Optimizing regional cropping systems with a dynamic adaptation strategy for water sustainable agriculture in the Hebei Plain

15774 10 86801 3 246570 document 86801 Revision3-Optimizing regional cropping systems-Manuscript_(clean).pdf application/pdf 0cc97126bb66738aa08dd626f9a79a5b MD5 2310307 2019-03-05 06:43:06 https://pure.iiasa.ac.at/id/eprint/15774/1/Revision3-Optimizing%20regional%20cropping%20systems-Manuscript_%28clean%29.pdf 15774 1 1 application/pdf text en public cc_by_nc_nd_4

Revision3-Optimizing regional cropping systems-Manuscript_(clean).pdf

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/86801 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/86801 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/86801 archive 353 disk0/00/01/57/74 2019-03-04 07:17:38 2025-08-05 14:50:44 2019-03-04 07:17:38 article show Zhong H. Sun L. 1681 Fischer G. 276 Tian Z. Liang Z. Optimizing regional cropping systems with a dynamic adaptation strategy for water sustainable agriculture in the Hebei Plain pub prog_wat China; Cropping system adaptation; Groundwater overexploitation; Relay intercropping system; The Hebei Plain; Water sustainable agriculture Unsustainable overexploitation of groundwater for agricultural irrigation has led to rapid groundwater depletion and severe environmental damage in the semi-arid Hebei Plain of China. Field experiments have recommended annual winter fallowing (i.e., forgoing winter wheat production) as the most effective way to replenish groundwater. However, adopting the recommendation across the Hebei Plain would lead to a significant reduction in total wheat production. This research aims to find the most favorable water-sustainable cropping systems for different localities in the Hebei Plain, which at the regional aggregation level maintains the uppermost overall levels of wheat and grain production respectively. Our simulations indicate that in the Hebei Plain, an optimal allocation of a wheat-early maize relay intercropping system and an early maize-winter fallow cropping system across the Hebei Plain could lead to significant water savings while minimizing grain production losses to around 11%. Compared to the prevailing wheat and summer maize cropping system, to prevent a drop in the water table, 39% of the current wheat cropping land would need to be fallowed in winter, reducing irrigation water use by 2639 × 106 m3. Replacing the prevailing wheat and summer maize cropping system with our optimized allocation system could lead to a 36% increase in total maize production and 39% decrease in total wheat production, resulting in total agricultural irrigation water savings of 2322 × 106 m3 and a total grain production reduction by 11%. The findings indicate the potential benefits of our cropping system adaptation method to meet the challenge of recovering local groundwater level with the least possible reduction of wheat and total grain production in the Hebei Plain. 2019-07 published Elsevier 10.1016/j.agsy.2019.02.005 302 89 public Agricultural Systems 173 94-106 TRUE 1873-2267 GAEZ FALSE no info:eu-repo/semantics/article