水淹胁迫下新型氧肥对土壤脲酶活性的影响.PDF

第33 卷 第4 期 中 南 林 业 科 技 大 学 学 报 Vol. 33 No. 4 2013 年4 月 Journal of Central South University of Forestry Technology Apr. 2013 水淹胁迫下新型氧肥对土壤脲酶活性的影响 a a,b a a 杜琳倩 ，何 钢 ，王 静 ，王 蕾 ( 中南林业科技大学a. 生命科学与技术学院；b. 生物环境科学与技术研究所，湖南长沙4 10004) 摘 要：通过模拟实验，研究了水淹胁迫下不同浓度的新型氧肥对土壤脲酶活性的影响。结果表明，新型氧肥 可显著增强水淹胁迫下的土壤脲酶活性，氧肥浓度和土壤脲酶活性的关系达到显著正相关，并得到施加的最适 新型氧肥浓度为5g/kg ；随着新型氧肥作用时间延长，土壤脲酶活性增加的幅度先增大后减小；随着新型氧肥浓 度的增大，新型氧肥影响脲酶的定浓抑制率绝对值增大，而脲酶的变浓变化率则差别不大。该试验确定了水淹 胁迫下新型氧肥对土壤脲酶活性有明显的激活作用，并确定了最适新型氧肥浓度，为今后应用于洪涝灾害的植 物提供了科学依据。 关键词：新型氧肥；土壤脲酶；土壤脲酶活性；水淹胁迫 中图分类号：S714 ；Q55 文献标志码：A 文章编号：1673-923X(2013)04-0066-04 Effect of new oxygen fertilizer on soil urease activity in waterlogging stress a a,b a a DU Lin-qian , HE Gang , WANG Jing , WANG Lei (a. School of Life Science Technology; b. Institute of Biological Environmental Science Technology, Central South University of Forestry and Technology, Changsha 410004, Hunan, China) Abstract: By simulation methods，in the case of waterlogging stress the effects of different concentrations of new oxygen fertilizer on soil urease activity were investigated.The results are as follows: new oxygen fertilizer could remarkably increase the urease activity so that they had significant positive correlation and the most suitable concentration of oxygen fertilizer was 5g/kg; With prolonging reaction time，the increasing degree of urease activity first increased and then decreased; With the increase of concentration of new