壳寡糖浸根和叶面喷施对北疆引种西梅生长和光合特性的影响OA

To investigate the effects of chitooligosaccharide(COS)root soaking and foliar spraying on the growth and photosynthetic characteristics of introduced Prunus domestica in northern Xinjiang,this study utilized the'Stella'plum cultivar with four treatments:control(CK),root soaking(S1),foliar spraying(S2),and combined root soaking+foliar spraying(S1+S2).The impacts on plant growth,photosynthetic parameters,and dry matter accumulation were analyzed.Results indicated that the S1+S2 treatment significantly enhanced plum growth,increasing plant height and leaf area by 15.6％and 22.5％,respectively,compared to CK in the first year after planting,and by 13.4％and 19.3％in the second year.Concurrently,S1+S2 significantly improved SPAD values,net photosynthetic rate,and stomatal conductance by 10.9％,15.1％,and 32.5％,respectively,in the first year,while optimizing light energy utilization efficiency through increased actual photochemical efficiency(ΦPS Ⅱ)and photochemical quenching coefficient(qP).Ultimately,S1+S2 resulted in a 33.4％increase in dry matter accumulation compared to CK in the second year,significantly outperforming other single treatments.In conclusion,the combined COS root soaking and foliar spraying treatment effectively enhanced stress resistance and promoted biomass accumulation in introduced Prunus domestica by improving photosynthetic performance and plant establishment.This study provides theoretical and practical insights for optimizing fruit tree cultivation techniques in arid regions.