模拟氮沉降对华西雨屏区天然常绿阔叶林土壤微生物生物量碳和氮的影响

doi:10.13287/j.1001-9332.201701.014

应用生态学报 ›› 2017, Vol. 28 ›› Issue (1): 12-18.doi: 10.13287/j.1001-9332.201701.014

模拟氮沉降对华西雨屏区天然常绿阔叶林土壤微生物生物量碳和氮的影响

周世兴¹, 邹秤², 肖永翔¹, 向元彬¹, 韩博涵¹, 唐剑东¹, 罗超¹, 黄从德^1*

¹四川农业大学林学院, 成都 611130
²四川农业大学风景园林学院, 成都 611130

收稿日期:2016-05-03 修回日期:2016-10-21 发布日期:2017-01-18
通讯作者: *E-mail:lyyxq100@aliyun.com
作者简介:周世兴,男,1990年生,博士研究生.主要从事森林碳循环和森林资源调查理论与技术研究.E-mail:djyzsx@163.com
基金资助:
本文由国家科技支撑计划项目(2010BACO1A11)和四川省农作物育种攻关项目(2011NZ0098-10)资助

Effects of simulated nitrogen deposition on soil microbial biomass carbon and nitrogen in natural evergreen broad-leaved forest in the Rainy Area of West China

ZHOU Shi-xing¹, ZOU Cheng², XIAO Yong-xiang¹, XIANG Yuan-bin¹, HAN Bo-han¹, TANG Jian-dong¹, LUO Chao¹, HUANG Cong-de^1*

¹College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
²College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China

Received:2016-05-03 Revised:2016-10-21 Published:2017-01-18
Contact: *E-mail:lyyxq100@aliyun.com
Supported by:
This work was supported by the National Science & Technology Support Plan of China (2010BACO1A11) and the Crop Breeding Research Project of Sichuan Province (2011NZ0098-10)

摘要/Abstract

摘要： 为理解模拟氮沉降对华西雨屏区天然常绿阔叶林土壤微生物生物量碳(MBC)和氮(MBN)的影响,通过一年野外模拟氮(NH₄NO₃)沉降试验,氮沉降水平分别为对照(CK, 0 g N·m^-2·a^-1)、低氮沉降(L, 5 g N·m^-2·a^-1)、中氮沉降(M, 15 g N·m^-2·a^-1)和高氮沉降(H, 30 g N·m^-2·a^-1),研究了氮沉降对天然常绿阔叶林土壤MBC和MBN的影响.结果表明: 氮沉降显著降低了0～10 cm土层MBC和MBN,且随氮沉降量的增加,下降幅度增大;L和M处理对10～20 cm土层MBC和MBN无显著影响,H处理显著降低了10～20 cm土层土壤MBC和MBN;氮沉降对MBC和MBN的影响随土壤深度的增加而减弱.MBC和MBN具有明显的季节变化,在0～10和10～20 cm土层均表现为秋季最高,夏季最低.0～10和10～20 cm土层土壤微生物生物量C/N分别介于10.58～11.19和9.62～12.20,表明在华西雨屏区天然常绿阔叶林土壤微生物群落中真菌占据优势.

Abstract: To understand the effects of increasing nitrogen deposition on soil microbial biomass carbon (MBC) and nitrogen(MBN), an in situ experiment was conducted in a natural evergreen broad-leaved forest in Ya’an City, Sichuan Province. Four levels of nitrogen deposition were set: i.e., control (CK, 0 g N·m^-2·a^-1), low nitrogen (L, 5 g N·m^-2·a^-1), medium nitrogen (M, 15 g N·m^-2·a^-1), and high nitrogen (H, 30 g N·m^-2·a^-1). The results indicated that nitrogen deposition significantly decreased MBC and MBN in the 0-10 cm soil layer, and as N de-position increased, the inhibition effect was enhanced. L and M treatments had no significant effect on MBC and MBN in the 10-20 cm soil layer, while H treatment significantly reduced. The influence of N deposition on MBC and MBN was weakened with the increase of soil depth. MBC and MBN had obvious seasonal dynamic, which were highest in autumn and lowest in summer both in the 0-10 and 10-20 cm soil layers. The fluctuation ranges of soil microbial biomass C/N were respectively 10.58-11.19 and 9.62-12.20 in the 0-10 cm and 10-20 cm soil layers, which indicated that the fungi hold advantage in the soil microbial community in this natural evergreen broad-leaved forest.

周世兴, 邹秤, 肖永翔, 向元彬, 韩博涵, 唐剑东, 罗超, 黄从德. 模拟氮沉降对华西雨屏区天然常绿阔叶林土壤微生物生物量碳和氮的影响[J]. 应用生态学报, 2017, 28(1): 12-18.

ZHOU Shi-xing, ZOU Cheng, XIAO Yong-xiang, XIANG Yuan-bin, HAN Bo-han, TANG Jian-dong, LUO Chao, HUANG Cong-de. Effects of simulated nitrogen deposition on soil microbial biomass carbon and nitrogen in natural evergreen broad-leaved forest in the Rainy Area of West China[J]. Chinese Journal of Applied Ecology, 2017, 28(1): 12-18.

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模拟氮沉降对华西雨屏区天然常绿阔叶林土壤微生物生物量碳和氮的影响

Effects of simulated nitrogen deposition on soil microbial biomass carbon and nitrogen in natural evergreen broad-leaved forest in the Rainy Area of West China

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