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通过测定甘肃河西走廊疏勒河中游昌马冲积扇缘不同镁碱度条件下10个采样点30个土样的化学性质和生物化学性质指标,研究了电导率和镁碱度对土壤微生物生物量及其基础呼吸的影响。结果表明:微生物生物量碳(氮)和土壤基础呼吸与电导率、镁碱度和Mg2+/Ca2+之间显著负相关,表明盐度和镁碱度对土壤微生物群落有显著的抑制作用,而且盐度的抑制作用比镁碱度更大;微生物代谢熵(qCO2)和电导率、镁碱度、Mg2+/Ca2+之间为正相关关系,也说明镁碱化盐土对土壤微生物而言是一种严重的胁迫环境。
By measuring the chemical and biochemical properties of 30 samples at 10 sampling sites under different magnesia-alkaline conditions in the middle Changjiang River basin of the Shule River in Gansu Hexi Corridor, the effects of conductivity and magnesium alkalinity on soil microbial biomass And its underlying respiratory effects. The results showed that there was a significant negative correlation between soil microbial biomass carbon respiration and conductivity, magnesium alkalinity and Mg2 + / Ca2 +, indicating that salinity and magnesium alkalinity had a significant inhibitory effect on soil microbial community, Degree of inhibition than magnesium alkalinity; microbial metabolic entropy (qCO2) and conductivity, magnesium alkalinity, Mg2 + / Ca2 + is a positive correlation between, also shows that magnesium alkalinity saline soil is a kind of serious The stress environment.