【摘要】 在野外采样和试验分析的基础上,研究了奈曼旗几种主要土地类型(农田、杨树林地、草地、固定沙丘、半固定沙丘和流动沙丘)土壤的容重、粒级组成、有机碳和全氮含量及其储量。结果表明:这几种土地类型土壤容重、粒级组成、有机碳和全氮含量及其储量存在明显差异,但其显著程度不尽相同。这几种土地类型土壤100cm深有机碳储量依次为:农田(7701.6g·m-2)>杨树林地(3726.2g·m-2)>草地(2306.0g·m-2)>固定沙丘(1014.3g·m-2)>半固定沙丘(724.7g·m-2)>流动沙丘(613.8g·m-2),全氮储量依次为:农田(785.4g·m-2)>林地(416.3g·m-2)>草地(265.8g·m-2)>固定沙丘(111.2g·m-2)>半固定沙丘(96.2g·m-2)>流动沙丘(73.9g·m-2)。通过分析可以看出,土地类型是影响土壤有机碳和全氮含量及其垂直分布特征的主要因素。更多还原

【Abstract】 By the methods of field sampling and laboratory analysis,bulk density,soil particle distribution,soil organic carbon(SOC) and total nitrogen(TN) contents,and SOC and TN storages were measured under different land use types(farmland,poplar woodland,grassland,fixed dune,semi-fixed dune and mobile dune) in Naiman banner.Apparent differences with different significant degree were observed in the test parameters among different land types.The storage of soil organic carbon and total nitrogen to 100 cm depth decreased in the order: farmland(C: 7701.6g·m-2and N: 785.4g· m-2) > poplar woodland(3726.2g·m-2and N: 416.3g· m-2) > grassland(2306.0g·m-2and N: 265.8g·m-2) > fixed dune(1014.3g·m-2and N: 111.2g· m-2) > semi-fixed dune(724.7g·m-2and N: 96.2g·m-2) > mobile dune(613.8g·m-2and N: 73.9g ·m-2).Our results confirmed that land type is the main factor affecting SOC and TN content and their vertical distribution characteristics.更多还原