Response of Soil Respiration and Microbial Biomass to Soil Salinity under Different Water Content in the Coastal Areas of Eastern China
Response of Soil Respiration and Microbial Biomass to Soil Salinity under Different Water Content in the Coastal Areas of Eastern China
复制标题
中国东部沿海地区不同含水量下土壤呼吸和微生物量对土壤盐分的响应
DOI：
10.1134/s1064229320010159
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发表时间：
2020-01
影响因子：
1.4
通讯作者：
Xiaoyin Liu
中科院分区：
文献类型：
--
作者：
Kechun Wang;Junzeng Xu;Yawei Li;Haiyu Wang;Qi Wei;Linxian Liao;Xiaoyin Liu
土壤碳转化对土壤水分和盐分的响应是盐渍土改良和利用的基础。三种湿度水平的孵化实验（50、75和100%的田间容量）和6个盐度水平（土壤电导率为1：S1、S2、S3、S4的土壤悬浮液浓度分别为0.25、1.01、2.02、3.21、4.92和6.17dSm-1，研究了水分和盐分对土壤呼吸和土壤微生物量碳的影响。土壤盐分和土壤水分对SR和SMBC均有显著影响，但二者交互作用对SR和SMBC的影响不显著。SR和SMBC与土壤水分呈正相关，但随土壤盐分的增加先增加后沿着降低，在S3和S2盐分水平下分别出现最大值。在S1或S2盐度水平下，它显著高于S5或S6盐度水平。此外，土壤水分是决定SR和SMBC变化的主导因素，其影响显著高于土壤盐分水平。结果表明，在低盐（0.25 ~ 1.01或2.02 dS m-1）条件下，活性微生物群落和总微生物群落均略有增加，而在高盐（4.92和6.17 dS m-1）条件下，活性微生物群落和总微生物群落均受到不利影响。此外，在高盐度和低水分水平下SR的减少主要是由SMBC的减少引起的，因为它被发现与SR显著相关。
Abstract Knowledge concerning the response of soil carbon transformation to soil moisture and salinity is essential for saline soil improvements and utilization. An incubation experiment with three moisture levels (50, 75 and 100% of field capacity) and six salinity levels (soil electrical conductivity of 1 : 5 soil suspension as 0.25, 1.01, 2.02, 3.21, 4.92 and 6.17 dS m –1 for S1, S2, S3, S4, S5 and S6 treatment) was conducted with the purpose to investigate the effect of moisture and salinity on soil respiration (SR) and soil microbial biomass carbon (SMBC). Both soil salinity and soil moisture significantly impact SR and SMBC, yet the interaction effect between them was not significant either for SR, or SMBC. SR and SMBC were found to positively correlate with soil moisture but increased first and then decreased along with increasing soil salinity with the maximum values observed at S3 and S2 salinity levels, respectively. It was found significantly higher at S1 or S2 than at S5 or S6 salinity levels. Furthermore, soil moisture was found to be the predominant factor with significant higher effect than soil salinity levels in determining the variation of SR and SMBC. The results suggested that both the active and total soil microbial communities slightly increased when soil salinity was low (0.25 to 1.01 or 2.02 dS m –1 ), while they were adversely affected by higher salinity (4.92 and 6.17 dS m –1 ). In addition, the reduction in SR at high salinity and low moisture levels is mostly caused by reduction in SMBC as it was found significantly correlated to SR.
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影响因子：
9.7
作者：
Liang, YC;Si, J;Jiang, Y
通讯作者：
Jiang, Y
影响因子：
1.6
作者：
P. N. Nelson;J. Baldock;J. Oades
通讯作者：
P. N. Nelson;J. Baldock;J. Oades
影响因子：
1.4
作者：
I. Yevdokimov;A. Larionova;M. Schmitt;V. O. Lopes de Gerenyu;M. Bahn
通讯作者：
I. Yevdokimov;A. Larionova;M. Schmitt;V. O. Lopes de Gerenyu;M. Bahn
DOI：
10.1007/s40011-016-0801-4
发表时间：
2018-06
期刊：
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences
影响因子：
--
作者：
S. Deb;B. Mandal;P. Bhadoria;E. Schulz;Subhadip Ghosh;M. Debnath
通讯作者：
S. Deb;B. Mandal;P. Bhadoria;E. Schulz;Subhadip Ghosh;M. Debnath
影响因子：
4
作者：
Schlesinger, WH;Andrews, JA
通讯作者：
Andrews, JA