1. Modern agricultural development is having a profound impact on the ecological environment. Farmers' production decisions and technology selection behaviors directly determine the impact of agricultural production on the ecological environment. The existing policies and institutional design have provided no or few incentives for environment-friendly choices of farmers.

2. The causes of agricultural non-point source pollution are complex. It is necessary to analyze the causes of non-point source pollution formation from four aspects of cultural tradition, policy arrangement, agricultural management mode and market and select the behaviors most closely related to the discharge of agricultural non-point source pollution, such as farmers' fertilization behavior, pesticide application behavior, comprehensive utilization of livestock manure and discharge behavior, etc., analyzing the formation mechanism of agricultural non-point source pollution.

3.At the current stage, it is necessary to seek solutions for agricultural source pollution control under the premise of promoting the sustainable development of agriculture and rural areas. Technological progress and institutional innovation are the fundamental ways to solve the problems of agricultural non-point source pollution. It includes encouraging the selection of environment-friendly technologies, designing institutional based on positive incentives, introducing market mechanism, improving policy of agricultural environment governance and implement the existing policies, etc.