白刺在山西引种试验初期的成活及生长表现

从内蒙古巴彦淖尔市磴口县引进3个白刺品种,以扦插育苗方式在山西西北部地区朔州市怀仁县引种栽培,观察白刺在山西引种试验初期的成活及生长表现,为扩大白刺引种栽培范围提供依据。试验结果表明,常规管理条件下,大白刺和唐古特白刺的成活率分别为52%~55%、49%~53%,西伯利亚白刺成活率较低,为27%~32%。唐古特白刺在成活后表现出明显生长优势,整个生长季新梢生长量、生根数及根长均为最大,生长季末分别达51.464cm、17~29条·株-1和46.310cm;其次为大白刺,西伯利亚白刺生长缓慢,生长季末新梢生长量为39.607cm,生根8~14条·株-1,根长生长量为28.490cm。从单月长势来看,7月下旬到8月下旬为白刺生长速生期,该时期各品种植株间新梢和根长生长量分异也较大。白刺在研究区营养生长潜力较好,生殖生长还需进一步观察研究。

Survival and Growing Performance of the Introduced Nitraria Species in Shanxi

In order to observe survival and growing performance of the introduced NitrariaSpecies in Shanxi and provide the basis for expanding the range of Nitrariaintroduction and cultivation,three Nitrariavarieties were introduced and cultivated by cutting propagation in Huairen county,Shuozhou city of the northwest Shanxi from Dengkou county,Bayannaoer,Inner Mongolia.The results showed that under general management conditions,the cutting survival rates of Nitraria tangutormand Nitraria roborowskii were 52%-55%,49%-53%,respectively.Nitrariasibirica cutting survival rate was lower,only 27%-32%.Nitraria tangutormhad a significant growth advantage after surviving,its new branch growth,radication number and root growth were the largest during June to September among the three,the index was 51.464 cm,17-29per plant,46.310 cm at the end of growing season,respectively;however,Nitraria sibiricagrew slowly,its index was 39.607 cm,8-14per plant,28.490 cm,respectively.The fast-growing period for Nitraria was from late in July to late in August,the difference between new branch growth and root growth of all varieties of plants was large during this period.The vegetative growth potential for Nitraria was better in the area tested,reproductive growth still needs further experimental study.