BEIJING, April 1 (Reuters) - China soymeal futures fell 6% on Friday, the biggest daily decline in 10 years, on a forecast for record U.S. soybean plantings and a release of state reserves by Beijing.

The most actively traded soymeal futures on Dalian Commodity Exchange tumbled to 3,816 yuan ($600.59) per tonne, their lowest level in more than a month. This week, the market fell 13%.

"Prices have been falling (in recent days). Then there was the plantings report released yesterday," said Zhu Rongping, analyst with the agriculture section of Mysteel, a China-based commodity consultancy.

"China released soybeans from the state reserves today. Soybean arrivals in April and May were also expected to be abundant," Zhu said.

The U.S. Department of Agriculture's (USDA) plantings intention report on Thursday showed U.S. farmers would dedicate the most acres on record to plantings of the oilseed this spring, while reducing corn acres.

China released 500,000 tonnes of soybeans from its state reserves on Friday, in an effort to increase supplies.

China's soymeal prices rallied to record highs in March on tight bean supplies as bad weather in South America limited exports.

The recent surge of COVID-19 cases in China and measures put in place to contain the disease also restricted transport of soymeal, the key protein ingredient in animal feed, bolstering prices, traders said.

"Prices were too high anyway," said a trader based in northern China. "Many crushing plants have now resumed operation as more beans arrived, while demand is flat due to bad farming profits."

Cash prices of soymeal in Shandong province dropped 10% in the past two weeks, to 4,600 yuan per tonne as of Thursday. On the day alone, they fell 80 yuan.

"If you get soymeal from the crusher in the morning, before you reach your plant in the afternoon, prices have already fallen," said the trader.

The fall was expected to continue, analysts and traders said, as more beans arrive in China and demand from the livestock sector remains weak.

Pig farmers in Henan, a main producer in northern China, are losing more than 400 yuan per hog raised.

($1 = 6.3537 Chinese yuan renminbi) (Reporting by Hallie Gu and Dominique Patton Editing by Mark Potter)