油松是我省北部黄土高原区营造水土保持林的主要针叶树种之一。1978年,我们进行了油松塑料薄膜中棚营养土袋育苗试验。试验结果表明,采用该法育苗,种子萌发出土快,幼茎生长量大,根系发育完整,侧根粗壮,产苗量高,一年生苗木质量达到造林要求。试验证明,塑料薄膜营养袋育苗,是黄土高原地区多快好省的育苗方法之一.一、试验布设试验地设在我校教学实验农场苗圃,土壤属黄土母质发育的红油土,重粘质地, Pinus tabulaeformis is one of the main conifer species for soil and water conservation in the Loess Plateau in the northern part of our province. In 1978, we conducted a trial of oleaginous plastic film nursery nutrition bags. The results showed that seed germination by this method was quick, the seed germination was rapid, the growth of young stems was large, the root system developed well, the lateral roots were sturdy, the seedling production was high and the annual seedling quality reached the afforestation requirements. Experiments show that the plastic film nutrition bags nursery, the Loess Plateau is one of the more promising province nursery methods.First, the test layout test set up in my school teaching experimental farm nursery, the soil is loess parental development of red soil, heavy sticky texture,