Study on Water Requirement Pattern and Aboveground Biomass Change of Glycyrrhizauralensis Under the Water Stress Conditions

Abstract

Water saving irrigation was conducted on artificially cultivated Glycyrrhizauralensis based on the principle of insufficient irrigation. Water saving technical system was constructed considering the actual situation of large area planting Glycyrrhizauralensis in arid area. The research was an importance to improve the utilization efficiency of limited water resources in sand area. Water requirement of Glycyrrhizauralensis was researched and the influence of water shortage in different stages on the aboveground biomass of Glycyrrhizauralensis and water sensitive period of Glycyrrhizauralensis were studied in the desert ecological recycling industry park of Elion Resources Group, The industry park was located in the heart of the kubuqi desert. The results showed that the water requirement rule in the whole life circle was a two times parabola of single peak value, the maximum daily water consumption in flowering period was 4.5mm/d which was the moisture sensitive period of Glycyrrhizauralensis. Water shortage at flowering period hada greatest impact on aboveground biomass under moderate drought conditions, the yield was reduced by 48.7% and the effect of the turning green period was minimal.