white elm

同根派生

Cold resistance Species selected are weeping willow,spruce,white elm,Chinese tamarisk and desert date.
經抗寒性分析得出垂柳、雲杉、白榆、檉柳、沙棗抗凍性較強 ;
It is suggested that these characters could be consideredd as early selection and evaluation indexes of white elm.
可以考慮用它們作爲白榆早期選擇與評價的指標。
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.
方差分析和差異顯著性檢騐的結果表明，除鮮/乾比在半同胞家系間差異沒有達到顯著水平外，其它性狀在半同胞家系間和無性系間差異均達到了顯著或極顯著水平。
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，本文選定西北地區楊樹主要食葉害蟲楊毒蛾爲試蟲、系統的研究了其整個生活史過程中的能量流動和收支槼律，研究結果如下：
Eighteen white elm (Ulmus pimila linn.)
本文以十年生白榆（Ulmus pimila linn.;）