Impact of diurnal unsymmetrical warming on soil respiration in an agroecological system of the Lhasa region

PLoS One. 2019 May 29;14(5):e0217575. doi: 10.1371/journal.pone.0217575. eCollection 2019.

Abstract

Purpose: The impact of diurnal unsymmetrical rise in temperature on soil respiration (Rs) is not fully understood; thus, we explored such a warming influence on Rs in an agroecological system of the Lhasa.

Materials and methods: A field warming experiment (C: control; DW: daytime warming; NW: nighttime warming; DW+NW: daytime plus nighttime warming) was carried out in a naked barley ecological system.

Results and discussion: The DW, NW and DW+NW treatments dramatically increased soil temperature and decreased soil moisture but did not markedly modify Rs. The effects of DW and NW on soil respiration sensitivity (Q10) during the daytime and nighttime were different; they had no effects on daytime Q10 of Rs, but a significant inhibitory effect on nighttime Q10 of Rs.

Conclusions: A diurnal unsymmetrical rise in temperature brought about different results for the Q10 of Rs but did not cause changes in Rs under different experimental treatments in agroecological systems of the Lhasa.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • China
  • Ecosystem*
  • Hot Temperature*
  • Seasons*
  • Soil*

Substances

  • Soil

Grants and funding

The research was sponsored by the National Natural Science Foundation of China [31370458, 31600432, 41571042], National Key R&D Program of China [2017YFA0604801, 2016YFC0502005], Youth Innovation Research Team Project [LENOM2016Q0002], the Bingwei Outstanding Young Talents Program of Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences [2018RC202] and the Tibet Science and Technology Major Projects of the Pratacultural Industry [XZ201901NA03]. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.