结合当前华北地区的政策、工程项目及近年苗木供需情况，预计2022年华北地区苗木的使用量会有所下降，约为20亿株。
Combined with the current policies, engineering projects and the supply and demand of seedlings in North China in recent years, it is expected that the use of seedlings in North China will decline to about 2 billion in 2022.
1.苗木供应严重过剩的有16种分别是：油松、侧柏、樟子松、杨树、沙棘、榆树、山杏、卫矛、云杉、叉子圆柏、垂柳、刺槐、落叶松、白皮松、丁香、女贞。
1. There are 16 kinds of seedlings with serious excess supply: Pinus tabulaeformis, Platycladus orientalis, Pinus sylvestris, poplar, seabuckthorn, elm, apricot, spear, spruce, Sabina vulgaris, weeping willow, Robinia pseudoacacia, larch, Pinus bungeana, clove and privet.
育苗建议：不宜继续发展。
Seedling raising suggestions: it is not suitable to continue to develop.
2.苗木供应相对过剩的有9种分别是：国槐、海棠、柠条锦鸡儿、白蜡、苹果、金叶榆、核桃、山桃、梨。
2. There are 9 kinds of seedlings with relative surplus supply: Sophora japonica, Begonia, Caragana Caragana, white wax, apple, elm, walnut, hickory and pear.
育苗建议：可以谨慎发展。
Seedling suggestion: it can be developed carefully.
3.苗木供需基本平衡的有3种分别是：葡萄、连翘、小檗。育苗建议：可以适当发展。4.苗木供应严重不足的有6种分别是：梭梭、中间锦鸡儿、丝绵木、圆柏、蒙古岩黄耆、小叶锦鸡儿。
3. There are three kinds of seedlings whose supply and demand are basically balanced: grape, Forsythia suspensa and Berberis. Seedling suggestion: it can be developed appropriately. 4. There are six kinds of seedlings that are seriously insufficient: Haloxylon ammodendron, Caragana intermedia, silk floss, juniper, Mongolian rock Astragalus, Caragana microphylla.