Zhao Xue-Yong, Zhang Chun-Min, Zuo Xiao-An, Huang Gang, Huang Ying-Xin, Luo Ya-Yong, Wang Shao-Kun, Qü Hao
Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China.
Ying Yong Sheng Tai Xue Bao. 2009 Jul;20(7):1559-64.
Analyses of the changes in desertified land area, water resource availability, land use, and plant productivity in Horqin Sandy Land in recent 50 years showed that from 1950 to the late 1980s, the land desertification in Horqin Sandy Land had a rapid expansion, but reversed since then. The annual runoff of Xiliaohe River decreased consistently, and in 1999, the middle reach at Tongliao section was dried up. In recent 20 years, the water table of Xihu Lake was decreased by about 10 m, and dried up in 2001. The above-ground biomass of grasslands decreased from 520 g x m(-2) in 1937 to 197 g x m(-2) in 2005. The main cause of these results was the change of land use pattern, i. e., the overuse of water resources for re-vegetation or cropland irrigation. Water resources reduction was the major challenge to the desertification reversion in Horqin Sandy Land.
对科尔沁沙地近50年沙漠化土地面积、水资源可利用性、土地利用和植物生产力变化的分析表明，从1950年到20世纪80年代末，科尔沁沙地土地沙漠化迅速扩张，但自那时起出现逆转。西辽河年径流量持续减少，1999年，通辽段中游干涸。近20年来，西湖地下水位下降了约10米，并于2001年干涸。草原地上生物量从1937年的520克·平方米−2降至2005年的197克·平方米−2。这些结果的主要原因是土地利用模式的变化，即过度用水进行植被恢复或农田灌溉。水资源减少是科尔沁沙地沙漠化逆转面临的主要挑战。
