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杨树如何扦插
更新时间: 2020-10-07 00:00:00  

1、使用苗干截制插穗时,苗干两端过细和过粗的插穗不宜采用,留用部分必须木质化程度高,芽饱满健壮,无病虫害;

2、采条时间在初春树液将要流动之前采集,随即将苗木下端泡入水中,使苗木充分吸水;

3、用锋利的刀截制插穗,插穗长度18至20厘米,粗度1至1、5厘米,插穗上端的第一个侧芽应完好,上切口与第一侧芽之间应有1厘米的间距。截制插穗时,将同一品种苗干上、中、下三个部位的插穗分别放置,分开育苗,避免出现以后苗木不整齐,大苗压小苗的现象;

4、插穗在扦插前应浸水3至4天,以增加插穗的含水量,并减少生根抑制物质,提高生根率;

5、将浸过水的杨树插穗垂直地直接插入松软的圃地土壤中,插穗上切口与地面相平或略高于地面,可稍踏实土壤,使土壤与插穗密接。

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