Journal of Hunan Ecological Science

【Objective】It is to study the effect of formulated fertilization on the yield and quality of Polygonatum cyrtonema, identify the optimal fertilization ratio, and provide guidance for the production practice of P. cyrtonema. 【Method】The yield of P. cyrtonema and its quality indexes of polysaccharides, total phenols, saponins and flavonoids, were studied by using three factors of nitrogen, phosphorus and potassium, and the three-factor and three-level orthogonal experimental design was adopted. 【Result】The tuber biomass, aerial biomass and total biomass of T7 (N3P2K1) treatment were the maximums, and T9 increased by 93. 10% , 211. 63% and 123. 12% , respectively, compared with the non-fertilization group. The content of saponins in T7 treatment was higher, which was 43. 33% higher than that of the non-fertilization treatment. The contents of polysaccharides and total phenols were high in T4 and T6. Compared to the non-fertilization treatment, the contents of polysaccharides and total phenols in T4 and T6 increased by over 50% . The highest score for the T7 treatment by principal component analysis was approximately 0. 77. 【Conclusion】Formulated fertilization can significantly improve the yield and quality of P. cyrtonema, and the optimal fertilization scheme for 4-year-old potted P. cyrtonema is 200 kg / hm2 of nitrogen fertilizer, 100 kg / hm2 of phosphate fertilizer and no potassium fertilizer.

Polygonatum cyrtonema; formulated fertilization; yield; quality