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杨树嫩枝插条,操作简单,成活率一般在90％左右,作业时间长(从5月下旬直到8月中旬),育苗成本低,除初期灌水次数较多外,管理也不太费工。更重要的是嫩枝插可以加速优良品种的繁育,一般一株2—3年生的幼树一年可采插穗20—30个,而对母树当年的高生长无太大影响。 5月底到6月初扦插,当年平均高可达1.5米,地径1.5厘米;麦收后接麦茬扦插,当年平均高生长82厘米,最高105厘米,地径0.76厘米;7月中旬以后插当年成活,第二年春季平茬,一般高生长4米左右。
Poplar shoots cuttings, simple operation, the survival rate is generally about 90%, long working hours (from late May until mid August), nursery low cost, in addition to the initial irrigation times more, the management is not too laborious . More importantly, shoots can speed up the breeding of fine breeds. Generally, a 2-3 year-old sapling can harvest 20-30 cuttings a year, while there is not much impact on the high growth of the mother tree. The end of May to early June cutting, when the average high of 1.5 meters, a diameter of 1.5 cm; wheat harvest followed by stubble cuttings, when the average growth of 82 cm, up to 105 cm, diameter 0.76 cm; mid- The next spring stubble, usually about 4 meters high growth.