Key;
Laboratory;
of;
Soil;
Erosion;
and;
Dryland;
Farming;
on;
the;
Loess;
Plateau;
Institute;
of;
Soil;
and;
Water;
Conservation;
Northwest;
A&F;
University;
Yangling;
712100;
P.R.;
China;
of;
Soil;
and;
Water;
Conservation;
Chinese;
Academy;
of;
Scienees;
and;
Ministry;
of;
Water;
Resource;
Yangling;
712100;
P.R.;
China;
土壤微生物量氮; 黄土高原; 自然恢复; 群落组成; 中国; 土壤微生物生物量碳; 磷脂脂肪酸; 革兰氏阳性细菌;