为了缩短育苗周期,提高育苗成活率,培育合格的良种壮苗,连续四年在平罗县对臭椿(Ailanthus altissima(Mill.)Swingle)、白腊(Fraxinus chinensis Roxb.)、国槐(Sophora japonica Linn.)和新疆杨(Populus alba var.pyramidalis Bge.)进行覆膜育苗试验,获得明显的成效。试验结果证明,覆膜育苗与露地育苗相比,具有成苗率高,苗木生长健壮整齐,抽干程度轻,周期可缩短一年,经济效益十分明显等特点,具有很大的推广价值。 In order to shorten the period of seedling raising, increase the survival rate of nursery seedlings and cultivate the qualified seedlings of elite seedlings, Ailanthus altissima (Mill.) Swingle, Fraxinus chinensis Roxb., Sophora japonica Linn.) And Populus alba var. Pyramidalis Bge. The test results show that compared with the open field nursery, the film nursery has the characteristics of high seedling rate, vigorous and tidy seedling growth, light dry degree, short cycle of one year and obvious economic benefits, which is of great promotion value.