The history of the world according to corn - Chris A. Kniesly

2,545,587 views ・ 2019-11-26

TED-Ed


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翻译人员: Carol Wang 校对人员: Jiasi Hao
00:06
Corn currently accounts for more than one tenth of our global crop production.
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玉米目前占全球农作物 产量的 1/10 以上,
00:12
The United States alone has enough cornfields to cover Germany.
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仅美国的种植面积 就足以覆盖整个德国。
00:17
But while other crops we grow come in a range of varieties,
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但是,尽管我们种植的 其他作物品种繁多,
00:20
over 99% of cultivated corn is the exact same type: Yellow Dent #2.
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但超过 99% 的耕种玉米 都是一个品种:
黄马牙 2 号玉米。
00:28
This means that humans grow more Yellow Dent #2
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也就是说,人类种植的 黄马牙 2 号玉米
00:32
than any other plant on the planet.
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比地球上任何其它植物都多。
00:35
So how did this single variety of this single plant
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那么,这类植物的单一品种
00:38
become the biggest success story in agricultural history?
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如何成为农业史上最成功案例呢?
00:43
Nearly 9,000 years ago, corn, also called maize,
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约 9000 年前,
玉米首次从中美洲的原生草 玉蜀黍驯化而来。
00:47
was first domesticated from teosinte, a grass native to Mesoamerica.
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00:52
Teosinte’s rock-hard seeds were barely edible,
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玉蜀黍的坚硬种子 几乎无法食用,
00:56
but its fibrous husk could be turned into a versatile material.
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但它的纤维状皮 可做成用途广泛的材料。
01:01
Over the next 4,700 years, farmers bred the plant into a staple crop,
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在接下来的 4700 年中, 农民将这种植物培育成主食,
01:07
with larger cobs and edible kernels.
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玉米穗轴更大,且谷粒可食。
01:10
As maize spread throughout the Americas, it took on an important role,
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随着玉米传遍整个美洲, 它发挥了重要作用,
01:14
with multiple indigenous societies revering a “Corn Mother”
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被多个土著部落誉为
01:18
as the goddess who created agriculture.
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“玉米母亲”,
即创造农业的女神。
01:21
When Europeans first arrived in America, they shunned the strange plant.
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当欧洲人第一次抵达美国时, 他们避开了这种奇怪的植物。
01:26
Many even believed it was the source of physical and cultural differences
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许多人甚至认为,
这是其与中美洲人之间 物质和文化差异的根源。
01:30
between them and the Mesoamericans.
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01:32
However,
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01:33
their attempts to cultivate European crops in American soil quickly failed,
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他们尝试在美国土地上 种植欧洲农作物,
但很快就失败了,
01:38
and the settlers were forced to expand their diet.
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这些定居者被迫扩大饮食范围。
01:41
Finding the crop to their taste, maize soon crossed the Atlantic,
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他们发现玉米符合自己的口味后, 玉米很快就抵达大西洋彼岸。
01:45
where its ability to grow in diverse climates made it a popular grain
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玉米适应各种气候的生长的能力
使其成为受许多欧洲国家欢迎的谷物。
01:50
in many European countries.
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01:52
But the newly established United States was still the corn capital of the world.
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但是,新成立的美国 仍然是世界玉米之都。
01:58
In the early 1800’s, different regions across the country
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在 19 世纪初期,
全国不同地区生产出 大小和口味各异的玉米。
02:01
produced strains of varying size and taste.
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02:05
In the 1850’s, however,
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然而,在 19 世纪 50 年代,
02:07
these unique varieties proved difficult for train operators to package,
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对火车运营商来说, 很难对这些独特品种进行包装,
02:12
and for traders to sell.
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对商人来说,也很难出售。
02:14
Trade boards in rail hubs like Chicago encouraged corn farmers
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芝加哥等铁路枢纽贸易委员会
02:18
to breed one standardized crop.
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鼓励玉米种植者 种植一种标准化作物。
02:20
This dream would finally be realized at 1893’s World’s Fair,
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这一梦想最终在 1893 年的 世界博览会上得以实现,
02:26
where James Reid’s yellow dent corn won the Blue Ribbon.
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詹姆斯 · 里德(James Reid)的黄马牙玉米 在会上赢得了蓝丝带奖。
02:31
