摘要
以三峡库区2类典型的森林类型马尾松纯林和马尾松-杉木混交林为研究对象,测定土壤理化性质与不同季节酶活性,以揭示土壤酶的季节动态及其与养分的关系。结果表明:5种酶活性最低值均出现在冬季(1月),除多酚氧化酶活性最高值出现在夏季(7月)外,其余4种酶活性最高值出现在秋季(10月)。蔗糖酶、脲酶和过氧化氢酶活性的季节变化规律一致,从夏季到冬季呈现先升高后降低再升高的变化趋势,多酚氧化酶、过氧化氢酶和纤维素酶的季节变化则呈现从春季到秋季持续升高再降低的动态规律。除多酚氧化酶外,其余4种酶活性均与土壤有机质、全氮、土壤含水量、硝态氮呈极显著正相关,4种酶之间均存在显著的正相关关系。
To reveal the seasonal dynamics of enzymes activities and the relationship with nutrients, the soil physical and chemical properties, enzymes activities for different seasons of the masson pine pure forests and Chinese fir mixed forests in the Three Gorges Reservoir Area were studied. The results showed that the minimum activitiy values of invertase, urease, polyphenol oxidase, catalase and cellulose were both found in winter, and the maximum were found in autumn except for polyphenol oxidase in summer. The same trend of seasonal variation of enzymes activities was found between invertase, ure ase and catalase, and it showed that the enzymes activities increased then decreased and then increased a- gain from the summer to spring. Except polyphenol oxidase, the activities of other four enzymes had a significant positive correlation with soil organic matter, total nitrogen, soil water content, nitrate nitrogen. Significant positive correlations were found between the four enzyme activities.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2014年第4期39-44,共6页
Journal of Huazhong Agricultural University
基金
国家科技支撑计划项目(2011BADA38D04)
林业公益性行业科研专项(201104008)
关键词
三峡库区
马尾松林
土壤酶
土壤养分
季节动态
Three Gorges Reservoir Area
masson pine forest
soil enzymes
soil nutrienst
seasonal dynamics
