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在盐城滨海湿地采集植被为互花米草(Spartina alterniflora)、海三棱藨草(Scirpus mariqueter)、芦苇(Phragmites australis)、碱蓬(Suaeda salsa)和光滩的土壤样品22个,分别测定了β-葡萄糖苷酶、脲酶和磷酸酶的活性。结果显示,植被覆盖下的土壤β-葡萄糖苷酶、脲酶和磷酸酶的活性均高于光滩土壤,且不同类型植被下土壤之间酶活性也有一定的差异。同一类植被覆盖下,不同样点间土壤酶活性也存在很大的差异。相关分析表明,β-葡萄糖苷酶和脲酶活性与有机质和全氮存在显著正相关;磷酸酶活性与有机质和有机质/磷呈显著正相关。有机质是影响酶活性的主要限制性物质,地上部生物量相对较大的植物(如互花米草)在提高有机质方面表现出巨大潜力,不仅可以增加土壤酶活性,还能促进养分循环和利用。
A total of 22 soil samples were collected from the coastal wetlands of Yancheng, including Spartina alterniflora, Scirpus mariqueter, Phragmites australis, Suaeda salsa and Guangtan, - Glucosidase, urease and phosphatase activity. The results showed that the activities of soil β-glucosidase, urease and phosphatase under the vegetation cover were higher than those of Guangtan soil, and the enzyme activities of soil under different types of vegetation were also different. Under the same vegetation coverage, soil enzyme activities also differed greatly among different sampling sites. Correlation analysis showed that the activities of β-glucosidase and urease were significantly and positively correlated with organic matter and total nitrogen. The activity of phosphatase was positively correlated with organic matter and organic matter / phosphorus. Organic matter is one of the main limiting substances that affect enzyme activity. Plants with a relatively large biomass above the ground, such as Spartina alterniflora, have shown great potential for organic matter enhancement, which not only increases soil enzyme activity but also promotes nutrient cycling and utilization .