摘要
对艾比湖湿地典型芦苇和柽柳群落土壤过氧化氢酶、磷酸酶和脲酶及其影响因素进行了分析.结果表明:在植物不同的生长期,土壤酶活性具有明显的季节变化特征,芦苇群落土壤过氧化氢酶、磷酸酶和脲酶峰值均出现在生长旺盛期(3.26、0.60、0.33 mg·g^(-1)),谷值出现在萌芽期和展叶期,而柽柳群落的峰值出现在枯黄期(6.33、0.58、0.21 mg·g^(-1)),谷值出现在开花期和生长旺盛期;脲酶在不同生长期较为稳定,是湿地土壤酶活性差异的指示指标;芦苇和柽柳群落不同生长期土壤酶活性与土壤有机质和全磷含量呈显著正相关,而与土壤含水量的相关性不显著;芦苇群落迅速生长期土壤酶活性与土壤铵态氮呈显著正相关;两种植物群落土壤盐分与酶活性的相关性不显著.芦苇和柽柳群落不同生长期土壤酶活性受多因素的共同影响,土壤有机质和水热因子是影响艾比湖高盐湖泊湿地土壤酶活性的主导因子.
In this study, the soil catalase, phosphatase and urease activities of typical plant communities of reed （Phragmites australis） and tamarisk （Tamarix ramosissima） and their influencing factors were investigated in Ebinur Lake wetland. The results showed that three soil enzyme activi- ties of reed and tamarisk had seasonal dynamic characteristics during different growth periods. For the reed community, the peak concentrations of soil catalase, phosphatase and urease appeared at vigorous stage with 3.26, 0.60 and 0.33 mg· g^-1, respectively, and the minimum value occurred at budding stage and leaf-expansion stage. For the tamarisk community, the peak values of three soil enzyme activities appeared at withered stage with values of 6.33, 0.58 and 0.21 mg ·g^-1, respectively, and the valley values were observed at flowering and vigorous stages. Urease was stable during different growth periods, and it could be used as an indicator to identify the differences of soil enzyme activities in the wetlands. The enzyme activities of reed and tamarisk had significant positive correlation with soil organic matter and total P in all growth periods, while there was no significant relationship between enzyme activities and soil water content. The enzyme activities of reed had sig- nificant positive correlation with ammonium nitrogen in the rapid growth period. There were no significant relationships between enzyme activities and soil salinity in both communities. The soil enzyme activities of reed and tamarisk were controlled by many factors. Soil organic matter, soil water and soil temperature were the main factors influencing the enzyme activities in the Ebinur Lake wetland.
出处
《应用生态学报》
CAS
CSCD
北大核心
2017年第4期1145-1154,共10页
Chinese Journal of Applied Ecology
基金
新疆维吾尔自治区重点实验室开放课题项目(2015KL015)
国家自然科学基金项目(41561104)
新疆师范大学地理学博士点支撑学科开放课题项目(XJNU-DL-201617)
天山学者项目资助~~
关键词
芦苇
柽柳
土壤酶
生长期
Phragmites australis
Tamarix ramosissima
soil enzyme
growth period
