Study on the Relationship Between Industrial Cannabis Yield and Its Component Factors

In order to clarify the direction of cultivating industrial hemp varieties, six industrial hemp varieties were selected as experimental research objects. Random block experimental design was used to conduct correlation analysis and path analysis to explore the correlation between yield and yield components. The results showed that there were differences in the original stem yield, fiber yield, and yield components among different cities. The original stem yield was highly significantly positively correlated with plant height, stem diameter, total hemp rate, dry stem production rate, and fiber yield. The fiber yield was highly significantly positively correlated with the original stem yield, total hemp rate, and stem diameter, with the most significant correlation between original stem yield and fiber yield being 0.94. The regression equation between industrial hemp yield and its constituent factors reached a significant level（P＜0.05）, with the original stem yield as the dependent variable（Y） and the total hemp rate（X₁）, stem diameter（X₂）, and dry stem production rate（X₃） as independent variables. The optimal linear regression equations were established as follows: Y（original stem yield）=-1.792+0.472X₁+0.390X₂+0.325X₃ and Y（fiber yield）=-1.737+0.765X₁+0.287X₂+0.169X₃.The path analysis results indicated that the direct contributions to the original stem yield and fiber yield werre the total hemp rate and dry stem production rate, which were 0.470, 0.372, and 0.764, 0.311, respectively. However, plant height and stem mainly have an indirect impact on the original stem yield and fiber yield by affecting the total hemp rate and dry stem production rate.