乳苗抛栽是水稻种植的一种新方法。它是将水稻种子发芽后在适宜温度和阳光下培育出来的未展叶的绿色稻苗（简称乳苗）,直接抛撒在整好的稻田中。 背负式水稻乳苗抛秧机是针对水稻乳苗抛秧而设计的。它的原理是利用气力抛秧,不损伤秧苗,且抛撒均匀。其结构是在普通喷雾喷粉机配上一个专用抛秧盘。它可一机多用,既可以抛秧,又可进行喷雾、喷粉作业,具有体积小、结构简单、使用方便、造价低、重量轻、 Nursery throwing planted rice is a new method of cultivation. It is the unsprayed green rice seedlings (hereinafter referred to as the larvae) which are cultivated under suitable temperature and sunlight after germination of the rice seeds and directly thrown into the well-formed rice fields. Knapsack paddy rice seedling throwing machine is designed for rice seedling throwing seedlings. Its principle is to use pneumatic throwing seedlings, do not damage seedlings, and throwing evenly. Its structure is in the ordinary spray duster coupled with a special throwing tray. It can be a multi-purpose machine, both throwing seedlings, but also for spraying, dusting operations, with small size, simple structure, easy to use, low cost, light weight,