摘要
以耕地为对照,研究了高寒农牧交错带种植老芒麦草和撂荒2种植被恢复措施对土壤有机碳和全氮含量的影响.结果表明,与耕地相比较种植老芒麦草和撂荒使0-30 cm土层土壤总有机碳含量分别增加了19.7%-22.4%和7.3%-10.6%,颗粒有机碳(0.05-2.00 mm)含量分别增加了43.0%-52.3%和28.7%-59.8%,土壤全氮含量分别增加了12.0%-20.6%和5.4%-13.7%.这一结果说明,在高寒农牧交错带通过种植老芒麦草或者撂荒植被恢复措施,对于提高土壤有机质含量和全氮含量、恢复土壤质量具有非常显著的效果.
The effects of two vegetation restoration types,including Elymus sibiricus plantation and abandonment, on the soil total organic carbon, particulate organic carbon and total nitrogen contents of culti- vated soil in the alpine agro-pastoral ecotone. It was found that comparing with farming land,total soil organic carbon contents in soils at depth 0-30 cm under Elymus sibiricus plantaion and abandonment after three years was increased by 19.7 %-22.4 %and 7.3 %-10.6 % respectively,particulate organic carbon contents by 43.0 %-52. 3 % and 28.7 %59.8 % respectively and total nitrogen contents by 12.0 %- 20.6 % and 5. 4%-13.7 % respectively. The results above mean that Elymus sibiricus plantation and abandonment are effective measures for vegetation restoration in the alpine agro-pastoral ecotone,and would be favorable to the enhancement in cultivated alpine soil quality.
出处
《甘肃农业大学学报》
CAS
CSCD
2007年第2期98-102,共5页
Journal of Gansu Agricultural University
基金
教育部科学技术研究重点项目(204140)
甘肃省教育厅项目(0502-13)资助.
关键词
高寒农牧交错带
植被恢复
土壤有机碳
土壤颗粒有机碳
土壤全氮
alpine agro-pastoral ecotone
vegetation restoration
soil organic carbon
particulate organic carbon
total nitrogen
