ISWC OpenIR  > 水保所2018届毕业生论文
Temperature sensitivity of soil respiration to nitrogen and phosphorous fertilization: Does soil initial fertility matter?
Qiqi Sun1,2; Rui Wang3; Ying Wang1,2; Lanlan Du4; Man Zhao3; Xin Gao4; Yaxian Hu4; Shengli Guo1,2,3
2018-04
Source PublicationGeoderma
description.correspondentemailslguo@ms.iswc.ac.cn
Volume325Issue:1Pages:172–182
AbstractTemperature sensitivity of soil respiration (Q10) is an important parameter when modeling the effects of global
warming on terrestrial ecosystem carbon release. Widely applied chemical fertilizers can signi
ficantly affect soil
productivity and carbon cycling in agroecosystems. However, little is known about how
Q10 responds to chemical fertilization under different levels of initial soil fertility. On the Chinese Loess Plateau, changes in soil
respiration rates and
Q10 were investigated in soils of two fertility levels: low fertility (L) and high fertility (H).
For each soil fertility level, there was one control plot and one chemical fertilized plot (+NP), which in total
formed four treatments: L, L + NP, H and H + NP. All the treatments were replicated for three times on a
continuous winter wheat cropping system. Respiration rates of surface soil in each treatment were in situ
monitored from October 2010 through September 2015. Our results showed that after NP fertilization, soil
respiration rates were increased by 46% in low fertility soil, yet only by 14% in high fertility soil (
P < 0.05).
The
Q10 after NP fertilization was significantly decreased by 6.9% in low fertility soil, but was unchanged in the
high fertility soil. The
Q10 variation might be attributed to the different response of microbial respiration Q10 in
the two soils. The decreased
Q10 with NP fertilization in the low fertility soil was possibly due to N-induced
increase of substrate quality for soil microbes and increased activities of both cellobiohydrolase and polyphenol
oxidase. In the high fertility soil, the unchanged
Q10 with NP fertilization may be the integrated result of less
a
ffected substrate quality and neutral response of polyphenol oxidase activity. Overall, our results suggested that
the e
ffects of NP fertilization on soil respiration and its temperature sensitivity varied with soil initial fertility
levels, and therefore must be properly accounted for when estimating potential e
ffects of local agricultural
management to regional agroecosystems under future climate conditions.

KeywordSoil Fertility Np Fertilization Q10 Soil Respiration
Subject Area农学
DOIhttps://doi.org/10.1016/j.geoderma.2018.04.001
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8168
Collection水保所2018届毕业生论文
Corresponding AuthorShengli Guo
Affiliation1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shannxi 712100, PR China
2.University of Chinese Academy of Sciences, Beijing 100049, PR China
3.College of Resources and Environment, Northwest A&F University, Yangling, Shannxi 712100, PR China
4.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, PR China
Recommended Citation
GB/T 7714
Qiqi Sun,Rui Wang,Ying Wang,et al. Temperature sensitivity of soil respiration to nitrogen and phosphorous fertilization: Does soil initial fertility matter?[J]. Geoderma,2018,325(1):172–182.
APA Qiqi Sun.,Rui Wang.,Ying Wang.,Lanlan Du.,Man Zhao.,...&Shengli Guo.(2018).Temperature sensitivity of soil respiration to nitrogen and phosphorous fertilization: Does soil initial fertility matter?.Geoderma,325(1),172–182.
MLA Qiqi Sun,et al."Temperature sensitivity of soil respiration to nitrogen and phosphorous fertilization: Does soil initial fertility matter?".Geoderma 325.1(2018):172–182.
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