秸秆生物质炭对镉污染水稻土根际酶活性的影响

发布时间：2018-03-02 13:09

本文选题：生物质炭　切入点：水稻　出处：《农业环境科学学报》2016年08期 　论文类型：期刊论文

【摘要】：为了探究不同Cd污染程度下生物质炭输入对水稻根际土氧化还原类酶、碳循环酶的活性变化的影响,选取水稻作为研究对象,测定不同生物质炭量及Cd施入下水稻根际及非根际土壤酶活性的变化状况。研究表明,不同处理下,水稻根际土壤碳循环酶的综合活性指数值介于1.388~12.029之间,而非根际土壤碳循环酶的活性指数值介于0.542~1.713之间。水稻根际土壤氧化还原类酶的综合活性指数值介于0.387~1.627之间,而非根际土壤氧化还原酶指数值介于0.167~1.201之间。可见水稻根际碳循环类酶及氧化还原类酶的活性均高于非根际土壤。当生物质炭施入量为10%,Cd的含量为2.5 mg·kg~(-1)时,水稻根际土壤的碳循环类酶活性指数为12.029,氧化还原类酶活性指数为1.192,均达到最大。由此可得,该浓度的生物质炭施入对两大类酶活性值的提升均有显著作用。
[Abstract]:In order to investigate the effect of biomass carbon input on the redox enzyme and carbon cycle enzyme activity in rice rhizosphere under different CD pollution levels, rice was selected as the research object. The changes of enzyme activity in rice rhizosphere and non-rhizosphere soil under different biomass carbon content and CD application were measured. The results showed that the comprehensive activity index of carbon cycling enzyme in rice rhizosphere soil was between 1.388 and 12.029 under different treatments. However, the activity index of carbon cycle enzymes in non-rhizosphere soil was between 0.542n 1.713 and the comprehensive activity index of redox enzymes in rice rhizosphere soil was between 0.387 and 1.627, while the total activity index of redox enzymes in rice rhizosphere soil was between 0.387 and 1.627. The redox enzyme index of non-rhizosphere soil was between 0.167 and 1.201. It can be seen that the activities of carbon cycle enzymes and redox enzymes in rice rhizosphere were higher than those in non-rhizosphere soil. When the biomass carbon application rate was 10 mg 路kg ~ (-1), the content of CD was 2.5 mg 路kg ~ (-1). The carbon cycle enzyme activity index and redox enzyme activity index of rice rhizosphere soil were 12.029 and 1.1922, respectively.
【作者单位】：云南农业大学资源与环境学院;
【基金】：云南省应用基础研究计划项目(2013FB043) 国家自然科学基金项目(41301349)
【分类号】：S154.2;X53

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