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“深沟大垄直插法”是我场苗圃林区“三结合”科研小组在毛白杨扦插繁殖实验中创造的一种扦插作业法。1975年该林区的七个扦插实验项目用“深沟大垄直插法”插条6358节,取得了总平均成活69.5％的成绩。其中,春现取条现插的,5节平均成活率达78％,超过了省毛白杨育苗协作会议上提出的指标,马粪冬藏的8节平均成活率达70.9％;1米以下等外条基1节成活率最高的达75.3％,两节平均最高的达72.7％(春现取现插和冬沙藏着插),均刷新了我场历年纪录。成活率最低的冬沙藏合格条,4节平均61.3％,8节平均54.8％,也达到或超过了过去纪录。同一般平畦扦插比较,就今年实验结果看,新法的效果也是肯定的。如冬沙藏和马粪藏后春插的成活率就分别高14％和12％。以上事实说明,这一新创基本上是成功的。
“Deep ditch big ridge straight line method” is my field Nursery forest “triple” scientific research team in Populus tomentosa cuttings experiment created a kind of cutting operation method. In 1975, a total of 6358 knots of the cutting experiment for the forestry area in the forest area were obtained using the “deep furrows and straight-ridge insetting method” cuttings, achieving a total average survival rate of 69.5%. Among them, the Spring Festival now take the section is inserted, the average survival rate of 5 sections of 78%, more than the provincial poplar breeding cooperatives proposed indicators, eight sections of horse manure winter possession of the average survival rate of 70.9%; 1 meter The highest surviving rate was 75.3% in outer segment and the highest in two segments was 72.7%. The lowest survival rate of winter sand storage of qualified articles, four sections average 61.3%, eight sections average 54.8%, also reached or exceeded the past record. Flat cuttings with the general comparison, the experimental results of this year to see the effect of the new law is also affirmed. For example, the survival rate of spring insert after winter sand bank and horse manure storage were respectively 14% and 12% higher. The above facts show that this new start is basically a success.