期刊论文

Effects of doubled concentration of CO_2 on soil hydrolase activities related to turnover of soil C and N in a rice-cropping system

Li, K.

中文

中国环境科学

1000-6923

2018

38

9

3474-3480

10.19674/j.cnki.issn1000-6923.2018.0376

国家自然科学基金资助项目（41501321）； 湖南省自然科学基金资助项目（2016JJ3132）； 政府间国际科技创新合作重点专项（S2016G0053）；

本校为第一且通讯机构

为了探究CO_2倍增对土壤微生物生物量和酶活性的影响,选择亚热带区多年种植水稻的典型红壤为研究对象,对不同水稻生育期下土壤微生物生物量碳氮及其土壤碳氮转化关键酶活性:β-葡糖苷酶(β-Glu)、木聚糖酶(Xyl)和几丁质酶(N-Ac)进行了研究.结果表明:相比于常规CO_2浓度(400×10~(-6)),CO_2倍增(800×10~(-6))促进了水稻生物量及土壤微生物生物量碳氮含量,且土壤微生物生物量碳氮受水稻生育期显著影响(P N-Ac > Xyl.多变量方差分析表明,CO_2浓度和生育期显著影响了水稻植株生物量、土壤微生物生物量碳氮和酶活性,且土壤微生物生物量碳(SMBC)和酶活性对CO_2浓度和生育期的交互作用产生了显著的响应...

To reveal effects of the elevated CO 2 concentration on soil microbial biomass and enzyme activity, typical paddy soil was selected from a subtropical area with a long history of rice cultivation. We studied the contents of soil microbial biomass carbon and nitrogen, and enzymes activity related to soil organic matter degradation (including β-glucoside, xylanase and chitinase) under different rice growth period. The results showed that: the plant biomass and soil microbial biomass were increased by the elevated CO 2 concentration (800×10 -6 )...