20个薄荷品种扦插及水培生根能力比较分析OA

[Objective]By studying the rooting ability of 3 parts(tender branch,middle part,and base)of 20 Mentha canadensis varieties un-der cutting and hydroponic conditions to screen Mentha canadensis materials that are easy to propagate and promote,providing reference for the large-scale production and promotion of Mentha canadensis.[Method]Using 3 parts of 20 Mentha canadensis varieties as materials,cutting and hydroponic experiments were conducted to determine the rooting rate and root length for evaluation and analysis.[Result]The survival rate of Mentha canadensis cuttings in the middle part was high,and the root length was also long.The survival rate of"Mentha×piperita cv.Choco-late"cuttings was the highest,the survival rate of"Melissa officinalis"cuttings was the lowest,the root length of"Mentha spicata"was the lon-gest,and the root length of"Nepeta cataria"was the shortest.Hydroponic cultivation could shorten the seedling growth time of Mentha canaden-sis.After 3 d of planting,the cutting begin to take root.Compared with the base and middle parts,tender branches had longer rooting time,lon-ger roots,and higher rooting rate."Mentha×piperita cv.Chocolate"was easy to root in hydroponics,"Nepeta cataria"was difficult to root in hydroponics,"Mentha×piperita cv.Candy"had the longest root length,and"Nepeta cataria"had the shortest root length.Except for"Nepeta cataria",all other varieties had a rooting rate of 100%after 15 d of hydroponics.The survival rate of most Mentha canadensis after hydroponic treatment and transplantation was 100%,with the best survival rate observed in the transplantation of tender branches.[Conclusion]The rooting ability of different varieties and parts of Mentha canadensis varies,and the difficulty of cutting varies,The effect of middle part cutting is the best.Among them,"Mentha spicata"have easier rooting ability;the rooting situation of"Mentha spicata cv.Strawberry"is ordinary,while"Nepeta cataria"is difficult to root.Except for"Nepeta cataria"which is not suitable for hydroponic cultivation,all other varieties can be prop-agated and hydroponically cultivated.The hydroponic and transplanting survival rates of Mentha canadensis tender branches are high,making it the preferred location for hydroponic cultivation.Compared with propagation,hydroponic cultivation has a shorter seedling growth time and uni-form emergence.