摘要
为了探讨不同土地利用方式对土壤酶活性的影响,以上海崇明不同年龄水杉林(16、25、35年生)、香樟林(20年生)和毁林地(曾为25年生柳杉林)为研究对象,并以附近的水稻田作为对照,分析不同土层(0~10、10~20和20~30 cm)的土壤脲酶、蔗糖酶、过氧化氢酶和碱性磷酸单酯酶活性,探讨不同土地利用方式对土壤酶活性的影响。结果表明:(1)各土壤酶活性在不同土地利用方式条件下差异均达到显著水平(P<0.05),农田向林地转化能提高土壤酶活性,促进土壤性状的改善,而毁林会使之降低。(2)不同土地利用类型中造林树种、造林年份也是影响土壤酶活性的重要因素,林龄与土壤酶活性呈显著的线性相关关系,且香樟林土壤酶活性强于水杉林,对土壤微生物学性质的改善能力最佳。(3)土壤酶活性随着土壤深度的增加而逐渐降低,具有很强的表聚性。(4)同一土地利用方式下土壤脲酶、蔗糖酶、磷酸单酯酶活性之间具有显著或极显著的相关性(P<0.05或P<0.01),而过氧化氢酶与其他酶活性的相关性相对较弱。
In order to explore the change of soil enzyme activities under different landuse patterns, Metasequoia glyptostroboides （MG） forests （16-, 25-, 35-year-old）, 20-year-old Cinnamomum camphora （CC） forest and deforested land （formerly a 25-year-old Cryptomeria fortunei forest） were investigated at Dongping National Forest Park in Chongming Island. With rice paddy field as a control, we assessed the effects of different landuse patterns on the activities of soil urease （URE）, invertase （INV）, catalase （CAT） and alkaline phosphatase （ALP） in 0-10, 10-20 and 20-30 cm soil layers. The results showed that： （1） The difference in the activities of the four enzymes under different landuse patterns was significant （P〈0.05）. Returning farmland to forests increased soil enzyme activities and improved soil properties, but deforestation had opposite effects. （2） Afforestation tree species and afforestation duration were also important factors affecting soil enzyme activities. There was a significant linear correlation between stand age and soil enzyme activities. CC had higher soil enzyme activities than MG, and improved soil microbiological properties better. （3） Soil enzyme activities decreased with the increase of soil depth. （4） There were significant or very significant correlations between INV, ALP and URE activities in the same landuse type （P〈0.05 or P〈0.01）, while CAT activity showed relatively weak correlations with other enzymes.
出处
《生态学杂志》
CAS
CSCD
北大核心
2017年第7期1949-1956,共8页
Chinese Journal of Ecology
基金
国家自然科学基金项目(31270491)
国家重点研发计划项目(2016YFD0600206)资助
关键词
造林
树种组成
土壤深度
土壤酶活性
afforestation
tree species composition
soil depth
soil enzyme activity.
