东北地区纸浆林用主要杨树品（树）种生根能力的测定

摘要

Results in water cultured of rooting experimental of 12 poplar species of pulp forest in northeast China indicatedthat Yingchun 5# had the strongest rooting ability; after 12 d of hydroponics, rooting rate and average root length was 92.3% and 2.69 cm, respectively, where rooting rate and average root length was separately 100.0% and 5.20 cm following16 d of hydroponics.In Bailin2#, the emergence of root was even, rooting rate and average root length was 84.6% and 1.40 cm, respectively.Druing hydroponics period, there were no rooting in Xinjiang popular, 8859 -150, and 8859 -214.According to the comprehensive determination of rooting rate , germinating time of lateral root and average root length , Yingchun5#,Bailin2# , Sha ×Cao, Bailin3# and 8859 -172 showed the earlier rooting time and higher rooting rate .%对东北地区纸浆林用12种杨树品（树）种进行水培生根试验，结果表明：迎春5＃生根能力最强，水培12 d时生根率达92．3％，平均根长为2．69 cm；水培16 d时生根率达到100.0％，平均根长为5．20 cm。白林2＃生根较整齐，生根率稳定在84．6％，平均根长1．40 cm。新疆杨、8859-150、8859-214在水培试验时间内，没有生根。根据生根率、侧根萌动早晚、平均根长综合确定，迎春5＃、白林2＃、沙×草、白林3＃和8859-172五个品种生根时间早、生根率高。