caa a22 4500 606219455 CHVBK 20210128101118.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s11104-015-2534-1 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2534-1 Effect of irrigation on the soil respiration of constructed grasslands in Inner Mongolia, China [Elektronische Daten] [Ji-Rui Gong, Sha Xu, Yihui Wang, Qinpu Luo, Min Liu, Wei Zhang] Aims: We tested the responses of soil respiration to irrigation, at different proportions of field capacity, in constructed grasslands in the Inner Mongolia Autonomous Region of northern China, and tried to identify the underlying physiological mechanisms. Methods: The experiment included a legume (Medicago sativa) and a forage grass (Elymus nutans) in sole-crops and a mixed sowing, with four water treatments: a control and three levels of irrigation (low, medium, and high) at three application times: during the regreening, elongation, and heading stages. Results: The soil respiration rate (R s) responded strongly to water addition. Irrigation increased the cumulative growing season R s, which ranged from 257g C m−2years−1 to 500g C m−2years−1 for M. sativa, from 299 to 391g C m−2years−1 for E. nutans + M. sativa, and from 209 to 296g C m−2years−1 for E. nutans. Irrigation increased the cumulative R s by 7 to 49%. R s of the grass-legume mixture was 1.2 to 1.4 times the corresponding values in the E. nutans plots. In addition to the effects of soil temperature and moisture content, R s was explained by differences in the net photosynthetic rate and in microbial biomass. Water addition increased Q 10, which was strongly and positively correlated with the total C, C/N ratio, and cellulose content of the plants. Conclusions: R s responded strongly to irrigation, although the response differed between the two species. The grass-legume mixtures showed increased R s compared to values in the grass sole-crop. R s appears to be determined by moisture and temperature, but also by the net photosynthetic rate and by microbial properties such as microbial biomass. Springer International Publishing Switzerland, 2015 Soil respiration nationallicence Irrigation nationallicence Constructed grasslands nationallicence Grass-legume mixtures nationallicence Q 10 nationallicence Gong Ji-Rui State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut Xu Sha State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut Wang Yihui State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut Luo Qinpu State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut Liu Min State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut Zhang Wei Key Laboratory of Tourism and Resources Environment in Universities of Shandong, Taishan University, 271021, Taian, China aut Plant and Soil Springer International Publishing 395/1-2(2015-10-01), 159-172 0032-079X 395:1-2<159 2015 395 11104 https://doi.org/10.1007/s11104-015-2534-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2534-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gong Ji-Rui State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Xu Sha State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Wang Yihui State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Luo Qinpu State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Liu Min State Key Laboratory of Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Zhang Wei Key Laboratory of Tourism and Resources Environment in Universities of Shandong, Taishan University, 271021, Taian, China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 395/1-2(2015-10-01), 159-172 0032-079X 395:1-2<159 2015 395 11104