国内商品期货主力合约开盘涨跌不一，沪银涨超2%，烧碱涨超1%

Group 1 - The domestic commodity futures market opened with mixed results on September 1, with silver rising over 2% and caustic soda increasing by more than 1% [1] - In terms of declines, coking coal and pure alkali fell by more than 2%, while glass and cotton dropped nearly 2% [1] - Other commodities such as rebar, iron ore, coking coal, Shanghai tin, and hot-rolled coil experienced declines of over 1% [1]