时间:2019-01-13 作者:英语课 分类:VOA标准英语2010年(六)月


英语课

Victor Otazu, a aeroponic specialist with the International Potato Center, tends to some aeroponic potato plants in Nairobi, Kenya


Kenyans love to eat maize 1. It's the country's favorite food. But researchers at the Kenya Agricultural Research Institute are looking for ways to change that.


Is this what's in Kenya's future -- plants grown without soil, and in this case not maize, but the humble 2 potato?


Researchers from the Peru-based International Potato Center and the Kenya Agricultural Research Institute are conducting experiments on harvesting seeds from potato plants grown using aeroponic technology.


Seeds are germinated 3 in the laboratory. The seedlings 4 are then fixed 5 into holes cut out of Styrofoam sheets. And then after the seeds are developed further, they are harvested and distributed to farmers.


Soil often contains bacteria and other microorganisms harmful to potato plants. And seeds infected with viruses produce low potato yields.


"[With] aeroponic seed, we were able to produce 40 tons [of potatoes] per hectare," said Victor Otazu, a aeroponic specialist with the International Potato Center.  "Now, the farmers' seed only yields eight to 10 tons per hectare, so you can see the difference in yield production. If we are able to produce enough seed for all farmers we would be producing a lot of potatoes for Kenya."


Maize has been Kenya's staple 6 crop for ages. The researchers say that potatoes grown from the superior seeds of aeroponic technology could replace maize as Kenya's staple crop, and help to protect the country from droughts.


"I think we have relied on maize for a long time, us Kenyans," explained

Researcher Miriam Mbiyu.  "Bear in mind that potato is a short crop, it runs only for three months, and maize runs for the shortest five months and others, eight months, seven months. So we are trying to encourage farmers to get into this, at least to boost up our economy."


Farmer Derek Roulston likes the idea.


"If you have difficulty in drought, generally you will harvest something from potatoes, and it is very unlikely that you would get a complete crop failure, whereas with maize, in the last few weeks of production is when most of the yield is produced and it is more I would say drought-prone than potato crops," noted 7 Roulston.


But that might be a tough sell. For many Kenyans, their number one comfort food is a polenta-like dish called ugali, made from maize meal. Another favorite dish, a stew 8 of maize and beans called githeri, is equally central to the Kenyan diet.


A quick survey on the streets of the capital Nairobi bears this out.


MAN1: "Normally I consume the normal food of an African - that is maize, githeri, beans, meat."

MAN2: "Myself, I consume maize. As you can see, I am very strong. So it is only maize.

WOMAN: "I consume ugali. Yes. I consume ugali, I consume githeri. I am a Kikuyu so you see, maize will always be part of my life."

MAN3: "Personally I have been thinking it is high time for Kenyans to change. Me, I come from Vihiga District where potatoes are gaining momentum 9. So many people are switching - so many people are planting potatoes."


The aeroponic experiments are expected to be concluded in a year. Researchers say they aim to set up aeroponic units in other parts of the country, and to urge farmers to grow more potatoes and Kenyans to eat them.


 



n.玉米
  • There's a field planted with maize behind the house.房子后面有一块玉米地。
  • We can grow sorghum or maize on this plot.这块地可以种高粱或玉米。
adj.谦卑的,恭顺的;地位低下的;v.降低,贬低
  • In my humble opinion,he will win the election.依我拙见,他将在选举中获胜。
  • Defeat and failure make people humble.挫折与失败会使人谦卑。
v.(使)发芽( germinate的过去式和过去分词 )
  • First, the researchers germinated the seeds. 研究人员首先让种子发芽。 来自辞典例句
  • In spring they are germinated and grown for a year in beds. 春季里,他们在苗床发芽并生长一年。 来自辞典例句
n.刚出芽的幼苗( seedling的名词复数 )
  • Ninety-five per cent of the new seedlings have survived. 新栽的树苗95%都已成活。 来自《现代汉英综合大词典》
  • In such wet weather we must prevent the seedlings from rotting. 这样的阴雨天要防止烂秧。 来自《现代汉英综合大词典》
adj.固定的,不变的,准备好的;(计算机)固定的
  • Have you two fixed on a date for the wedding yet?你们俩选定婚期了吗?
  • Once the aim is fixed,we should not change it arbitrarily.目标一旦确定,我们就不应该随意改变。
n.主要产物,常用品,主要要素,原料,订书钉,钩环;adj.主要的,重要的;vt.分类
  • Tea is the staple crop here.本地产品以茶叶为大宗。
  • Potatoes are the staple of their diet.土豆是他们的主要食品。
adj.著名的,知名的
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
n.炖汤,焖,烦恼;v.炖汤,焖,忧虑
  • The stew must be boiled up before serving.炖肉必须煮熟才能上桌。
  • There's no need to get in a stew.没有必要烦恼。
n.动力,冲力,势头;动量
  • We exploit the energy and momentum conservation laws in this way.我们就是这样利用能量和动量守恒定律的。
  • The law of momentum conservation could supplant Newton's third law.动量守恒定律可以取代牛顿第三定律。
学英语单词
abamperes
Alfredia acantholepis
Allium sacculiferum
anaerobe
anaphylactic intoxication
aquae redestillata
assistant principal
attention-seekings
background luminance sensor
be all one to
blueishest
burrises
can't-wait
censorizing
co-managements
commandists
corticopupillary reflex
coyves
decay-affected selectivity
deluging
dentate fissure
development threshold
DEVGRU
dopiest
Downtownian
eccrine angiomatous nevus
electropneumatic positioner
english departments
estivoautumnal(malaria)
evenly distributed
federal governments
filling area
Fluoromebendzole
foraminite
furuncular diathesis
goddang
hanging down
having in
hear warning bells
heliozoans
Hydraulic Rams
hydrolytic cleavage
impropriety
in-yede
intracluster medium
island delta
kammes
Karagaylinskiy
lease-backs
leslie cheung
mass storage disc
Maytiguid I.
mel'nikov
membrane of stapes
microdicks
midgardsormen
mixture optimum
mournfullest
Myorelaxin
myselfe
nephelite (nepheline)
non-H share Mainland private enterprise
not ready for prime time
obsolete activity
ore extraction
ossa Sylvii
paper document
Passate
photodimer
plane up
population pyramid
portery
Pretty Prairie
progressive atrophe of bone
protective legislation
protohominids
pycnometric method
quantum energy table
reciprocating expansion-engine
resin blush
right side engine
sales van
scale trace
scribbling
single spark-plug ignition
sinistrality
solid nibium electrolytic capacitor
straight-line type automatic sampler
strong army horse
submarginally
subvariance
suppression of image signal
the KKK
the top flight
unvisored
Valkeala
vibrating-reed meter
When I die,the world dies with me.
When this is prescribed
whistlin
White's operation
Yambean