- Establishment of parent stock plantations of desirable varieties and strains of fruit trees, certified as a source of scions, having as their function to supply nurseries with genetic material adapted to the region where the fruit trees will be grown;
- 建立适宜的果树品种和品系的母株种植园，这些母株是经过验证的嫩芽来源，它们将向苗圃提供适合果树种植地区的遗传物质；