介绍了精确农业的产生，拓宽了21世纪精确农业的内涵；阐述发展我国精确农业的必要性和紧迫性；简要总结目前国内外精确农业的发展应用状况；并提出21世纪发展我国精确农业的对策。

手套针织横机的传动机构是一种串联式组合机构，它带动三角落座作往复运动，其机构参数直接影响横机的主要功能参数和工作性能。根据对该机构的运动学分析和所建立的数学模型，利用Visual Basic 6.0编制了运动模拟软件，用该软件可以对不同参数的主运动机构进行运动模拟和分析，模拟结果包括图形动态模拟、数值和运动曲线等到，通过高速摄像分析对模拟结果进行了验证，为全自动手套针织横机传动机构的设计和改进提供了有利的工具和理论依据。

In order that the mechanism designed meets the requirements of kinematics with optimal dynamics behaviors, a quadratic optimization method is proposed based on the different characteristics of kinematic and dynamic optimization. This method includes two steps of optimization, that is, kinematic and dynamic optimization. Mean while, it uses the results of the kinematic optimization as the constraint equations of dynamic optimization, This method is used in the parameters optimization of transplanting mechanism with elliptic planetary gears of high-speed rice seedling transplanter with remarkable significance. The parameters spectrum, which meets to the kinematic requirements, is obtained through visualized human-computer interactions in the kinematics optimization, and the optimal parameters are obtained based on improved genetic algorithm in the dynamic optimization. In the dynamic optimization, the objective function is chosen as the optimal dynamic behavior and the constraint equations are from the results of the kinematic optimization. This method is suitable for multi-objective optimization when both the kinematic and dynamic performances act as objective functions.