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一、插穗选择及处理杨树插穗应选用生长健壮、无病虫害、木质化程度高、1年生苗枝作种条,插穗直径1.5~2.0厘米,长15~18厘米,具有3~5个健壮芽。用锋利剪刀截条,切口平滑,不破皮,不劈裂,不伤芽,上切口平齐,距第1个芽上端1厘米,确保插穗上端第1个芽完整,下切口成马蹄形,上端选在1个芽的基部,切削成45°,注意勿使切口破裂。插苗前,插穗用生根粉处理,可提高插穗成活率,将插穗用50%多菌灵和15%甲基托布津按1:1比例混合液浸根1～2小时,可有效防治根腐病和黑斑病。二、苗圃地选择和整地育苗地应选地势平坦、背风向阳、排灌条件便利、土壤肥跃,疏松透气的壤土或沙壤土,土层厚度1
First, cuttings selection and processing Poplar cuttings should be used to grow robust, disease-free pests, high degree of lignification, 1 year old seedlings for planting strips, cutting 1.5 to 2.0 cm in diameter, length 15 to 18 cm, with 3 to 5 robust bud . Cut with a sharp scissors, incision smooth, not broken skin, not splitting, do not hurt the bud, the incision flush, 1 cm from the top of the first bud to ensure that cuttings on the top of a complete bud, undercut into a horseshoe-shaped, the top election In the base of a bud, cut 45 °, careful not to rupture the incision. Before cutting seedlings, cuttings with rooting powder treatment, can improve the survival rate of cuttings, cuttings with 50% carbendazim and 15% thiophanate-methyl mixture of 1: 1 ratio of root immersion 1 to 2 hours, can effectively prevent root rot Diseases and melasma. Second, nursery selection and land preparation Seedling should be flat topography, leeward sunny, irrigation and drainage conditions, soil fertility, loose and breathable loam or sandy loam, soil thickness 1