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欧美杨和美洲黑杨的根桩具有连续多年萌发的能力,适于留根育苗;另一方面,其幼年茎干内根源基发达,发生不定根的能力强,适于截根深栽。根据这两个特点我们从1982年以来先后四次在嘉鱼县不同立地条件下进行截根苗深栽试验,试验总面积460亩,在210亩土地上进行杨树留根育苗试验,以常规的插条育苗和带根苗造林为对照。试验研究结果表明:与常规插条育苗相比,留根育苗简化了育苗工序,节省种条,降低育苗成本,而且还提高苗木质量和出圃率;截根苗深栽的成活率高,生长比常规造林快,便于包装运输,节省运费。留根育苗及截根苗深栽是一项有效和适用的杨树育苗一造林系列技术。
Populus euphratica and Populus euphratica root piles have the ability to germinate for many years and are suitable for root nursery. On the other hand, their root base in juvenile stems is well developed, and adventitious roots are strong. According to these two characteristics, we have cut depth of cuttings four times since 1982 in different sites in Jiayu County. The total test area is 460 mu. The experiment of poplar root nursery is carried out on 210 mu land. Cuttings nursery and afforestation with root and shoot as a control. The results of the experiment showed that compared with the conventional seedling raising, the root-cutting seedling simplifies the seedling raising process, saves the seed and reduces the seedling cost, but also improves the nursery stock quality and the nursery yield. The survival rate of the cut seedling planting is higher than that of the conventional Afforestation fast, easy packaging and transportation, save shipping costs. Stay root nursery and truncated seedling deep planting is a valid and applicable poplar nursery an afforestation series technology.