沙柳优良品系选育的研究

对鄂尔多斯不同地区沙柳的表现型进行调查,并对7个不同地区的沙柳进行选育,对表现型优良的6个品系做耐盐性研究,结果表明:鄂尔多斯市不同地区沙柳的表现型存在较大差异,以台格庙地区沙柳的表现型最好,平均丛枝数和丛高分别达162枝和4.19 m,平均冠幅为5.15 m,与其他地区相比在p=0.05水平下差异显著；图克和查干尔淖地区沙柳表现型相对较差；选育后阿门其和台格庙两个地区沙柳生长性状相对较好,无性系繁殖苗成活率均达到90%以上,丛高和地径均高于其他地区无性系繁殖苗；查干尔淖地区无性系沙柳繁殖苗长势最差；筛选的6个沙柳品系均能在中度盐碱滩上生长,利用隶属函数分析法综合评价了6个沙柳品系的抗逆性强弱,筛选出了沙柳两个抗逆性优良品系,即Ⅲ-01和Ⅷ-02。这两个品系表现型优良,抗逆性强,适于在西北干旱、盐碱地上推广栽植。

Study on Good Family Breeding of Salix Psammophila

Survey on the phenotypes of Salix Psammophila of 7 different areas in Ordos and study on good family breeding of Salix Psammophila were conducted. Six good families have been screened to be tested their salt tolerance. Result indicated that the phenotypes are significantly different in study area. The phenotype is best in Taigemiao area, average branching number and height can come to 4.19 m and 162 separately. Average grow-width is 5.15 m, relationa to others are significant at p=0.05. The phenotypes in Tuke and Chahannao are relatively inferior. Salix psammophila after breeding grow better in Amenqi and Taigemiao, the survive rate of clone seeding can come to 90%; the grow-width and ground diameter are better than clone seeding in other regions. Seeding grow worst in Chahannao area. The screened 6 good phenotype strains all can grow well in middle saline-alkali soil, in which two good strains have high tolerance after comprehensive evaluation with Membership Function. The two strains have been identified as good salt tolerance strains that suitable for popularizing in Northwest China.