关键词: 黄土高原, 黄土高原, 残塬沟壑区, 梯田, 重金属, 分布特征

Abstract:

Abstract: Based on the field survey data and the interviews of the farmers and other key-person, the paper compared the model of science and technology popularization in different rural regions in China. The results showed that the disseminator included the government, the group of science and technology, agricultural enterprise, scientific research institution, demonstrated farmers and volunteers. In rural, the investment and inspect and prompting mechanism of rural science and technology popularization has been found. At present, rural science and technology popularization based on the agricultural extension dominated by the government and depending on the rural community leaded by the government are the main models in the rural regions, but there are many limitations of these two models. According to result, the paper put forward that the model of commonweal combined industry will be the best model for the rural development, and this model has obtained large achievements.