我场立江分场从1973年以来,年年进行杉木秋播育苗,苗木高大粗壮,病虫害少,抗旱、抗冻力强。为了进一步摸清秋播杉苗的造林效果,我们于1978年春进行秋播、春播杉苗造林试验。一、试验材料和方法秋播和春播杉苗按苗木高度各分为四级(见表1)。1978年2月下旬用表1中介绍的8种规格杉苗木进行造林,试验设计采用随机区组排 My field Lijiang sub-field since 1973, annual fir autumn nursery, seedlings tall and strong, less pests and diseases, drought, frost resistance and strong. In order to further find out the planting effect of autumn fir seedlings, we conducted autumn planting and spring planting fir seedlings in the spring of 1978. First, the test materials and methods Autumn seeding and spring seedlings fir seedling height is divided into four levels (see Table 1). In late February 1978 with the eight kinds of specifications described in Table 1 fir seedlings afforestation, experimental design using random block row