RESEARCH ON PROPAGATION OF ROSEMARY (ROSMARINUS OFFICINALIS) BY CUTTINGS IN THAI NGUYEN

Abstract

This study aims to evaluate the propagation potential of rosemary (Rosmarinus officinalis) using the cutting method, focusing on determining the effects of factors such as cutting length, growing media, and rooting stimulants on survival rate and plant formation ability. The research material consisted of one-year-old rosemary plants cultivated in Dong Hy District, Thai Nguyen Province. The study results show that the cutting length, growing media, and rooting stimulants significantly influenced the propagation success of rosemary cuttings in Thai Nguyen: A cutting length of approximately 7 cm yielded better propagation results compared to lengths of 5 cm and 10 cm. Using a substrate supplemented with smoked rice husks or coconut fiber in Rosemary cuttings gives better propagation results. Among the tested formulas, the combination of 40% alluvial soil + 30% burnt rice husks + 30% vermicompost and 40% alluvial soil + 30% coconut coir + 30% vermicompost achieve a nursery success rate of 90%. Using rooting stimulants in rosemary propagation proved more effective than the control group (without stimulants). Among the tested products, the N3M rooting agent, Kina R206 agent, and MD 901 root micronutrient fertilizer showe similar effectiveness, with nursery success rates of 83.3%, 90%, and 96.7%, respectively. The research results provide a scientific basis for optimizing rosemary propagation techniques, contributing to improving production efficiency under local cultivation conditions.