@article{刘增文:27, author = {[刘增文, 李雅素]}, title = {黄土丘陵区柠条林地养分状况及其循环规律}, publisher = {生态学杂志}, year = {1997}, journal = {生态学杂志}, volume = {}, number = {6}, eid = {27}, pages = {27-29,51}, keywords = {}, url = http://www.cje.net.cn/CN/abstract/article_19031.shtml }