苏联《森林业》杂志1965年12期50页报道苏联基洛夫州“苏维埃”林场近几年来采用木屑作苗圃播种地的覆盖物,取得很好的效果。1962年每公顷产1年生松苗284万株、产2年生松苗260万株;1964年也是如此;1965年每公顷产1年生松苗280万株,比一般的增产30%。所有这些苗木的质量都很高。用木屑覆盖播种地的好处很多,能保持土壤温度和湿度,保持土壤疏松、通气良好,能吸收大量降水, In the Soviet Union, “Forest Industry” magazine published a report on the use of woodchips for nursery sowing coverings in the “Kirkhofsvik” Soviet Union in the Soviet Union in recent years and achieved good results. In 1962, there were 2.84 million 1-year-old pine seedlings per hectare producing 2,600,000-year-old pine seedlings; the same is true in 1964; and in 1965, 2.8 million 1-year-old pine seedlings per hectare were produced, an increase of 30% over the average. All these seedlings are of high quality. Covering the sown area with sawdust has many benefits, can maintain soil temperature and humidity, keep the soil loose, good ventilation, can absorb large amounts of precipitation,