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中國玉米進口量大增未必提振玉米價格（雙語）
Is corn the next soy bean?
玉米會成為當年的大豆嗎？
In 2001, China opened up its soybean industry to imports. Within three years, it moved from near-self sufficiency to being the world's largest importer. Now China is starting to look overseas for corn.
2001年，中國開放了大豆產業，允許大豆進口。三年內，中國從大豆接近自給自足變為全球最大的大豆進口國。現在，中國又開始在海外尋找玉米。
Rising incomes are whetting China's appetite for a better diet, meaning rising demand for corn. In the short term, increasing domestic production will be hard. Indeed, China imported 1.6 million tons of corn in 2010, up 18-fold from 2009. The U.S. Grains Council forecasts China will import four million to five million tons this year, equivalent to 5% of the global corn trade at a time of low stocks.
Getty Images中國開始尋求從海外市場進口玉米。收入的增加令中國人提高膳食標準的胃口大開，這也意味著對玉米的需求會增加。短期內增加國內產能非常困難。中國2010年進口了160萬噸玉米，是2009年的19倍。美國谷物理事會（U.S. Grains Council）預測，今年中國將進口400萬至500萬噸玉米。在眼下庫存很低的時候，這相當于全球玉米貿易量的5%。
Yet corn bulls may be too optimistic. Corn is at a record $7.80 a bushel in Chicago, in part because its use to make ethanol in the U.S. links it to high oil prices. Global prices, therefore, are 23% higher than in China. That price difference discourages imports. They are unlikely to rise significantly until that gap closes which could happen if, say, oil prices cool off or South American harvests are bigger than expected.
但因此看漲玉米價格未免過于樂觀。目前芝加哥商品交易所每蒲式耳玉米為7.80美元，這是因為高油價導致部分玉米被用作制造乙醇的原料。全球玉米價格因此比中國國內高出了23%。價差會抑制進口。除非價差能夠縮小，否則進口量不會大幅上升。而這也并非不可能發生：如果油價回落或南美玉米收成好于預期，價差自然會縮小。
Politics is another wild card. Beijing has been reluctant to allow commercialization of genetically modified seeds. Yet their adoption could help China increase its corn yield from 5.3 tons per hectare towards the 9.6 tons enjoyed in the U.S. If Beijing backs GM foods, and the Chinese public can be persuaded to eat them, they could also restrain imports.
而政治是另一個不確定的因素。中國政府一直不愿批準轉基因種子的商業化。但采用轉基因技術有助中國提高玉米產量，從當前每公頃5.3噸提高至美國的每公頃9.6噸的水平。如果中國政府支持轉基因食品，中國民眾也能夠接受并消費此類食品，那么這也會抑制玉米的進口。
High international prices in the short term and options to raise yields in the long term mean corn isn't yet in the same category as soy beans. An increase in imports isn't in doubt. Its extent and timing are.
短期內國際玉米價格高企以及長期內為了提高產量所面臨的選擇意味著玉米和大豆的情況并不相同。玉米進口量的增加確定無疑，但不確定的是增加的幅度以及開始的時間點。
【我要糾錯】 責任編輯：梓墨
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