，国特拉华州，马里兰州和弗吉尼亚州走到一起。每所2000农场有可以内务平均7.5万只鸡。

传统的农场使用的Windows提供新鲜的空气，在鸡房子。农民很少种植的树木或高大作物周围的建筑物，所以不会有任何障碍的气流。

但后来农场开始使用新的通风系统。而不是Windows ，新系统使用的隧道球迷流通空气。球迷针对气流从家禽房子对家的邻居。

所领导的设计小组乔治，马龙在特拉华大学开始处理这个问题，在2000年。小组最近提交了一份报告，在国家召开的美国化学学会在华盛顿哥伦比亚特区

一个时期六年，科学家们发现，种植三排树木，降低总粉尘和氨一半以上。和他们说，树木减少，气味由18 ％ 。

为第一行最接近的球迷，他们一般建议使用的树木，失去了他们的叶片将在今年秋季或树木与糯叶表面。他们建议常绿树木，至于其他两排。一些树木更好的工作比别人。什么工程，在一个地区，该国可能无法正常工作，以及在其他地方。

农民可能认为，树木将采取太长增长是有效的。但是，一些树木的成长一样快3米的一年。

今天，一三分之一的delmarva农场种植的树木，在技术上称为植物人环境缓冲区。这些缓冲器可以提供一种方式降低污染，节省金钱，使邻国感到高兴。

这是该美国之音特别英语农业的报告，书面，由jerilyn沃森。我吉姆tedder 。