Đánh giá dấu chân nước xám trên cây hoa cúc canh tác tại khu vực thượng nguồn Hồ Xuân Hương, Thành Phố Đà Lạt

Abstract

This study was conducted to assess the grey water footprint andpropose solutions to reduce the grey water footprint inchrysanthemum cultivation in the upstream area of Xuan Huong Lake,Da Lat City. Based on the survey results of 27 hectares ofchrysanthemum farming land in the study area and applying themethodology of the Water Footprint Network (WFN) to determine thegrey water footprint, that caused by the use of fertilizer in thecultivation chrysanthemum process. The total calculated grey waterfootprint is about 946,26 m3/ton of product. Grey water footprintsfrom fertilizer sources containing nitrogen account for 33% of thetotal grey water footprint, while this amount accounts for 67% fromsources containing phosphorus. Good sustainable agriculturalpractices based on technical guidelines can reduce grey waterfootprints, reduce water pollution effectively. Specifically, grey waterfootprints caused by N can be reduced by about 30,34% and by Pabout 37,19%. The total grey water footprint can be cut is 330,70m3/ton of product