西宁曹家堡机场飞行区植被分布与土壤可溶性盐分特征的关系研究

Study on the relation of regetation distribution and soil soluble saline in flight area at Xining Caojiabao airport

通过对西宁曹家堡机场飞行区随机分区采集的土壤进行可溶性盐分测定,查明在经过严重人为扰动后飞行区土壤可溶性盐分特征。结果表明,有植被覆盖地和裸露地土壤可溶性盐分特征相比,除了碳酸根离子、重碳酸根离子和钙离子外,其它阴阳离子的含量,后者均明显大于前者;变异分析显示,该机场飞行区土壤的可溶性盐分总体呈现出较大的差异性,除了碳酸根离子为弱变异水平外,其它离子均为中等以上变异,而钠离子和氯离子表现为强变异水平,镁离子接近强变异水平;土壤盐分组成中,阴离子以C l-为主,钠型和镁型盐氯化物占优势,也是导致飞行区植被呈斑块分布的主要原因。

The soil soluble salines of the flight area of Xining Caojiabao airport were studied. The results indicated that the soil soluble saline except CO3^2- ,HCO3^- and Ca^2＋ in bared soil were significantly lower than those in vegetation part. Variance analysis showed that the CO3^2- of soil had low variance, the Na^＋ and Mg^2＋ had high variance, while the other soil properties had medium variance. The predominant anion from the salt in the soil is Cl^- ,the dominant soluble salt is MgCl2 and NaCl,it is the main reason of leading to barren land.