关键词: 移栽机, 穴盘苗, 自动取投苗

Abstract: The technology of automatic seedling picking and dropping is the key to the research of automatic transplanting machine, and it is an important part of promoting the comprehensive mechanization and automation of transplanting operations. There are many types of automatic seedling picking and dropping mechanisms with complex structures. In order to enable researchers or users and other relevant personnel to understand the automatic seedling picking and dropping technology faster and more systematically, this paper uses the method of literature review to automatically transplant seedlings in plug trays at home and abroad. The technology of picking and dropping seedlings is summarized and is divided into four types as follows: clipping type, ejecting type, combined topclamping type and straightfalling type. The working principle and characteristics of different types of seedling picking and throwing technology are analyzed. It points out that the research results of automatic seeding technology applied in actual production have problems of poor stability and low reliability, and proposes measures to improve the relevant evaluation standards, promote the research of mechanical seeding technology and the development of small mechanical equipment, and promote the development of multirow operation and efficient transplanting of seeding technology. The future development of automatic seedling picking and dropping technology with simple structure, stable performance and intelligent operation is prospected, so as  to provide a reference for the development of automatic transplanting machines in China.

Key words: transplanter, plug seedlings, automatic seedling picking and dropping