抵抗性砧木, 抗性砧木

By Mario Ritter Broadcast: August 12, 2003 This is Bill White with the VOA Special English Agriculture Report. We often think of agriculture as planting seeds and harvesting crops. But many crops do n

发表于:2018-12-07 / 阅读(52) / 评论(0) 分类 VOA2003(下)-农业与经济

This is the VOA Special English Agriculture Report. These days, if we hear about two different plants being combined, the first thing we think of might is modern biotechnology. But the low-technology process of grafting remains an extremely important

发表于:2018-12-15 / 阅读(51) / 评论(0) 分类 VOA慢速英语2007年(一)月

By Ruth Reader Washington, DC 13 February 2008 There is growing concern around the world over illnesses caused by new antibiotic-resistant bacteria, or so-called superbugs, and the decreasing effectiveness of antibiotics to treat infections. Earlier

发表于:2019-01-07 / 阅读(67) / 评论(0) 分类 VOA常速英语2008年(二月)

Grafting is a way to produce plants from pieces of existing plants instead of seeds. Branches or buds are cut from one plant and placed on a related kind of plant. The branch or bud that is grafted is called the scion. The plant that accepts the graf

发表于:2019-01-12 / 阅读(60) / 评论(0) 分类 2010年VOA慢速英语(五)月

59 美国科学家正试图培育抗叶锈病小麦 DATE=6-19-01 TITLE=AGRICULTURE REPORT - Developing Wheat Resistant to Leaf Rust BYLINE=George Grow (Start at 59

发表于:2019-01-30 / 阅读(65) / 评论(0) 分类 科技之光

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 thin

发表于:2019-01-30 / 阅读(60) / 评论(0) 分类 农业与发展