white elm

同根派生

Cold resistance Species selected are weeping willow,spruce,white elm,Chinese tamarisk and desert date.
经抗寒性分析得出垂柳、云杉、白榆、柽柳、沙枣抗冻性较强 ;
It is suggested that these characters could be consideredd as early selection and evaluation indexes of white elm.
可以考虑用它们作为白榆早期选择与评价的指标。
Variance analysis and multiple comparison indicate that differences in all characters of white elm half-sib families and clones are significan at 0.05 level or 0.01 level except for the ratio of fresh weight to dry weight among half-sib families.
方差分析和差异显著性检验的结果表明，除鲜/干比在半同胞家系间差异没有达到显著水平外，其它性状在半同胞家系间和无性系间差异均达到了显著或极显著水平。
So we measured the white elm tussock moth, an important poplar leaf-eating pest of the Northwest region, studied the energy flows and revenue and expenditure law systematically in its whole life history.
因此，本文选定西北地区杨树主要食叶害虫杨毒蛾为试虫、系统的研究了其整个生活史过程中的能量流动和收支规律，研究结果如下：
Eighteen white elm (Ulmus pimila linn.)
本文以十年生白榆（Ulmus pimila linn.;）