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烧了7天还未扑灭加州山火起因究竟是什么？线索浮出水面_我的网站

泡沫之夏

A |

Yuzhu-1 Henan indigenous pig 15k breeding array Photo: Courtesy of Institute of Animal Husbandry and Veterinary Science of Henan Academy of Agricultural Sciences
China's largest pork-producing province has introduced a genomic breeding tool designed for indigenous pig breeding, a sign that the province is shifting from expanding volume toward improving hog quality.
The Henan Academy of Agricultural Sciences announced the launch of Yuzhu-1 Henan indigenous pig 15k breeding array - commonly known as a gene chip - developed by the pig breeding team at its Institute of Animal Husbandry and Veterinary Science. It is the first such tool customized for the province's native pig stock, the institute said on Monday.
Henan is home to multiple native pig breeds prized by consumers for their good flavor. However, they carry a commercial burden compared with imported lean-meat breeds, as they grow more slowly, consume more feed per kilogram of weight gain and deliver thinner margins, noted Xing Baosong, head of the pig research office at the institute.
Lifting those hurdles depends on sharper selection, which in local herds has long relied on visual assessment of physical traits, which is slow and imprecise. Genomic tools can speed things up, but mainstream commercial chips were built on imported breeds and lose accuracy on native Chinese stock. Yuzhu No 1 instead draws on whole-genome resequencing data from five of Henan's native pig breeds and two locally bred lines.
"In breeding we rely on estimated breeding values to judge an animal's genetic potential," Wang Ligang, a professor at the Institute of Animal Sciences under the Chinese Academy of Agricultural Sciences, told the Global Times on Monday. "An array matched to the breed makes that estimate more accurate. Previously there was a real chance we were selecting the wrong animals. Now we are far more likely to be selecting the right ones - and to select accurately for the traits a breed is known for, whether that is tender meat or high fertility."
The efficiency gap between native and imported pig breeds remains wide, said Wang, who is also with the Pig Branch of the Chinese Association of Animal Science and Veterinary Medicine. Feed conversion ratios for local Chinese pigs run around 3.0, against below 2.5 for imported breeds, while reaching 100 kilograms takes native pigs 180 to 190 days compared with 130 to 140 days for exotic lines, he said.
Despite this, China's native pig breeds have their advantages.
"Our pigs taste better, partly because they are raised longer," Wang said. "And they are far more robust. Exotic breeds can suffer heat stress and die in summer; when disease hits, they can go down in large numbers. Local pigs rarely do. They tend to recover. Some breeds in Northeast China can even tolerate severe cold."
He added that imported breeds drive efficiency, while native breeds ensure quality and offer a reservoir of genetic diversity for disease and stress resistance - traits that can be bred back into commercial lines.
The province slaughtered 64.74 million pigs in 2025, up 7.4 percent year on year, with pork output at 5.22 million tons, according to the provincial statistics bureau, making it the top pork and pig producer nationwide, according to industry statistics.
In the first half of 2026, pig slaughter in the province rose a further 6.4 percent, accelerating 5.3 percentage points from the first quarter, against national growth of 1.7 percent. Xing said that more high-quality local black pigs will reach the market as Yuzhu No 1 is applied more broadly.
Other major pig production provinces such as Southwest China's Sichuan, Northwest China's Shaanxi and South China's Yunnan have all developed their own arrays.
"Provinces with the most developed pig production are the ones pushing upmarket," Wang said. "Scale is no longer the only measure. If every province reaches this level, a pattern of one dedicated array per province could gradually take shape for China's native breeds."
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B | 美国加州南部山火已经持续肆虐一周，目前灭火工作仍然进展有限。山火已造成24人死亡，而接下来的不利天气条件可能将再次助长火势蔓延。

C | 山火已持续一周灭火工作仍进展有限据加州林业与消防局当地时间12日傍晚的数据，加州各地共有105起大大小小的山火，总过火面积超过163平方公里。规模较大的伊顿山火只有27%得到控制，帕利塞德山火仅有13%得到控制。

D | 山火已造成超过12300栋建筑被烧毁。目前，洛杉矶县已疏散15万居民，其中超过700人住在临时避难所中。在洛杉矶太平洋-帕利塞德地区，一段去年5月和今年1月10日拍摄的对比画面显示，山火导致很多地方已经被夷为平地，房屋化为废墟，树木也被烧焦。受灾居民阿维娃·科帕肯：实际上，我非常非常担心，我的房东每天都给我们更新信息，他一直说情况可能有变。我很害怕，因为如果情况真的改变了，说实话，我不知道我该去哪里。受灾居民艾伦·弗劳尔斯：我目前住在圣克鲁斯，我在2018年搬到那里时也曾遇上大火，所以我看到过类似的情况，整个城市和社区被烧毁，即使在六年之后，他们仍然在重建。所以我有些担心，担心我们现在的房子，还有我妈妈房子的未来。强风再次来袭或助推火势蔓延据美国媒体报道，季风“圣安娜风”13日将再次来袭，14日将是非常危险的一天。这可能将助长火势蔓延，甚至引发新的火灾，给灭火工作带来挑战。受灾居民苏珊娜·科尔达：每天早上醒来，我不知道我们的房子是否还在。这非常痛苦，我们非常担心接下来的几天“圣安娜风”再次来袭。加州大学洛杉矶分校气象学家丹尼尔·斯温：这些火灾已经震惊了我们，之后可能会以一些更加令人不适的方式，再次让我们感到震惊。因为在接下来的7到10天里，我们会看到更多助长火灾的极端天气条件。加州山火或为人为纵火？专家将实地勘察目前，美国调查人员正在调查洛杉矶山火的起因，调查方向包括人为纵火和电缆起火等常见起因。据美联社12日报道，调查人员已排除雷电引发山火的可能性，因为帕利塞德和伊顿两场山火涉及的区域均没有雷电报告。调查人员目前判定，帕利塞德山火的起火点位于彼德拉·莫拉达路旁的一处民宅后方，那里坐落于树木茂密的河谷之上。据美国《洛杉矶时报》12日报道，第一个打报警电话报告帕利塞德山火的人是住在彼德拉·莫拉达路附近的一位居民。这位居民说，他当时看到大火在距其房宅约三公里处升起。多名要求匿名的知情人士向《洛杉矶时报》披露，帕利塞德山火可能是人为纵火。

E | 美国酒精、烟草、火器和爆炸物管理局专家组定于13日开始实地勘察。调查人员关注的一个潜在起火区域是当地一处著名徒步景点的周边小径。那里常有游客光顾，跨年夜时曾爆发一起小型火灾，延烧数小时后被消防人员借助直升机洒水扑灭。据报道，加州公用事业委员会要求当地电力公司及时上报“可能关联野火的电力事故”，之后该委员会可介入调查事故中是否存在违法行为。不过，南加州爱迪生电力公司10日报告称，在该公司服务的帕萨迪纳附近山区，未发现迹象显示其设备与伊顿山火有关。