UPDATE 1-China to hold second auction of pork reserves

* China to auction 10,000 T of frozen pork on Sept. 26 - notice

* Imported volumes are from countries including U.S., Germany

* Sale comes ahead of Oct. 1 holiday, after 1st auction last week (Adds background)

BEIJING, Sept 24 (Reuters) - China will auction 10,000 tonnes of imported pork from its state reserves on Sept. 26, according to a notice from the China Merchandise Reserve Management Center on Tuesday.

The auction of frozen pork is the second to be announced so far this month as China, the world's biggest consumer of the meat, looks to ease supply shortages and price spikes caused by the spread of African swine fever through its hog herd.

China's retail pork prices were up more than 80% year-on-year at 41.90 yuan ($5.90) per kg in the second week of September, while wholesale prices have also risen 80.9% to 36.39 yuan per kg.

The latest auction follows an earlier sale of 10,000 tonnes of reserve pork on Sept. 19, the results of which have not been made public.

It also comes in the week before China celebrates its National Day on Oct. 1, the start of a seven-day holiday in the country which sees many Chinese go out to eat in restaurants.

The meat on offer in the latest auction is from Chile, Denmark, France, Germany, the Netherlands, the United Kingdom and the United States, according to the notice. ($1 = 7.1027 Chinese yuan renminbi)

(Reporting by Tom Daly and Lusha Zhang; additional reporting by Shivani Singh; editing by Christian Schmollinger and Louise Heavens)