AGRICULTURE REPORT - Who Needs Seeds? The Secret of Seedless

AGRICULTURE REPORT - Who Needs Seeds? The Secret of Seedless Fruits
By Mario Ritter

Broadcast: Tuesday, August 09, 2005

 
 

I'm Faith Lapidus with the VOA Special English Agriculture Report.

We often think of agriculture as planting seeds and harvesting crops. But many crops do not come from seeds. Many kinds of trees and plants are grown from pieces cut from existing trees and plants. This is called grafting².

Farmers cut branches or young growths, called buds, from one plant and place them on a related kind of plant. The branch or bud that is grafted³ is called a scion⁴ (pronounced SY-uhn). The plant that accepts the graft¹ is called the root stock.

Over time, the parts from the two plants grow together. The grafted plant begins to produce the leaves and fruit of the scion, not the root stock.

A graft can be cut in several ways. A cleft⁵ graft, for example, requires a scion with several buds on it. The bottom of the scion is cut in the shape of the letter V. A place is cut in the root stock to accept the scion. The scion is then securely placed into the cut on the root stock. Material called a growth medium is put on the joint⁶ to keep it wet and help the growth.

Grafting can join scions⁷ with desirable qualities to root stock that is strong and resists disease and insects. Smaller trees can be grafted with older scions. The American Environmental Protection Agency says grafting can reduce the need to use pesticides⁸ on crops. The E.P.A. found that grafting stronger plants cost less than using chemicals. Also, poisons can be dangerous to people and the environment.

Agriculture could not exist as we know it without grafting. Many fruits and nuts have been improved through this method. Some common fruit trees such as sweet cherries and McIntosh apples have to be grafted.

Bing cherries, for example, are one of the most popular kinds of cherries. But a Bing cherry tree is not grown from seed. Branches that produce Bing cherries must be grafted onto root stock. All sweet cherries on the market are grown this way.

And then there are seedless fruits like navel oranges and seedless watermelons. Have you ever wondered how farmers grow them? The answer is: through grafting.

The grapefruit tree is another plant that depends on grafting to reproduce. Grapes, apples, pears and also flowers can be improved through grafting. In an age of high-technology agriculture, grafting is a low-technology method that remains⁹ extremely important.

This VOA Special English Agriculture Report was written by Mario Ritter. Our reports are on the Web at www.unsv.com. I'm Faith Lapidus.

1 graft   

n.移植，嫁接，艰苦工作，贪污；v.移植，嫁接

参考例句：

• I am having a skin graft on my arm soon.我马上就要接受手臂的皮肤移植手术。
• The minister became rich through graft.这位部长透过贪污受贿致富。

2 grafting   

嫁接法，移植法

参考例句：

• Even grafting new blood vessels in place of the diseased coronary arteries has been tried. 甚至移植新血管代替不健康的冠状动脉的方法都已经试过。
• Burns can often be cured by grafting on skin from another part of the same body. 烧伤常常可以用移植身体其它部位的皮肤来治愈。

3 grafted   

移植( graft的过去式和过去分词 )； 嫁接； 使（思想、制度等）成为（…的一部份）； 植根

参考例句：

• No art can be grafted with success on another art. 没有哪种艺术能成功地嫁接到另一种艺术上。
• Apples are easily grafted. 苹果树很容易嫁接。

4 scion   

n.嫩芽，子孙

参考例句：

• A place is cut in the root stock to accept the scion.砧木上切开一个小口,来接受接穗。
• Nabokov was the scion of an aristocratic family.纳博科夫是一个贵族家庭的阔少。

5 cleft   

n.裂缝；adj.裂开的

参考例句：

• I hid the message in a cleft in the rock.我把情报藏在石块的裂缝里。
• He was cleft from his brother during the war.在战争期间，他与他的哥哥分离。

6 joint   

adj.联合的，共同的；n.关节，接合处；v.连接，贴合

参考例句：

• I had a bad fall,which put my shoulder out of joint.我重重地摔了一跤，肩膀脫臼了。
• We wrote a letter in joint names.我们联名写了封信。

7 scions   

n.接穗，幼枝( scion的名词复数 )；（尤指富家）子孙

参考例句：

• Eldritch giants are powerful scions of arcane lore. 邪术巨人是神秘奥术知识的强大传承者。 来自互联网
• Grafting can join scions with desirable qualities to root stock that is strong and resistsand insects. 嫁接能够将理想质量的接穗嫁接到强有力抗病虫害的砧木上。 来自互联网

8 pesticides   

n.杀虫剂( pesticide的名词复数 )；除害药物

参考例句：

• vegetables grown without the use of pesticides 未用杀虫剂种植的蔬菜
• There is a lot of concern over the amount of herbicides and pesticides used in farming. 人们对农业上灭草剂和杀虫剂的用量非常担忧。 来自《简明英汉词典》

9 remains   

n.剩余物，残留物；遗体，遗迹

参考例句：

• 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。