Li Yu-qiang, Zhao Ha-lin, Yi Xiao-yong, Zuo Xiao-an, Chen Yin-ping
Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China.
Huan Jing Ke Xue. 2006 Apr;27(4):635-40.
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 x m(-2) and N: 534 g m(-2)) >light (C: 2619 g x m(-2) and N: 303 g x m(-2)) >moderate (C: 1368 g x m(-2) and N: 156 g x m(-2)) >severe (C: 715 g x m(-2) and N: 99 g x m(-2))>most severe (C: 517 g x x m(-2) and N: 91 g x 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.
在科尔沁沙地不同沙漠化阶段（潜在、轻度、中度、重度和极重度）对植物 - 土壤系统中的有机碳和氮储量进行了测定。从潜在沙漠化到轻度、中度、重度和极重度沙漠化，总生物量（地上和地下）碳储量分别减少了26.4%、51.0%、79.0%和91.0%，而总生物量氮储量分别减少了33.6%、66.9%、87.4%和93.2%，土壤有机碳储量分别减少了52.2%、75.9%、87.0%和90.1%，土壤氮储量分别减少了43.5%、71.0%、81.3%和82.7%。植物 - 土壤系统中的碳和氮储量顺序为：潜在（碳：5266 g·m⁻²，氮：534 g·m⁻²）＞轻度（碳：2619 g·m⁻²，氮：303 g·m⁻²）＞中度（碳：1368 g·m⁻²，氮：156 g·m⁻²）＞重度（碳：715 g·m⁻²，氮：99 g·m⁻²）＞极重度（碳：517 g·m⁻²，氮：91 g·m⁻²）。生物量碳和氮储量在沙漠化后期阶段（从重度到极重度）比初期阶段（从潜在到轻度）下降得更快，而土壤碳和氮在初期阶段下降得更快。在沙漠化过程中，土壤碳的比例下降幅度大于氮。生物量氮储量在初期阶段比碳下降得更快，然而，在后期阶段情况相反。
