为了解决日本落叶松在辽宁东部山区育苗木质化问题,从而实现一年生苗木上山造林,我圃今春进行了日本落叶松塑料薄膜大棚育苗试验。通过试验,小苗生长旺盛,发育健壮。苗木的平均高为30.7厘米,最高可达59厘米;平均地径为0.34厘米,最粗可达65厘米。根系发达,根长平均达19.8厘米,侧根均在10条左右,分枝数均为13.8个,且 In order to solve the problem of lignification of Larix kaempferi in mountainous area of ​​eastern Liaoning in order to achieve annual tree seedling uphill afforestation, we conducted spring nursery trial of Japanese larch plastic film greenhouse. Through experiments, seedlings grow vigorously and develop robust. The average seedling height of 30.7 cm, up to 59 cm; average diameter of 0.34 cm, the most up to 65 cm. Roots developed, the average root length of 19.8 cm, lateral roots are about 10, the number of branches were 13.8, and