水杉,池杉、落羽杉(以下简称“三杉”)种源缺乏,当前主要采用无性繁殖培育苗木。我们从1977年以来,先后在本县的汪群、城北、孔桥、马甸、永安等公社林场进行嫩枝全光水插育苗试验,已先后培育“三杉”苗50多万株,水插平均成活率从70%提高到90%,最高达96%。夏季扦插苗木高生长量从20厘米提高到50厘米;成本费从每亩200元左右降低到15元以下。实践证明,水插育苗是一种多快好省的育苗方法。一、圃地选择和整地圃地宜选择地势平坦、肥沃,靠近水源的沙壤土为好。我们的试验证明:在沙壤土上扦插成活率达92.9%,苗木当年高生长达32厘米,最高56厘 Metasequoia, Ipomoea, Taxodium distichum (hereinafter referred to as “fir”) lack of provenance, the current main use of asexual breeding nursery stock. Since 1977, we have conducted all-photo shoot nursery shoot experiment in the afforestation forestry centers of Wangqun, Chengbei, Kongqiao, Madian, Yong’an and other communes in our county since 1997. We have cultivated more than 500,000 “San-fir” The average survival rate increased from 70% to 90%, up to 96%. Summer cutting seedlings high growth from 20 cm to 50 cm; cost per acre from 200 yuan to 15 yuan less. Practice has proved that water injection seedling is a fast and good province nursery method. First, the choice of land and land preparation Land should choose flat, fertile, sandy loam close to the water as well. Our experiment shows that the survival rate of cuttings in sandy loam reaches 92.9%, the growth of seedlings in that year is 32 cm and the highest is 56%