|本期目录/Table of Contents|

[1]陈倩妹 王泽西 刘 洋** 郑海峰 李洪杰 王利峰 陈亚梅 谌 贤 唐实玉.川西亚高山针叶林土壤酶及其化学计量比对模拟氮沉降的响应*[J].应用与环境生物学报,2019,25(04):1-5.
 Response of soil enzyme activities and stoichiometric ratio to simulated nitrogen deposition in subalpine coniferous forests of western Sichuan*.CLC S714.2[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):1-5.
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川西亚高山针叶林土壤酶及其化学计量比对模拟氮沉降的响应*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年04期
页码:
1-5
栏目:
出版日期:
2019-07-30

文章信息/Info

Title:
CLC S714.2
作者:
陈倩妹 王泽西 刘 洋** 郑海峰 李洪杰 王利峰 陈亚梅 谌 贤 唐实玉
长江上游森林资源保育与生态安全国家林业局重点实验室,高山森林生态系统定位研究站,四川农业大学林学院生态林业研究所, 成都 611130
Author(s):
Response of soil enzyme activities and stoichiometric ratio to simulated nitrogen deposition in subalpine coniferous forests of western Sichuan*
CHEN Qianmei, WANG Zexi, LIU Yang**, ZHENG Haifeng, LI Hongjie, WANG Lifeng, CHEN Yamei, CHEN Xian and Tang Shiyu Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Long-term Research Station of Alpine Forest Ecosystems, Institute of Ecology & Forest, Sichuan Agricultural University, Chengdu 611130, China
关键词:
模拟氮沉降 亚高山针叶林 土壤酶活性 化学计量比 碳氮磷限制
Keywords:
simulated nitrogen deposition subalpine coniferous forest soil enzyme activity stoichiometric ratio carbon nitrogen and phosphorus restriction
摘要:
大气氮沉降的明显增加,将有可能显著影响我国西部地区受氮限制的亚高山森林生态系统的物质循环。模拟氮沉降会不会改变土壤酶活性及其化学计量比并缓解该区域土壤微生物生长代谢对氮的限制?基于此,我们选择了川西亚高山60年生的四川红杉(Larix mastersiana)人工林为研究对象,通过4个水平梯度的土壤模拟氮沉降控制试验(CK:0 g·m-2·a-1、N1:2 g·m-2·a-1、N2:5 g·m-2·a-1、N3:10 g·m-2·a-1),检测7种土壤酶活性及其化学计量比。结果表明:N-乙酰葡萄糖苷酶、过氧化物酶、C:NEEA、N:PEEA对一个生长季模拟氮沉降有显著响应,特别在模拟氮沉降后期表现为中氮显著促进N-乙酰葡萄糖苷酶活性56.40%—204.78%、过氧化物酶活性42.28%—54.87%;酸性磷酸酶、β-葡萄糖苷酶、纤维二糖酶、亮氨酸酶、多酚氧化酶、C:PEEA对一个生长季施氮无显著响应,但都具有极显著月动态。相关分析和逐步回归分析表明,土壤温度和含水率是土壤酶活性及其化学计量比的决定性因子。研究区域亚高山森林土壤微生物的碳氮磷代谢对模拟氮沉降响应显著,微生物代谢呈现出一定的氮限制,模拟氮沉降中氮水平后期微生物代谢呈现出由氮限制向磷限制转化的趋势。图5表3参47
Abstract:
The increasing atmo spheric nitrogen deposition maybe significantly affect the material circulation of subalpine forest ecosystems where alpine soil are generally restricted by nitrogen in western China. The objective of this study was to examine whether simulated nitrogen deposition would change the soil enzyme activity and its stoichiometry and alleviate the nitrogen limitation of soil microbial metabolism in this region. Four gradient experiments of simulated nitrogen deposition (CK: 0 g m-2 a -1, N1:2 g m-2 a -1, N2: 5 g m-2 a -1, N3: 10 g m-2 a -1) were conducted in the 60-year-old Larix mastersiana plantation of the subalpine forest in western Sichuan, to analyze seven soil enzyme activities and stoichiometric ratio . The results indicated that N- acetylglucosidase , peroxidase, C:NEEA, N:PEEA ha d a significant response to simulated nitrogen deposition in a growing season, and medium simulated nitrogen deposition showed a significant promotion of N-acetylglucosidase 56.40%—204.78% and peroxidase 42.28%—54.87%, especially in the later growing season. Acid phosphatase, β-glucosidase, cellobiase, leucine, polyphenol oxidase , and C:PEEA didn’t show significantly response to simulated nitrogen deposition in a growing season , but all had significantly monthly variations. Correlation analysis and stepwise regression analysis showed that soil temperature and moisture content were the decisive factors of soil enzyme activi ties and stoichiometric radios. The carbon, nitrogen and phosphorus metabolism of soil microorganisms responded significantly to simulated nitrogen deposition , and the microbial metabolism showed a certain degree of nitrogen restriction in subalpine coniferous freost. The microbial metabolism showed a trend of conversion from nitrogen restriction to phosphorus restriction at the later stage of medium simulated nitrogen deposition

相似文献/References:

[1]刘义,陈劲松,尹华军,等.川西亚高山针叶林土壤硝化作用及其影响因素[J].应用与环境生物学报,2006,12(04):500.
 LIU Yi,et al..Nitrification and Impact Factors of Subalpine Coniferous Forest Soil in Western Sichuan, China[J].Chinese Journal of Applied & Environmental Biology,2006,12(04):500.

备注/Memo

备注/Memo:
*国家自然科学基金项目(31570605, 31200345)和四川省教育厅重点项目(18ZA0393)资助 Supported by the National Natural Science Foundation of China (NO. 31570605, 31200345) and Major Project of Education Department in Sichuan (NO. 18ZA0393) **收稿日期 Received: 2018-11-24 接受日期 Accepted: 2019-01-25*国家自然科学基金项目(31570605, 31200345)和四川省教育厅重点项目(18ZA0393)资助 Supported by the National Natural Science Foundation of China (NO. 31570605, 31200345) and Major Project of Education Department in Sichuan (NO. 18ZA0393) **通讯作者 Corresponding author (sicauliuyang@163.com)
更新日期/Last Update: 2019-02-01