生态环境学报Issue(9)：1538-1543,6.
土默川平原不同盐渍化土壤酶活性特征的研究
Enzymatic sctivity of different salt affected soils in Tumochuan plain
摘要
Abstract
In order to understand the seasonal dynamics of soil enzyme activities in different salt affected in Tumochuan plain, we collected light, moderate and high salt affected soil and measured the activities of invertase, catalase, urease and alkaline phosphatase at 0-40 cm soil layer in different seasons. The results showed that soil invertase、catalase、urease and alkaline phosphatase activities decreased with the increase of total salt content. The content of invertase, catalase, urease and alkaline phosphatase ranged from 0.65 to 36.55 mg·g-1, from 2.76 to 3.35 mL·g-1, from 0.003 to 0.018 mg·g-1 and from 0.10 to 0.98 mg·g-1, respectively. Soil invertase, urease and alkaline phosphatase activities decreased with a increase of soil depth. Catalase activity in 20−40 cm soil layer is much higher than 0−20 cm soil layer. There is a different seasonal variation trend in soil enzyme activity with different degree of salinization. The seasonal variation of catalase and sucrase activities were observed significantly increased and then decreased. The seasonal variation of urease and alkaline phosphatase activity increased at first, decreased subsequently and decreased finally. Alkaline phosphatase enzyme activity increased gradually with the advance of time. The maximum value of sucrase and urease appeared in August while catalase and alkaline phosphatase was in July and September, respectively. The ranking of soil enzyme activities is characterized by light>moderate>high salt affected soil. Alkaline phosphatase significantly correlated to urease and invertase, whereas negatively correlated to catalase. A significantly positive correlation is observed between invertase and urease. In conclusion, soil enzyme activities have a significant different in different salt affected soil and seasons. Soil salt content affected enzymatic activity of soil in this area.关键词
土壤酶活性/季节动态/盐渍化土壤/土默川平原Key words
soil enzymatic activity/seasonal dynamics/salt affected soil/Tumochuan plain分类
农业科技引用本文复制引用
景宇鹏,李跃进,年佳乐,蔺亚莉..土默川平原不同盐渍化土壤酶活性特征的研究[J].生态环境学报,2013,(9):1538-1543,6.基金项目
国家自然科学基金项目 （）