Over the next 50 years, yellow dent corn swept the nation.
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在接下来的 50 年中, 黄马牙玉米席卷整个美国。
02:35
Following the technological developments of World War II,
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随着二战期间的技术发展,
02:38
mechanized harvesters became widely available.
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机械收割机开始广泛普及。
02:41
This meant a batch of corn that previously took a full day to harvest by hand
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这意味着以前人工一天所收获的玉米,
02:46
could now be collected in just 5 minutes.
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现在只需 5 分钟就收获完毕。
02:49
Another wartime technology, the chemical explosive ammonium nitrate,
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另一种战时技术化学炸药硝酸铵,
02:54
also found new life on the farm.
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在农场也找到了新用途。
02:57
With this new synthetic fertilizer,
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有了这种新的合成肥料,
02:59
farmers could plant dense fields of corn year after year,
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农民就可以年复一年地 在地里密集种植玉米,
03:03
without the need to rotate their crops and restore nitrogen to the soil.
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无需轮作种植以恢复土壤中的氮。
03:07
While these advances made corn an attractive crop to American farmers,
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尽管这些进步使玉米 成为美国农民喜欢种植的作物,
03:12
US agricultural policy limited the amount farmers could grow
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但为确保玉米高售价,
美国农业政策 限制了农民种植玉米数量。
03:16
to ensure high sale prices.
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03:18
But in 1972, President Richard Nixon removed these limitations
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但是在 1972 年,理查德 · 尼克松总统 (Richard Nixon)取消了这些限制,
03:23
while negotiating massive grain sales to the Soviet Union.
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同时谈判向苏联出售大量谷物。
03:27
With this new trade deal and WWII technology,
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通过这项新的贸易协议 和二战期间的技术,
03:30
corn production exploded into a global phenomenon.
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玉米产量猛增成为全球现象。
03:35
These mountains of maize inspired numerous corn concoctions.
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大量的玉米催生了无数玉米制品。
03:39
Cornstarch could be used as a thickening agent for everything from gasoline to glue
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玉米淀粉可用作增稠剂, 从汽油到胶水都有使用,
03:44
or processed into a low-cost sweetener known as High-Fructose Corn Syrup.
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也可以加工成低成本的甜味剂, 称为高果糖浆。
03:50
Maize quickly became one of the cheapest animal feeds worldwide.
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玉米迅速成为全球 最便宜的动物饲料之一,
03:55
This allowed for inexpensive meat production,
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这使得肉类生产成本降低,
03:57
which in turn increased the demand for meat and corn feed.
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进而增加了对肉类 和玉米饲料的需求。
04:01
Today, humans eat only 40% of all cultivated corn,
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如今,人类食用的玉米 仅占所有种植量的 40%,
04:06
while the remaining 60% supports consumer good industries worldwide.
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而其余 60% 支持全球消费品行业。
04:12
Yet the spread of this wonder-crop has come at a price.
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然而,这种神奇作物的传播 也付出了相应代价。
04:16
Global water sources are polluted by excess ammonium nitrate from cornfields.
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玉米田中过量的硝酸铵 污染了全球水源,
04:21
Corn accounts for a large portion of agriculture-related carbon emissions,
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与农业有关的碳排放中, 玉米占了很大比例,
04:26
partly due to the increased meat production it enables.
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部分原因是,它增加了肉类产量。
04:29
The use of high fructose corn syrup may be a contributor to diabetes and obesity.
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高果糖浆的使用, 可能是糖尿病和肥胖症的病因。
04:35
And the rise of monoculture farming
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单一农作物种植模式的兴起,
04:37
has left our food supply dangerously vulnerable to pests and pathogens—
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使我们的食品供应极易 受到病虫害和病原体的侵害——
04:42
a single virus could infect the world’s supply of this ubiquitous crop.
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单一病毒可能会感染这种 无处不在的农作物的全球供应。
04:48
Corn has gone from a bushy grass
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玉米已由丛生禾草
04:51
to an essential element of the world’s industries.
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成为世界工业的重要组成部分,
04:54
But only time will tell if it has led us into a maze of unsustainability.
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但是,只有时间才能证明, 它是否令我们陷入了不可持续的迷宫。
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