现代园林主要以绿色植物为主,其中树木是城市生态系中绿色空间的骨架和主体。为了适应城市复杂的立地条件并创造丰富多采的人工和自然景观,需要有数量多、质量好、种类丰富的苗木。所以园林绿化的树种比造林要丰富些。要提高各种树种的场圃发芽势和出苗率,种子催芽处理也是成败的关键。对于强迫休眠的树种子只要满足其萌发所需要适宜温度、水分、氧气、光照等条件,很快就会发芽出土。而对生理休眠的种子即使满足上述条件也不会很快发芽或仅少数发芽,出苗极不整齐。引起种子生理休眠的原因很复杂,对一种种子来说可能有一种原因,也可能有多种, The modern garden is mainly dominated by green plants, of which the trees are the skeleton and main body of the green space in urban ecosystem. In order to adapt to the city’s complex site conditions and to create a rich artificial and natural landscape, there is a need for a large number, good quality and rich variety of seedlings. Therefore, the afforestation of the tree species should be more afforestation. To raise the germination potential and emergence rate of various tree species, seed germination treatment is the key to success or failure. For forced dormancy tree seeds as long as they meet the germination of suitable temperature, moisture, oxygen, light and other conditions, will soon germinate unearthed. The seeds of physiological dormancy even if the above conditions are met will not germinate or only a small number of germination, very irregular emergence. The reason for the physiological dormancy of the seed is very complicated. There may be a reason for a seed or a variety of seed,