Effects of surface grass covering technology on soil water and heat conditions,physicochemical properties,lily growth,and yield in cold and dry lily planting areas were investigated.Using a randomized block design,experimental treatments were open field,surface grass covering,and plastic film covering,with 3 replicates for a total of 9 treatments.Results showed that surface grass cover-ing technology of lilies could significantly improve soil water and heat conditions,increase content of soil physical and chemical proper-ties indicators,and increase yield of lilies.Compared with open field treatment,surface grass covering treatment increased surface soil temperature and moisture content by 18.86%and 2.23 percentage points,soil organic matter by 0.31 percentage points,alkaline nitrogen,available phosphorus,and available potassium content by 18.12%,21.04%,and 10.41%,respectively.Plant height,stem diameter,ball horizontal diameter,ball vertical diameter,bulb weight,and yield increased by 8.26%,22.22%,16.55%,23.47%,32.83%,and 35.07%,respectively.In cold and drought lily planting areas,surface grass covering technology is an important field management measure.
lilysurface grass covering technologyhydrothermal conditionsphysical and chemical propertiesfield management measure
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