ISWC OpenIR  > 水保所科研产出--SCI  > 2017--SCI
Using ultrasonic energy to elucidate the effects of decomposing plant residues on soil aggregation
Zhu, Zhaolong1,2; Angers, Denis A.3; Field, Damien J.2; Minasny, Budiman2; Zhu, ZL (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2017
Source PublicationSOIL & TILLAGE RESEARCH
ISSN0167-1987
description.correspondentemailzhu_zl@nwsuaf.edu.cn
Volume167Pages:1-8
AbstractWater-stable soil aggregates are generally formed following the addition of organic materials in soils. This process is mediated by the interaction between microbes and soil organic matter in ways that are still not completely understood. To get insight into the effects of decomposing plant residues on aggregate dynamics, a clay soil with an inherently low soil organic carbon (SOC) content, was amended with two different sources of organic matter (alfalfa, C:N = 16.7 and barley straw, C:N = 95.6) at different input levels (0,10, 20, & 30 g C kg(-1) soil). These were incubated for a period of 3 months over which soil respiration was assessed using the NaOH capture method, water aggregate stability was determined with the mean weight diameter (MWD) by wet sieving, and the relative strength of aggregates exposed to ultrasonic agitation was modelled using the aggregate disruption characteristic curve (ADCC) and soil dispersion characteristic curve (SDCC). As expected, the quality and quantity of organic matter added controlled the respiration rate, with alfalfa (0.457 g CO2-Cg(-1) C for total respiration rate) being greater than barley amended samples (0.178 g CO2-Cg(-1) C) at any C input rate. Both residue quality and quantity of organic matter input also influenced the amount of aggregates formed and their relative strength. The MWD of soils amended with alfalfa residues was greater than that of barley straw at lower input rates and early in the incubation (e.g. at 28 days of incubation and at a rate of 10 g C kg(-1) soil, MWD was 575 mu m and 731 mu m for barley straw and alfalfa, respectively). However, in the longer term (84 days of incubation), the use of ultrasonic energy revealed that barley straw resulted in stronger aggregates, especially at higher input rates despite showing similar MWD as alfalfa. The use of ultrasonic agitation, where we quantify the energy required to liberate and disperse aggregates allowed us to differentiate the effects of C inputs on the size of stable aggregates and their relative strength. (C) 2016 Elsevier B.V. All rights reserved.
KeywordAggregate Stability Organic Matter Ultrasonic Energy Relative Soil Strength
Subject AreaAgriculture
DOI10.1016/j.still.2016.10.002
URL查看原文
Indexed BySCI
Publication PlaceAMSTERDAM
Language英语
WOS IDWOS:000393005600001
PublisherELSEVIER SCIENCE BV
Funding OrganizationNSFC project [41101201]; Natural Science Basic Research Plan in Shaanxi Province, China [2011JQ5009]; University of Sydney ; NSFC project [41101201]; Natural Science Basic Research Plan in Shaanxi Province, China [2011JQ5009]; University of Sydney
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8016
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorZhu, ZL (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Univ Sydney, Fac Agr & Environm, Biomed Bldg C81,1 Cent Ave,Australian Technol Pk, Sydney, NSW 2015, Australia
3.Agr & Agri Food Canada, Quebec Res & Dev Ctr, 2560 Hochelaga Blvd, Quebec City, PQ G1V 2J3, Canada
Recommended Citation
GB/T 7714
Zhu, Zhaolong,Angers, Denis A.,Field, Damien J.,et al. Using ultrasonic energy to elucidate the effects of decomposing plant residues on soil aggregation[J]. SOIL & TILLAGE RESEARCH,2017,167:1-8.
APA Zhu, Zhaolong,Angers, Denis A.,Field, Damien J.,Minasny, Budiman,&Zhu, ZL .(2017).Using ultrasonic energy to elucidate the effects of decomposing plant residues on soil aggregation.SOIL & TILLAGE RESEARCH,167,1-8.
MLA Zhu, Zhaolong,et al."Using ultrasonic energy to elucidate the effects of decomposing plant residues on soil aggregation".SOIL & TILLAGE RESEARCH 167(2017):1-8.
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