理想的覆土材料是提高出苗率的先决条件。为了创造这一条件,寻找一种比现行覆盖材料更为理想的材料,近年来许多育苗工作者做了不少尝试,例如:用草炭、锯末、马粪等。这些材料虽然较之单一床土为好,但覆盖厚度不易掌握,难于做到厚薄均匀。为了解决这个难题,汤原县第一苗圃和我们先后进行了纱布代替覆土材料的育苗试验。试验总面积80平方米,历经两个栽培年,现将试验情况介绍 The ideal casing material is a prerequisite for raising the germination rate. In order to create this condition and look for a material which is more ideal than the current covering material, many seedling raising workers have done a lot of attempts in recent years, for example, using peat, sawdust, horse manure and the like. Although these materials are better than a single soil bed, but not easy to grasp the thickness of the cover, it is difficult to achieve uniform thickness. In order to solve this problem, Tangyuan County first nursery and we have conducted a gauze instead of soil cover material nursery test. Test a total area of ​​80 square meters, after two years of cultivation, the test is now introduced