农业综合板块9月3日跌1.95%，大禹节水领跌，主力资金净流出2570.79万元

Group 1 - The agricultural sector experienced a decline of 1.95% on September 3, with Dayu Irrigation leading the drop [1] - The Shanghai Composite Index closed at 3813.56, down 1.16%, while the Shenzhen Component Index closed at 12472.0, down 0.65% [1] - Key stocks in the agricultural sector showed varying declines, with Runong Irrigation down 1.70%, Huilong Co. down 1.78%, and Dayu Irrigation down 2.16% [1] Group 2 - The agricultural sector saw a net outflow of 25.71 million yuan from institutional investors and 3.78 million yuan from retail investors, while retail investors had a net inflow of 29.49 million yuan [1] - Specific stock fund flows indicated that Huilong Co. had a net outflow of 10.32 million yuan from institutional investors, while Dayu Irrigation had a net outflow of 15.39 million yuan [1] - Retail investors showed a net inflow of 20.70 million yuan in Dayu Irrigation, indicating a contrasting trend in investor behavior [1]