%0 Journal Article
%T Dynamics of Carbon and Nitrogen Storages in Plant-Soil System During Desertification Process in Horqin Sandy Land<br>沙漠化过程中科尔沁沙地植物-土壤系统碳氮储量动态
%A LI Yu-qiang
%A ZHAO Ha-lin
%A YI Xiao-yong
%A ZUO Xiao-an
%A CHEN Yin-ping
%A <br>李玉强
%A 赵哈林
%A 移小勇
%A 左小安
%A 陈银萍
%J 环境科学
%D 2006
%I 
%X Organic carbon and nitrogen storages in plant-soil system were measured at different desertification stages(potential,light,moderate,severe,and most-severe) in Horqin sandy land.From potential desertification to light,moderate,severe,and most-severe desertification,total biomass(aboveground and belowground) carbon storages decrease by 26.4%,51.0%,79.0%,and 91.0%,respectively,while total biomass nitrogen storages decrease by 33.6%,66.9%,87.4%,and 93.2%,soil organic carbon storages by 52.2%,75.9%,87.0%,and 90.1%,and soil nitrogen storages by 43.5%,71.0%,81.3%,and 82.7%,respectively.The carbon and nitrogen storages in plant-soil system are in the order: potential(C:(5 266) g·m-2 and N: 534 g·m-2)>light(C:(2 619) g·m-2 and N: 303 g·m-2)>moderate(C:(1 368) g·m-2 and N: 156 g·m-2)>severe(C: 715 g·m-2 and N: 99 g·m-2)>most severe(C: 517 g·m-2 and N: 91 g·m-2).The biomass carbon and nitrogen storages decline more rapidly at later desertification stage(from severe to most-severe) than initial stage(from potential to light),while soil carbon and nitrogen decline more rapidly at initial stage.There is a greater proportional decline in soil carbon than in nitrogen during desertification process.The biomass nitrogen storages decline more rapidly than carbon at initial stage,however,the case is reverse at later stage.
%K desertification
%K plant-soil system
%K organic carbon storage
%K nitrogen storage
%K Horqin sandy land<br>沙漠化
%K 植物-土壤系统
%K 有机碳储量
%K 氮储量
%K 科尔沁沙地
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=D8253C4F955796C9&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=E158A972A605785F&sid=20C9FB8C7B4A22AD&eid=DB7B2C790D19BE6E&journal_id=0250-3301&journal_name=环境科学&referenced_num=9&reference_num=22