In this study,by measuring stable carbon isotopes in leaves of 51 alpine plant species belonged to 19 families and 41 genera growing in the east of Tibetan Plateau in 2002 and 2003,we studied the variations of δ13C values between two year.

Four long-term agricultural field experiments combined with an laboratory incubation experiment were conducted to evaluate the effect of organic,inorganic and organic+inorganic fertilizer application on δ13C value of soil organic matter(SOM)and humic acid(HA)in black soil,brown soil,meadow soil and paddy soil.

The foliar δ13C values were used to denote the long-term water use efficiency(WUE)of plants whereas long-term nitrogen use efficiency(NUE)was estimated by the ratio of C to N.

An investigation into the causes of the azimuth variations of δ~(13)C in Cryptomeria fortunei tree rings at Tianmu Mountain;

Relationship between the stable carbon and oxygen isotopic compositions of tree ring in the Mt. Helan region,Northwestern China;

Information of low cloud amount recorded in δ~(13)C series of tree ring cellulose of Pinus Koraiensis in Antu Area;

The climatic reconstruction from the tree-ring δ~(13)C values of Cedrus deodara (Roxb.) Loud. during the past 20 years in Nanjing;

Characteristics of millennial tree-ring width variations of Qilian juniper in Shalike Mountain, Qinghai;

The principle and current situation of application of studying methods of stable carbon isotope in tree-ring to extracting information for environmental and climatic changes are summeried systematically and profoundly in this paper,and then the tendency of the application of the method are drawn from study cases.