【摘要】 以黑杨派无性系014杨、111杨、177杨、LX-6和中辽1号为试验材料,对其1年生幼苗的生长性状进行研究。结果表明:5个杨树无性系苗高与地径年生长符合"S"型生长曲线;014杨、177杨、111杨和中辽1号速生期为7月19日至8月28日,LX-6速生期则为6月29日至8月28日;各无性系平均叶面积9月27日为最大值,各无性系单株总叶面积9月7日为最大值;苗高与地径、单株总叶面积及净光合速率呈极显著或显著正相关,地径与单株总叶面积、净光合速率呈显著正相关。更多还原

【Abstract】 Growth characteristics were studied of one-year-old seedling of P.xcanadens is ’014’,P.×c anode nsis’ Bellotto’,P.×canadensis ’177’,LX-6 and P.×canadensis cl’ zhongliaol ’.The results showed that:The growth rules of seedling height and ground diameter in five clones accord w ith "S" curve;The fast-grow th period of P.×canadensis cl’zhongliaor,P.×canadensis ’Bellotto’,P.xcanadens is ’177’ andP.×canodensis ’014’ were about July 19 to A ugust 28.The LX-6 fast-grow th period was about June 29 to A ugust28;The maximum of average leaf area among five clones were on Septem ber 27;The maximum of single plant total leaf area among five clones were on Septem ber 7;Seedling height had extrem ely significantly or significantly positive correlation w ith ground diam eter,total leaf area and P_n· ground diam eter had significantly positive correlation w ith total leaf area and P_n.更多还原