50年代初,世界上许多FAO援助的工程,成功地应用了塑料或木质筒培育林苗技术。该项技术为难以发芽的树种创造了良好的生长环境。最近,在遮蔽条件下,有人用聚乙烯薄膜或粗麻布覆盖种子,在光照或黑暗条件下种子均能发芽(在猝倒病严重的地方,不覆盖),这项措施有利于施用可溶性肥料,间苗和剔除杂草工作,并能更充分地利用棚架空间。 容器育苗技术同样适用于温带树种。于是各种材料制成的筒迅速覆盖市场,在纽约用纸筒培育苗木;加利福尼亚林业工作者用柏油浸透的纸制作蛋圆形篓;加拿大的不列颠哥伦比亚大学的John Walters发明了子弹形状的塑料容器,用装有弹簧的“枪”射入 In the early 1950s, many of the world’s FAO-assisted projects successfully applied plastic or wood-tube cultivation techniques. This technique creates a good growing environment for difficult to germinate species. Recently, under shaded conditions, people covered the seeds with polyethylene film or burlap, and germinated the seeds under light or dark conditions (not covered in a place where the catching disease was severe). This measure is conducive to the application of soluble fertilizers, Shoots and weeds are removed and the shelf space can be more fully utilized. Container seedling technology also applies to temperate species. As a result, tubes of various materials quickly covered the market, raising nursery stock in paper tubes in New York; forestry workers in California made egg-shaped baskets of asphalt-impregnated paper; and John Walters of the University of British Columbia in Canada invented bullet-shaped plastic containers , With a spring-loaded “gun” injection