Temporal Effects of Soil Carbon and Nitrogen Content Change Caused by Plateau Zokor in Alpine Meadow
In order to determine the temporal effect of small subterranean rodents mound and edge effects on soil carbon(C)and nitrogen(N)content,in this study,the zonal sampling method was used to study the changes of organic carbon and nitrogen in 0-20 cm soil layer of alpine meadow in the north-east edge of Qinghai-Tibetan Plateau with the restoration years of plateau zokor(Eospalax baileyi)mound.The results showed that mound effect had obviously temporal effect on soil organic carbon,total nitrogen,ammonium nitrogen,nitrate nitrogen contents,C∶N and ammonium-to-nitrate ratio(ANR).Among them,the organic carbon content and C∶N of the soil in mounds returned to the level of the control area in the fourth year,the total nitrogen,nitrate nitrogen content,and ANR of 0-10 soil layer in the mouse mound returned to the level of the control area in the third year,in the 10-20 cm soil layer,the content of nitrate nitrogen and ammonium nitrogen in the mouse mound soil returned to the level of the control area in the fifth year,and the total nitrogen in the soil returned to the level of the control area in the first year.The edge effect also showed significant temporal effects on soil organic carbon,total nitrogen,ammonium nitrogen,nitrate nitrogen contents and C∶N.Among them,the ammonium nitrogen content in different soil layers of the edge zone recovered to the level of the control zone in the fourth year,in the 0-10 cm soil layer,the soil nitrate nitrogen and organic carbon content in the edge area returned to the level of the control area in the third year,and the soil total nitrogen content and C∶N returned to the level of the control zone in the fifth year,and the soil nitrate nitrogen content in the 10-20 cm soil layer in the marginal area recovered to the control area in the second year.
Alpine meadowMound effectEdge effectOrganic carbonNitrogenCarbon nitrogen ratioAmmonium-to-nitrate ratio
NETL
NSTL
万方数据
