Journal
JOURNAL OF ARID ENVIRONMENTS
Volume 100, Issue -, Pages 31-41Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jaridenv.2013.10.004
Keywords
Biome-BGC model; Agricultural oasis; Human activities; Carbon cycle; Water shortage
Categories
Funding
- National Program on Key Basic Research Project of China [2009CB825105]
- Chinese Academy of Sciences [Y174051001]
- Natural Science Foundation of China [41101101]
Ask authors/readers for more resources
Cropland area in north-western China has quadrupled over the past 50 years. The effects of this rapid expansion on regional carbon and water budgets have not been examined quantitatively. In this study, an enhanced Biome-BGC model including crop growth processes was used to quantify the effects on regional net primary productivity (NPP) and evapotranspiration (ET) in a representative catchment. The model results were in good agreement with biometric measurements. The catchment-scale total NPP (TNPP) and total ET (TET) increased by 81.8% and 89.4%, respectively. The increase in cropland area (LUCC) explained 40.3% and 60.5% of the increased TNPP and TET, while management practices (Mana) accounted for 46.1% and 16.8% of the increased TNPP and TET, respectively. Climate change (CLM) had the least influence on the increase in TNPP and TET (accounting for 1.8% and 4.7%). As assuming no interactions between CLM and LUCC, we detected effects of interactions between CLM and Mana (accounting for 10% and 16.8%) and between Mana and LUCC (accounting for 1.8% and 4.7%) on the increased TNPP and TET. These results implied that the rapid expansion of cropland and intensive agricultural management practices had important effects on regional carbon and water budgets. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available