Special Feed for Swine May Help Farmers’ Crops, the Environment

Special Feed for Swine May Help Farmers’ Crops, the Environment
Research shows changing pigs' food may reduce phosphorus in the soil. Transcript of radio broadcast:
11 August 2008
This is the VOA Special English Agriculture Report.

Research shows that waste from pigs that are fed a special kind of corn may help a farmer's crops. And it also may help the environment. Any farmer who raises swine knows that pigs produce a lot of waste. This has both good and bad effects. Swine waste has nutrients like nitrogen that can help fertilize crops when it is placed on the fields. But the manure contents may not be what a crop needs. And removing too much manure can be a big job.

Soil scientist Brian Wienhold said most of the phosphorus in traditional corn fed to pigs is in the substance phytate. Pigs lack a chemical in their bodies to break down phytate. Most of the phosphorus in traditional corn feed passes through the animal without processing. It is expelled in the manure.

Placing the usual swine manure in the fields can increase the phosphorus content of the ground. And when rains cause the phosphorus to wash away, it can harm the environment.

But science may be able to solve the problem. A report on the subject recently appeared in the publication Soil Science Society of America Journal. The researchers are from the Agricultural Research Service of the United States Department of Agriculture and the University of Nebraska at Lincoln. They tested fields not far from the Nebraska cities of Lincoln and Hastings. They put three different substances on the fields: chemical fertilizer, manure from swine fed traditional corn diets and manure from swine fed low-phytate corn diets.

The scientists then compared how much nitrogen and phosphorus were available in the soil. They found that using slurry from swine fed low-phytate corn diets resulted in slower build-up of phosphorus in the soil. At the same time, it did not reduce the availability of the phosphorus to the crops.

Other scientists also have worked with low-phytate feed in recent years. For example, in research reported in two thousand four, University of Kentucky researchers gave pigs and chicks low-phytate feed. The substance phytase was added to the feed. The researchers said it helped break down the phytates.

And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. To learn more about agriculture, go to voaspecialenglish.com for transcripts and MP3 archives of our reports.

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

特别饲料的猪可以帮助农民作物，环境
研究表明，改变猪的食物可减少磷在土壤中。全文电台广播：
2008年8月11日
这是美国之音特别英语农业的报告。

研究表明，废物从猪是美联储一种特殊的玉米可以帮助农民的作物。它也可能有助于环境。任何农民谁引起猪都知道，猪产生了不少废物。这既有好的和坏的影响。猪废物的诸如氮等营养物，可以帮助施肥，作物时，把它放在对等领域。但粪肥的内容，未必是什么作物的需要。和消除过多的肥可能是一个很大的工作。

土壤科学家布赖恩wienhold说，大部分的磷在传统的玉米，联储猪是在实质植。猪缺乏一种化学品在他们的尸体分解植酸。大部分的磷在传统的玉米饲料经过动物未经加工。这是被驱逐的粪便。

配售一般猪粪在各个领域可以增加磷含量在地上。当下雨的原因，磷，以便洗去，它可以危害环境。

但科学可以解决这个问题。一关于这一主题的报告，最近出现在出版土壤科学学会，美国杂志。研究人员是从农业研究服务的美国农业部门和内布拉斯加大学的在林肯。他们测试领域的不远处，来自内布拉斯加州林肯市和黑斯廷斯。他们提出的3种不同的物质对领域：化肥，有机肥从猪美联储传统玉米饲料和肥料，从猪美联储低植酸玉米饲料。

科学家们然后相比有多大的氮和磷可在土壤中。他们发现，使用水泥浆从猪美联储低植酸玉米饲料，导致慢，积累了磷在土壤中。在同一时间内，它并未减少供货的磷向作物。

其他科学家也有与低植酸饲料在最近几年。例如，在研究报告在2000 4 ，肯塔基大学的研究人员给猪和鸡的低植酸饲料。实质植酸酶添加到饲料中。研究人员说，它有助于打破该phytates 。

这是该美国之音特别英语农业的报告，书面，由jerilyn沃森。若要了解更多关于农业，去voaspecialenglish.com誊本和MP3档案我们的报告。