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Temporal and spatial changes of water footprint in spring corn production
in Liaoning province
1 2 3 1
FENG Xingxing ,WANG Xuefeng ,YNAG Hui ,CAO Yongqiang
(1. School of Geographical Sciences,Liaoning Normal University,LiaoNing,Dalian 116029,China;
2. China Institute of Water Resources and Hydropower Research,Beijing 100038,China;
3. Reconnaissance Bureau of Hydrology and Water Resource,Tibet Autonomous Region,Lasa 850000,China)
Abstract: In order to reduce the high consumption of water resources for crops in agricultural activities
and improve water use efficiency, the real consumption of green, blue and gray water footprint is calculated
respectively based on the daily meteorological data from 19 stations and spring corn production data of Lia⁃
oning Province from 1987 to 2018. The results show that (1) The water footprint of spring corn production
3
in Liaoning Province has no significant changes since 2002,with a multi-year average value of 1424.21 m /t.
The footprints of green water,gray water and blue water are 54%,27% and 19% respectively. (2) The val⁃
ue of green water footprint of spring corn in Liaoning Province decreases at a rate of 6.28 m3/t per year.
In terms of spatial distribution,the high value of green water footprint in 2002 is mainly in the eastern re⁃
gion. The value of green water footprint in Liaoning Province is relatively high in 2010. (3) The value of
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blue water footprint increases at a rate of 1.06 m /t per year. The high value of blue water footprint of
spring corn in Liaoning Province is mainly in Bohai Sea,Kuandian and their surrounding areas. The value
of blue water footprint is relatively low in most areas of Liaoning Province in 2010. (4) The value of gray
water footprint decreases at a rate of 14.03 m3/t per year,which is mainly related to crop yield and nitro⁃
gen fertilizer application.
Keywords:water footprint;green water footprint;blue water footprint;gray water footprint;spring corn
(责任编辑:祁 伟)
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