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Water-saving agriculture can deliver deep water cuts for China
کشاورزی با صرفه جویی در آب می تواند کاهش عمیق آب را برای چین به همراه آورد-2020 China is working hard to reconcile growing demands for freshwater with already oversubscribed renewable
water resources. However, the knowledge essential for setting and achieving the intended water consumption
cuts remains limited. Here we show that on-farm water management interventions such as improved irrigation
and soil management practices for maize cultivation can lead to substantial water consumption reductions, by a
simulated total of 28–46 % (7–14 billion m3/year) nationally, with or without the impacts of climate change.
The water consumption cut is equivalent to 16–31 % of the ultimate capacity of the South-North Water Transfer
Project. Much of the reduction is achievable at the populous and water-stressed North China Plain and Northeast
China. Meanwhile, the interventions can increase maize production by an estimated 7–15 %, meeting 22–28 %
of demand increase projected for 2050. The water management and food production improvements obtained are
crucial for achieving multiple Sustainable Development Goals (SDGs) related to water, land, and food in China
and far beyond. Keywords: Deep water saving | Irrigation water consumption | Integrated on-farm water management | interventions |
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