越冬地表覆盖对卷丹生长特性与多糖含量的影响OA

In order to study the impact of overwintering surface coverage on the growth and photosynthetic characteristics,yield formation and quality of Lilium lancifolium,an experiment was carried out from September 2022 to August 2023 at Longshan County,Hunan Province.With no coverage as a control,two coverage treatments of fresh straw coverage and dry straw coverage were set up to compare the growth characteristics indicators,yield and quality of Lilium lancifolium under different treatments.The results showed that the mulch treatment promoted the plant height,ground diameter,leaf area,fresh yield,bulb circumference and polysaccharide content of Lilium lancifolium.The circumferential diameter and fresh yield of Lilium lancifolium treated with fresh thatched covering significantly increased by 6.17％and 9.62％compared with the control.The daily average net photosynthetic rate,intercellular CO2 concentration,stomatal conductance and transpira-tion rate of Lilium lancifolium treated with dry straw were higher,and the fresh yield and circumferential diameter were sig-nificantly increased by 10.41％and 8.56％respectively compared with the control,and the polysaccharide content was sig-nificantly increased by 5.54％and 9.45％respectively compared with the fresh thatched covering treatment and the con-trol.Comprehensive analysis shows that overwintering surface covering can promote the growth of Lilium lancifolium and improve its photosynthetic characteristics,yield and polysaccharide content.Under the conditions of this test,the covering effect with dry rice straw is better.