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1961年春,领导告诉我们,沙荒造林中杨树生长衰退的问题,是一个重要的问题,要求我们研究解决。我们接受了这项任务后,选择了河南予东睢杞林场为试验基点,进行蹲点研究。睢杞林场是黄河泛滥固道,有大片平原沙地冲积土壤,适于造林。但因为土壤肥力不足,几年来所栽的杨树长不高,成为“小老树”。通过1963—1965年3年的试验,我们用种绿肥的办法,增加土壤肥力,对杨树生长收到一些效果,河南省林业厅领导对这个问题很重视,睢杞林场全场职工对这项试验也很满意,给予大力支持。他们说:“就是要科学试验,绿肥真顶事”。外单位也都来参观,一致认
In the spring of 1961, the leaders told us that the problem of the decline of poplar growth in sandy desertification is an important issue that requires us to study and solve it. After we accepted this task, we chose Henan Yuzhangqi Forest Farm as a test base for the study of stay-at-home. Qiongqi forest is rampant the Yellow River, there are large areas of alluvial plain sandy soils, suitable for afforestation. However, due to lack of soil fertility, poplar planted in recent years grow up to become “little old tree.” Through the three-year experiment of 1963-1965, we used the method of green manure to increase soil fertility and received some effects on poplar growth. The head of Henan Provincial Forestry Department attached great importance to this issue. Test is also very satisfied, give strong support. They said: “It is to science experiments, green manure top thing.” Foreign units have come to visit, agreed