落叶松是落叶乔木 ,树干高大通直 ,材质好 ,生长快 ,有“北方杉木”之称 ,是我国北方造林绿化的首选树种 ,每年需要大量的种苗。落叶松育苗 ,出苗期及生长初期至关重要。由于落叶松种子小 ,播种覆土薄 ,表土易干 ,地表温度升降快 ,且表土易被风吹走。而发芽、出苗和幼苗期 ,落 Larch is a deciduous tree, tall trunk straight, good material, fast growth, “North fir”, is the preferred tree species in afforestation in northern China, each year requires a lot of seedlings. Larix seedling, seedling and early growth is crucial. Due to the small larch seeds, sown thin soil, topsoil easy to dry, surface temperature rise faster, and the topsoil easily blown away. And germination, emergence and seedling stage, fall