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科学家研发出了产量更高、气候适应能力较强的“矮株玉米”

美联社
2024-10-02

在干旱问题日益严重的情况下,茎秆变小还可以减少用水量。

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在夏末的中西部乡间驾车,意味着要驶入玉米地带,在12英尺(约合3.66米)高繁茂的绿叶墙之间蜿蜒穿行,除了阳光和偶尔出现的水塔之外,这些绿叶墙似乎遮挡了一切。这种像摩天大楼一样的玉米是美国乡村的一部分,与洞穴般的红色谷仓和安静的奶牛一样。

但很快,那高耸的玉米可能会变成昔日身形的微缩版,被只有之前那些绿色巨型玉米一半高的茎秆所取代,而那些绿色巨型玉米长期以来一直在田间占据重要地位。

“当你开车穿越中西部时,也许在未来的七、八年、十年里,你会看到很多这样的情况。” 爱荷华州东部的一位农民卡梅伦·索根弗里(Cameron Sorgenfrey)说道,几年来他一直在种植这种新研发的矮株玉米,有时会引来邻近农民不解的目光。“我认为这将改变中西部的农业现状。”

拜耳作物科学(Bayer Crop Science)培育的这种矮株玉米正在中西部约3万英亩(12141公顷)的土地上进行试验,有望为农民提供能够抵御因气候变化而可能变得愈发频繁的强风暴的品种。这种玉米的株型较小,根部更加坚固,因此能够抵御时速高达50英里(约合80.5公里)的狂风——研究人员驾驶直升机在田地上空盘旋,观察植物如何应对狂风。

较小的植株还能让农民提高种植密度,这样他们就能在同样面积的土地上种植更多的玉米,从而增加利润。这对农民来说尤其有帮助,因为他们已经忍受了几年的低价格,而且预计这种低价格还将持续下去。

在干旱问题日益严重的情况下,茎秆变小还可以减少用水量。爱荷华州立大学(Iowa State University)助理教授迪奥·凯利(Dior Kelley)说,美国农民每年在大约9000万英亩(3600万公顷)的土地上种植玉米,通常使玉米成为该国最大的作物,因此再夸大大规模转向矮株玉米的重要性也不为过。凯利正在研究种植矮株玉米的不同途径。去年,美国农民种植了400 多吨(363公吨)玉米,其中大部分用于动物饲料、燃料添加剂乙醇或出口到其他国家。

凯利说:“这是一个重大的、根本性的转变。”

长期以来,研究人员一直致力于培育能够产出最多玉米的植物,但最近他们也同样重视其他性状,如使植物更耐旱或更耐高温。尽管人们已经在努力培育矮株玉米,但在 2020 年 8 月一场名为“德雷科”的强风暴席卷美国中西部之后,拜耳等私营公司和学术界科学家对创新的需求急剧上升。

这场风暴造成4人死亡,还造成110亿美元的损失,其中爱荷华州东部的大片地区受灾最为严重,那里的风速超过了100英里(约合160.9公里)/小时。在锡达拉皮兹等地,大风刮倒了数千棵树木,但对距离收获期仅有几周的玉米作物造成的破坏尤为惊人。

凯利说:“看起来就像有人拿着大砍刀把我们的玉米全部砍倒了。”

或者正如爱荷华州农民索根弗里所说的那样,“我的大部分玉米看起来都像是被碾压过一样。”

尽管凯利对矮株玉米的潜力感到兴奋,但她说,农民需要注意的是,玉米棒长得更靠近土壤可能更容易受到疾病或霉菌的侵害。凯利说,矮株玉米还容易受到倒伏的影响,即玉米在大雨后倾斜,然后沿着地面生长。

拜耳公司发言人布莱恩·利克(Brian Leake)说,该公司研发矮株玉米已有20多年的历史。其他公司,如Stine Seed和科迪华农业科技(Corteva),也已经有十年或更长的时间致力于提供矮株玉米品种。

