Research on water footprint of main crops production in Baoding, China

Abstract

Based on the monthly meteorological data and basic agricultural data of Baoding Meteorological Station, this paper uses the Penman formula combined with CROPWAT software, and the gray water footprint calculation manual to calculate and analyze the production water consumption coefficient and production water of the main crops in Baoding in 2018. The results show that the water consumption coefficients of the main crops in Baoding city are cotton, peanut, rice, wheat, soybean, corn and vegetables. The water requirement of wheat in the whole growth period is mainly blue water, and the corn water requirement is mainly green water; the gray water footprint of all crops is greater than the blue water footprint. In 2018, the total production water footprint of major crops in Baoding was 65.31×108m³, of which the blue water footprint was 18.93×108m³, the green water footprint was 13.06×108m³, and the gray water footprint was 33.31×108m³. The sum of the blue water and gray water footprints is much larger than Baoding’s average available water resources, and the regional water shortage is serious. Therefore, Baoding should further optimize the agricultural planting structure in order to protect the water resources and environment, and at the same time promote the reduction of pesticides and fertilizers to increase efficiency.