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根据苏柳１７２，１９４无性系在江苏洪泽、泗洪，山东泰安、平阴，浙江富阳等地５～１１年生试验林调查材料，对两无性系的生长规律、径阶结构、干形变化和材积方程的选用以及林分成熟进行了研究。结果表明，两无性系均具有明显的早期速生特性，７年生的相对直径分布范围分别是０．５３２～１．２１６和０．５８４～１．３６２；平均ｆ０．１为０．４４３和０．４４４；用作中小径级矿柱林的采伐年龄应在６～１０年。
According to the investigation data of the Suliu 172,194 clones from 5 to 11 years old experimental forests in Hongze, Sihong, Shandong Taian, Pingyin, Fuyang, Zhejiang and other places, the growth pattern, diameter structure and dry deformation of two clones And the selection of volume equation and the maturity of the tree were studied. The results showed that both clones had obvious early fast-growing characteristics, and the relative diameter distribution range of 7-year-old was 0.532-1.216 and 0.584-1.362, respectively; the average f0.1 was 0.443 and 0. 444; logging age should be 6 to 10 years for the middle and small diameter pillar pillars.