虽然主要目标是培育能够抵御强风的玉米品种,但研究人员还指出,较短的茎秆使得农民更容易使用设备进入田间,完成诸如喷洒杀菌剂或播种未来覆盖作物等任务。

拜耳预计将在2027年提高产量,利克说,他希望到本世纪末,各地的农民都能种植矮株玉米。

他说:“我们看到了机会,这将成为美国和世界其他地区的新常态。”(财富中文网)

译者:中慧言-王芳

在夏末的中西部乡间驾车,意味着要驶入玉米地带,在12英尺(约合3.66米)高繁茂的绿叶墙之间蜿蜒穿行,除了阳光和偶尔出现的水塔之外,这些绿叶墙似乎遮挡了一切。这种像摩天大楼一样的玉米是美国乡村的一部分,与洞穴般的红色谷仓和安静的奶牛一样。

但很快,那高耸的玉米可能会变成昔日身形的微缩版,被只有之前那些绿色巨型玉米一半高的茎秆所取代,而那些绿色巨型玉米长期以来一直在田间占据重要地位。

“当你开车穿越中西部时,也许在未来的七、八年、十年里,你会看到很多这样的情况。” 爱荷华州东部的一位农民卡梅伦·索根弗里(Cameron Sorgenfrey)说道,几年来他一直在种植这种新研发的矮株玉米,有时会引来邻近农民不解的目光。“我认为这将改变中西部的农业现状。”

拜耳作物科学(Bayer Crop Science)培育的这种矮株玉米正在中西部约3万英亩(12141公顷)的土地上进行试验,有望为农民提供能够抵御因气候变化而可能变得愈发频繁的强风暴的品种。这种玉米的株型较小,根部更加坚固,因此能够抵御时速高达50英里(约合80.5公里)的狂风——研究人员驾驶直升机在田地上空盘旋,观察植物如何应对狂风。

较小的植株还能让农民提高种植密度,这样他们就能在同样面积的土地上种植更多的玉米,从而增加利润。这对农民来说尤其有帮助,因为他们已经忍受了几年的低价格,而且预计这种低价格还将持续下去。

在干旱问题日益严重的情况下,茎秆变小还可以减少用水量。爱荷华州立大学(Iowa State University)助理教授迪奥·凯利(Dior Kelley)说,美国农民每年在大约9000万英亩(3600万公顷)的土地上种植玉米,通常使玉米成为该国最大的作物,因此再夸大大规模转向矮株玉米的重要性也不为过。凯利正在研究种植矮株玉米的不同途径。去年,美国农民种植了400 多吨(363公吨)玉米,其中大部分用于动物饲料、燃料添加剂乙醇或出口到其他国家。

凯利说:“这是一个重大的、根本性的转变。”

长期以来,研究人员一直致力于培育能够产出最多玉米的植物,但最近他们也同样重视其他性状,如使植物更耐旱或更耐高温。尽管人们已经在努力培育矮株玉米,但在 2020 年 8 月一场名为“德雷科”的强风暴席卷美国中西部之后,拜耳等私营公司和学术界科学家对创新的需求急剧上升。

这场风暴造成4人死亡,还造成110亿美元的损失,其中爱荷华州东部的大片地区受灾最为严重,那里的风速超过了100英里(约合160.9公里)/小时。在锡达拉皮兹等地,大风刮倒了数千棵树木,但对距离收获期仅有几周的玉米作物造成的破坏尤为惊人。

凯利说:“看起来就像有人拿着大砍刀把我们的玉米全部砍倒了。”

或者正如爱荷华州农民索根弗里所说的那样,“我的大部分玉米看起来都像是被碾压过一样。”

尽管凯利对矮株玉米的潜力感到兴奋,但她说,农民需要注意的是,玉米棒长得更靠近土壤可能更容易受到疾病或霉菌的侵害。凯利说,矮株玉米还容易受到倒伏的影响,即玉米在大雨后倾斜,然后沿着地面生长。

拜耳公司发言人布莱恩·利克(Brian Leake)说,该公司研发矮株玉米已有20多年的历史。其他公司,如Stine Seed和科迪华农业科技(Corteva),也已经有十年或更长的时间致力于提供矮株玉米品种。

