毛乌素沙地退牧还草对土壤性质的影响——以乌审旗为例  

The influence of grazing withdrawal project to soil property in Mu Us Sandy Land,China———exampling Wushenqi Banner

作　　者：贺威[1] 李青丰[1] 徐军[1] 李玲玲[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《草原与草业》2013年第3期54-59,共6页Grassland and Prataculture

摘　　要：对北方重要生态区草原退牧还草工程区土壤有机碳(SOC)、全氮(T N)和土壤容重的研究结果表明,退化草地经围栏禁牧和补播后,由于有效消除了放牧的干扰,草地得到了休养生息,开始不断改善和恢复。土壤表层(0-20cm)的有机碳和全氮在禁牧加补播区和放牧区没有显著差异,但都显著低于禁牧区的草地。土壤容重则表现为:相同土壤质地,放牧区高于禁牧区。综合评价显示,在该地区禁牧是较好的工程实施措施。Soil organic carbon （SOC） , total nitrogen （TN） and the change of soil bulk density under the different construction step in the important ecological sites were studied, which showed that degraded grassland started to restore and improve progressively because of eliminating grazing interference after prohibiting grazing and reseeding, mainly re- presenting in the follows. SOC and TN of surface soil （0-20cm） had no significant difference under forbidden grazing and reseeding and grazing areas, but significantly lower than the on forbidden grazing areas. The soil texture, soil bulk density in grazing areas was higher than no forbidden grazing areas. Our results indicated that forbidden grazing in the at- ea is the best construction

关 键 词：退牧还草 有机碳 全氮 容重 

分 类 号：S812.2[农业科学—草业科学]