| As we all know,agriculture is the main sector of water use,Nowadays,due to the increasing population and the rapid growth of GDP,water pollution and the decline of water environment carrying capacity are increasingly prominent.Therefore,ensuring the safety of agricultural water use is not only related to the national economy and people 's livelihood,but also an urgent issue.The Central Plains Economic Region is a key area for China's agricultural economic development.In this paper,it is taken as the research object to analyze the temporal and spatial difference characteristics of the real water consumption of crops and the change law of the influencing factors.The research work and achievements are as follows:(1)Based on the water footprint theory,the water footprint of rice,wheat,corn,beans,oil and cotton production Central Plains Economic Region from 2003 to 2017 was calculated.secondly,the overall situation in the spatial trend surface analysis and ESDA spatial exploratory analysis method was used Moran index,local Moran scatter plot,hot spot analysis and other methods analyzed the spatial and temporal differentiation and spatial correlation pattern of crop production water footprint;using global spatial econometric regression and geographic weighted regression model,the influence of meteorological and agricultural production factors on the water footprint of crop production was studied.(2)The results show that: six kinds of crops and their components all showed a downward trend of fluctuation;corn,beans,oilseeds and cotton mainly consumed green water;rice and wheat were mainly consumed blue water;The characteristics of the spatial distribution of crop water footprints in different cities are obvious: the east-west direction is roughly U-shaped,the western region is much higher than the centraleastern region,and the central region is slightly higher than the eastern region;the north-south shows an inverted U-shaped curve,and the central region is high.The north-south area is low;the overall spatial agglomeration shows a weakeningenhancing-weakening trend;the spatial dualistic structure of each city is prominent,and the cold and hot spots are interlaced and distributed.The sub-cold area is mainly in the central region;The influence of meteorology and agricultural production factors on the water footprint of crop production is spatially heterogeneous: on the whole,the total power of agricultural mechanization,the use of agricultural diesel and the water footprint of crop production have a significant spatial negative correlation;Rainfall is a positive effect;between different cities: the total power of agricultural machinery is mainly negative,changing from high in the south to low in the north to low in the north,the difference varies significantly;The effect of effective irrigation area is large and there is a positive and negative correlation transformation,from southwest to northeast gradually increasing to southeast to northwest weakening;the use of agricultural diesel oil is mainly negative,the difference is small,from southeast to northwest gradually increasing to southwest to northeast gradually increasing;the application of nitrogen fertilizer is positive,the difference is small and stable;the effect of effective rainfall is large and different Obviously,from negative correlation to positive correlation,from west to east to north to south.According to the above research,it is proposed to adjust the crop planting layout and structure,efficiently use green and blue water,reasonably control the amount of fertilizer applied,improve the level of agricultural mechanization,improve agricultural water-saving management measures,and take into account water resources to reduce the water footprint of crop production specific suggestions for protection and development. |
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