农业综合板块12月16日跌1.63%，大禹节水领跌，主力资金净流出687.02万元

Group 1 - The agricultural sector index declined by 1.63% on December 16, with Dayu Irrigation leading the drop [1] - The Shanghai Composite Index closed at 3824.81, down 1.11%, while the Shenzhen Component Index closed at 12914.67, down 1.51% [1] - Key stocks in the agricultural sector showed mixed performance, with Runong Irrigation up by 0.59% and Dayu Irrigation down by 1.97% [1] Group 2 - The net outflow of main funds in the agricultural sector was 6.87 million yuan, while retail funds saw a net inflow of 3.30 million yuan [1] - Specific stock fund flows indicated that Dayu Irrigation experienced a significant net outflow of 7.02 million yuan, while Runong Irrigation had a net inflow of 0.55 million yuan [1] - The trading volume for key stocks included 54,500 shares for Runong Irrigation and 100,500 shares for Dayu Irrigation [1]