Method for calculating crops production water footprint based on field water and fertilizer utilization process

Abstract

The invention discloses a method for calculating crops production water footprint based on field water and fertilizer utilization process. The method for calculating crops production water footprint based on the field water and fertilizer utilization process comprises steps of determining a calculation object, obtaining related parameters during a crop growing process, such as a fertility stage, precipitation, crop per unit yield, irrigation water consumption, etc, measuring field crop evapo transpiration, calculating blue water consumption and green water consumption, measuring and calculating loss quantity of total nitrogen and total phosphor, calculating a dilution water quantity which can make discharged water reach an acceptable level considering a water quality standard and concentration of the total nitrogen and the total phosphor in a discharged water resource, using the blue water consumption quantity, the green water consumption quantity, a dilution water quantity and crop per unit yield to calculate the crop production blue water footprint, the green water footprint and a grey water footprint of a measuring and calculation object to obtain the crop production water footprint and determine its constitution. The method for calculating crops production water footprint based on the field water and fertilizer utilization process calculates production water footprints of the agriculture products through processes of utilization, conversion and consumption of blue water and green water which reflect the growth of the crops during an agriculture water fertilizer.

Description

technical field [0001] The invention relates to the field of water resources usage and consumption in crop production and the calculation of its impact on the environment, in particular to a method for calculating the water footprint of crop production based on the field water and fertilizer utilization process. Background technique [0002] Improving the efficiency of agricultural water resources utilization is an important way to alleviate the pressure on water resources and ensure food safety production, and this is based on the premise of scientifically assessing the true occupation of water resources during crop production. The water footprint of crop production is a comprehensive evaluation index of the real occupation of water resources in a broad sense by agricultural production, which can comprehensively and quantitatively reveal the water resource consumption and water pollution degree in crop production. [0003] In the prior art, models are often used to simulate...

AI Technical Summary

Problems solved by technology

In this way, not only can the water consumption of crops be calculated under simulated conditions, but at the same time, the gray water footprint of crop production is a hypothetical value, which not only does not reflect the fact of the coordinated migration of water and fertilizer in the farmland, but also cannot truly reveal the impact of crop production on the water environment

The calculation process of crop production water footprint and its components has no clear factual basis, so it is difficult to provide a reliable decision-making basis for the formulation of regional agricultural water resources management policies

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