时间:2019-01-11 作者:英语课 分类:VOA慢速英语2008年(八)月


英语课

This is the VOA Special English Agriculture Report.
 
Hogs 1 at an Ohio farm


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 2 like nitrogen that can help fertilize 3 crops when it is placed on the fields. But the manure 4 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 5 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 6 and MP3 archives of our reports.


 



n.(尤指喂肥供食用的)猪( hog的名词复数 );(供食用的)阉公猪;彻底地做某事;自私的或贪婪的人
  • 'sounds like -- like hogs grunting. “像——像是猪发出的声音。 来自英汉文学 - 汤姆历险
  • I hate the way he hogs down his food. 我讨厌他那副狼吞虎咽的吃相。 来自辞典例句
n.(食品或化学品)营养物,营养品( nutrient的名词复数 )
  • a lack of essential nutrients 基本营养的缺乏
  • Nutrients are absorbed into the bloodstream. 营养素被吸收进血液。 来自《简明英汉词典》
v.使受精,施肥于,使肥沃
  • Fertilizer is a substance put on land to fertilize it.肥料是施在地里使之肥沃的物质。
  • Reading will fertilize his vocabulary.阅读会丰富他的词汇。
n.粪,肥,肥粒;vt.施肥
  • The farmers were distributing manure over the field.农民们正在田间施肥。
  • The farmers used manure to keep up the fertility of their land.农夫们用粪保持其土质的肥沃。
驱逐( expel的过去式和过去分词 ); 赶走; 把…除名; 排出
  • She was expelled from school at 15. 她15岁时被学校开除了。
  • After the outbreak of fighting,all foreign journalists were expelled. 战斗开始后,所有的外国记者都被驱逐出境。
n.抄本( transcript的名词复数 );转写本;文字本;副本
  • Like mRNA, both tRNA and rRNA are transcripts of chromosomal DNA. tRNA及rRNA同mRNA一样,都是染色体DNA的转录产物。 来自辞典例句
  • You can't take the transfer students'exam without your transcripts. 没有成绩证明书,你就不能参加转学考试。 来自辞典例句
学英语单词
-nese
1-naphthylamine hydrochloride
abjustment
Abū Rubayq
alkalinizations
amocarzine
arctic region
autocompounded current transformer
ayyub
azatropylidene
backlog depreciation
be enveloped in
beaumontoside
by right of something
chatham str.
cold dishes
conforming imputation
contingent transaction
cross tolerance
customerinquiry
dative sickness
dehorted
delay set counter
die arrangement for continuous compaction
direct-axis transient voltage
direness
dollar value at point of exportation
doublepressing
drinkings
dropping vessel
dry salted fish
duty of assured clause
ecosophers
ego trip
eructing
face masks
faint with
femaleless
fire-bucket
flexible shaft coupling
foredated
getting away
halmyrogenic
instantaneous cut
integrand
Kaschau
kinorhyncha
kiwifruit
lecturin'
lithophile element
local transaction program
Louis III
magnetic device
measure of transcendence
mileage recorder
militarus
molybdenum complex
myohypertrophia kymoparalytica
naphthalene poisoning
octal indication
open future
open-cavity
optical fiber measurement
period-to-date quantity adjusted
phase wave
phlebodium aureums
pinch-in effect
polluter-pays
proximal point algorithm
puccinia noli-tangere
Pull your chain
pycnanthemum virginianums
rattlers
read untrue
reeling furnace
relocatable linking loader
replays
sale fees
Saxifraga divaricata
semipolitician
side action
single shot trigger
single-sideband
sinopontius aesthetascus
sizing roller
soft snap
spooneristic
steady-state heating
supporter combustion
supporting information
tambay
tetanic induced current
TLC-scanner
trentepholia (mongoma) pennipes
Truth In-lending Act
undercut slope
unimanual palpation
unshunned
vibratory hopper feeder
welders' siderosis
with (an) effort
Zǎbrani