困难立地条件下梭梭苗木造林效果研究

Adaptability of Haloxylon ammodendron Seedlings Under Difficult Site Condition

通过实地样方调查,对民勤不同困难立地条件人工栽植梭梭成活率进行了调查,以研究困难立地梭梭苗木的适应性。结果表明:不同立地条件下苗木生长状况差异显著,8月不同立地梭梭成活率依次为砾石戈壁(样地类型Ⅲ)>沙漠(样地类型Ⅳ)>低山丘陵(样地类型Ⅱ)>盐碱沙滩地(样地类型Ⅰ)。各立地类型区,6月和8月苗木成活率差异显著,沙漠区(样地类型Ⅳ)6月成活率85%,8月成活率50%,两者相差35个百分点;砾石戈壁(样地类型Ⅲ)6月成活率80%,8月成活率60%,两者相差20个百分点;盐碱沙滩地区(样地类型Ⅰ)6月成活率50%,8月成活率10%,两者相差40个百分点。

The survival rate of Haloxylon ammodendronin different difficult site conditions was investigated by field sampling survey to study the adaptability of Haloxylon ammodendron seedlings in difficult site.Result shows that there are significant differences in the growth status of seedlings under different site conditions.The survival rates of Haloxylon ammodendronin different sites in August is gravel gobi（sample plotⅢ） desert（sample plotⅣ）hilly mountains（sample plotⅡ）saline-alkali sandyland（sample plotⅠ）.The survival rate of seedlings is 85%in June and 50%in August in the desert area（sample plotⅣ）,and the difference of both is 35%;the survival rate of gravel Gobi（sample plotⅢ）is 80%in June,60%in August,the difference of both is 20%;in saline-alkali sandy beach area（sample plotⅠ）,the survival rate of June is 50% and the survival rate of August is 10%;the difference of both is 40%.