虽然主要目标是培育能够抵御强风的玉米品种,但研究人员还指出,较短的茎秆使得农民更容易使用设备进入田间,完成诸如喷洒杀菌剂或播种未来覆盖作物等任务。

拜耳预计将在2027年提高产量,利克说,他希望到本世纪末,各地的农民都能种植矮株玉米。

他说:“我们看到了机会,这将成为美国和世界其他地区的新常态。”(财富中文网)

译者:中慧言-王芳

Taking a late-summer country drive in the Midwest means venturing into the corn zone, snaking between 12-foot-tall green, leafy walls that seem to block out nearly everything other than the sun and an occasional water tower. The skyscraper-like corn is a part of rural America as much as cavernous red barns and placid cows.

But soon, that towering corn might become a miniature of its former self, replaced by stalks only half as tall as the green giants that have dominated fields for so long.

“As you drive across the Midwest, maybe in the next seven, eight, 10 years, you’re going to see a lot of this out there,” said Cameron Sorgenfrey, an eastern Iowa farmer who has been growing newly developed short corn for several years, sometimes prompting puzzled looks from neighboring farmers. “I think this is going to change agriculture in the Midwest.”

The short corn developed by Bayer Crop Science is being tested on about 30,000 acres (12,141 hectares) in the Midwest with the promise of offering farmers a variety that can withstand powerful windstorms that could become more frequent due to climate change. The corn’s smaller stature and sturdier base enable it to withstand winds of up to 50 mph — researchers hover over fields with a helicopter to see how the plants handle the wind.

The smaller plants also let farmers plant at greater density, so they can grow more corn on the same amount of land, increasing their profits. That is especially helpful as farmers have endured several years of low prices that are forecast to continue.

The smaller stalks could also lead to less water use at a time of growing drought concerns.

U.S. farmers grow corn on about 90 million acres (36 million hectares) each year, usually making it the nation’s largest crop, so it’s hard to overstate the importance of a potential large-scale shift to smaller-stature corn, said Dior Kelley, an assistant professor at Iowa State University who is researching different paths for growing shorter corn. Last year, U.S. farmers grew more than 400 tons (363 metric tonnes) of corn, most of which was used for animal feed, the fuel additive ethanol, or exported to other countries.

“It is huge. It’s a big, fundamental shift,” Kelley said.

Researchers have long focused on developing plants that could grow the most corn but recently there has been equal emphasis on other traits, such as making the plant more drought-tolerant or able to withstand high temperatures. Although there already were efforts to grow shorter corn, the demand for innovations by private companies such as Bayer and academic scientists soared after an intense windstorm — called a derecho — plowed through the Midwest in August 2020.

The storm killed four people and caused $11 billion in damage, with the greatest destruction in a wide strip of eastern Iowa, where winds exceeded 100 mph. In cities such as Cedar Rapids, the wind toppled thousands of trees but the damage to a corn crop only weeks from harvest was especially stunning.

“It looked like someone had come through with a machete and cut all of our corn down,” Kelley said.

Or as Sorgenfrey, the Iowa farmer who endured the derecho put it, “Most of my corn looked like it had been steamrolled.”

Although Kelley is excited about the potential of short corn, she said farmers need to be aware that cobs that grow closer to the soil could be more vulnerable to diseases or mold. Short plants also could be susceptible to a problem called lodging, when the corn tilts over after something like a heavy rain and then grows along the ground, Kelley said.

Brian Leake, a Bayer spokesman, said the company has been developing short corn for more than 20 years. Other companies such as Stine Seed and Corteva also have been working for a decade or longer to offer short-corn varieties.

While the big goal has been developing corn that can withstand high winds, researchers also note that a shorter stalk makes it easier for farmers to get into fields with equipment for tasks such as spreading fungicide or seeding the ground with a future cover crop.

Bayer expects to ramp up its production in 2027, and Leake said he hopes that by later in this decade, farmers will be growing short corn everywhere.

“We see the opportunity of this being the new normal across both the U.S. and other parts of the world,” he said.

财富中文网所刊载内容之知识产权为财富媒体知识产权有限公司及/或相关权利人专属所有或持有。未经许可,禁止进行转载、摘编、复制及建立镜像等任何使用。
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