IMHE OpenIR  > 山地表生过程与生态调控重点实验室
The Effect of Grassland Management History on Soil Carbon Response to Slurry and Urea
Cui, Junfang1; Holden, Nicholas2
Corresponding AuthorCui,Junfang
2017-11-17
Source PublicationOpen Access Library Journal
ISSN2333-9705
Volume4Pages:e4072
Abstract

Slurry and urea applications are part of normal nutrient management on
grassland farms utilizing grazed grass and silage for animal production. It was
hypothesized that management history would result in a different carbon response
to slurry and urea applications for the same soil type because of differences
in soil micro-environment, including microbial biomass and activity,
are formed and regulated by long-term management history. An Irish grassland
soil of the Skeagh Series was sampled in three fields, each with a long,
consistent management history: Soil A was associated with extensive grazing
by horses; soil B with medium intensity grazing by sheep and cattle, and grass
silage conservation; and soil C with intensive dairy cow grazing. There were
three slurry treatments (S1, the control of no slurry; S2, slurry mixed with soil;
S3, slurry added on the soil surface) and three urea treatments (N1, the control
of no urea; N2, all urea applied at one time; and N3, three application, 30 days
apart, totaling the same amount of urea as N2) designed to supply 36 g C m−2
and 2 g N m−2 during an 85 day incubation trial. Soil pH, total carbon, cold
water extractable organic carbon, soil respiration and two C-related enzymes
(β-glucosidase and CM-cellulase) were measured. All measured soil properties
showed a significant difference (P < 0.05) by management history, indicating
a strong influence of long-term management on response. β-glucosidase and
CM-cellulase activity showed a strong relationship with soil management history
rather than with slurry or urea additions. It was concluded that management
history was important to C dynamics. Slurry mixed with soil resulted in
a greater soil carbon loss than slurry applied on the soil surface. One large
dose of urea caused greater soil carbon loss than multiple small doses.

KeywordSoil Carbon Management History Slurry Urea Enzyme
DOI10.4236/oalib.1104072
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Indexed By其他
Language英语
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20697
Collection山地表生过程与生态调控重点实验室
Affiliation1.Institute of Mountain Hazards and Environment, CAS, Chengdu, China
2.UCD School of Biosystems Engineering, University College Dublin, Dublin 4, Ireland
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Cui, Junfang,Holden, Nicholas. The Effect of Grassland Management History on Soil Carbon Response to Slurry and Urea[J]. Open Access Library Journal,2017,4:e4072.
APA Cui, Junfang,&Holden, Nicholas.(2017).The Effect of Grassland Management History on Soil Carbon Response to Slurry and Urea.Open Access Library Journal,4,e4072.
MLA Cui, Junfang,et al."The Effect of Grassland Management History on Soil Carbon Response to Slurry and Urea".Open Access Library Journal 4(2017):e4072.
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