干旱荒漠区围栏封育对白刺群落生长的影响

Influence of Fencing Closure on Growth of Nitraria angutorum Community in Arid Desert Region

通过对石羊河下游干旱荒漠区半固定沙地中白刺群落开展围栏封育试验,结果表明:半固定沙地白刺群落围栏封育3年后,白刺群落中植物种类数与对照区相比灌木种类增加了2种,草本种类增加了6种;群落总盖度比对照区增加了126.7%,且第3年灌木盖度比草本盖度增加幅度较大;灌木高生长和冠幅生长分别比对照区增加了68.7%和62.6%。实施围栏封育后,有利于白刺群落中植物种类的增加和群落的生长及退化种群的恢复。

Based on fencing closure experiment of Nitraria angutorum in semi-fixed sandy land of arid desert region in the lower reaches of Shiyanghe River,the results showed： after three years of fencing closure of Nitraria angutorum community in semi-fixed sandy land,compared with species number of plants in Nitraria angutorum community and that in control area,2 species of shrubs increased,6 species herb increased,total coverage of community increased 126.7% more than that in control area,and in the third year,shrubs coverage increased more than herb coverage;growth of shrubs height and crown width increased respectively 68.7% and 62.6% more than that in control area.Implementation of fencing closure was beneficial to the increase of plant species of Nitraria angutorum community and growth of community and recovery of degradation population.