Journal of Hunan Ecological Science

【Objective】To explore the effects of four soil enzyme activities on the yield and quality of Polygonatum cyrtonema, and provide scientific basis for its cultivation and management. 【Method】The yield and quality indicators of P. cyrtonema were determined in 14 sample plots in Hunan Province, and the activities of phosphatase, urease, dehydrogenase, and cellulase in the soil of the sample plots were measured. Evaluate the impact of soil enzyme activity on plant yield and medicinal components through variance analysis and correlation analysis, and further screen key soil enzyme activity factors. 【Result】 Non rhizosphere soil phosphatase activity was significantly positively correlated with tuber fresh weight (r=0. 372, P<0. 05) and dry weight (r=0. 491, P<0. 01). For every 1 unit increase in activity, fresh weight and dry weight increased by 21. 89 g and 6. 63 g, respectively; the cellulase activity in non rhizo- sphere soil also had a significant positive effect on fresh weight (β = 16. 40, P<0. 05) and dry weight (β =8. 22, P<0. 01), and every 1 unit increase could increase the polysaccharide content by 6. 68 mg / g (P<0. 05). The dehydrogenase activity was significantly negatively correlated with the dry matter accu- mulation rate (β = -0. 130, P<0. 01), indicating that excessive activity may inhibit dry matter accumula- tion. Although the enzyme activity in rhizosphere soil was generally higher than that in non rhizosphere soil, its direct impact on plant nutrient utilization was relatively weak. In addition, phosphatase activity showed a potential positive contribution to saponin content (β =3. 52, P<0. 05), while the overall corre- lation between saponin and total phenolic content and enzyme activity was low. 【Conclusion】Soil enzyme activity has a significant impact on the yield and quality of P. cyrtonema, with non rhizosphere soil phos- phatase and cellulase activity being key factors in improving yield and quality. Reasonable control of de- hydrogenase activity can help improve dry matter accumulation efficiency.

soil enzyme; Polygonatum cyrtonema; yield; quality