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首页> 外文会议>International Conference on Science and Technology for Desertification Control; 20061014-16; Beijing(CN) >Dynamics of Soil Microbial Biomass Carbon under Different Land-use in an Ecotone in Inner Mongolia Mountains of North China
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Dynamics of Soil Microbial Biomass Carbon under Different Land-use in an Ecotone in Inner Mongolia Mountains of North China

机译：华北内蒙古过渡带不同土地利用方式下土壤微生物生物量碳的动态

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摘要

The diversity of land use and incidence of wind erosion are common characteristics in Inner Mongolia Mountains of north China. It is known that land use changes soil physical,chemical and biological properties. The objective of this study was to investigate the effects of land use on soil microbial biomass carbon (SMBC). Fumigation extraction method was used for measuring SMBC. Three land use types (forest land, grass land and farmland) and three depths of soil profile (0- 10, 10 - 20 and 20 - 30 cm) were selected to monitor SMBC. The SMBC measurements were performed biweekly in farmland planted with spring oats from June to August 2005. The results showed that the mean SMBC of the 30 cm soil layer was highest in forest land with 493.8 mg kg-1, which was 2.5 times that of grassland and 5.5 times that of farmland. The SMBC of farmland under no-tillage (NT) increased with the fixed number of year practicing no-tillage. In forest land and grassland, the SMBC decreased with the soil depth. In farmland under no-tillage, the SMBC was highest in the 0-10 cm layer and lowest in of the 10-20 cm layer. However, the SMBC in farmland under plough tillage (PT) was adversely affected. Seasonal variations in SMBC concentrations were found in the farmland plot during plant growth periods. Our study suggested that land reclamation should be confined in appropriate scale and use of NT could protect the soil from biological degradation and maintain soil quality as compared with PT management.
机译：土地利用的多样性和风蚀的发生是中国北方内蒙古山区的共同特征。众所周知，土地利用会改变土壤的物理，化学和生物特性。这项研究的目的是调查土地利用对土壤微生物生物量碳（SMBC）的影响。采用熏蒸提取法测定SMBC。选择了三种土地利用类型（林地，草地和农田）和三种土壤剖面深度（0-10、10-20和20-30 cm）来监测SMBC。从2005年6月至2005年8月，每两周对种植春燕麦的农田进行SMBC测量。结果表明，30 cm土层的平均SMBC在林地中最高，为493.8 mg kg-1，是草地的2.5倍。是农田的5.5倍随着免耕年限的增加，免耕耕地的SMBC有所增加。在林地和草地中，SMBC随土壤深度而降低。在免耕的农田中，SMBC在0-10厘米层最高，在10-20厘米层最低。但是，耕作耕作（PT）下农田中的SMBC受到不利影响。在植物生长期间的农田中，发现SMBC浓度存在季节性变化。我们的研究表明，与PT管理相比，NT的使用应限制在适当的范围内，使用NT可以保护土壤免受生物降解并保持土壤质量。

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