RESUMEN
Objective: To research the effects of different gradient levels of N, P, and K of rhizome of Paris polyphylla var. chinensis yield and quality, determine the optimal fertilization scheme and provide a scientific basis for rational fertilization. Methods: The three-factor five-level quadratic general rotation combination design was adopted for field experiment, correlation measurement and data analysis were carried out, and the effects of combined application of N, P, and K on weight gain rate, total saponin content, ash, moisture and extracts were investigated. Results: The established regression equations reached significant levels. When applying 41.66-52.60 kg/hm2 of N, 181.38-244.38 kg/hm2 of P, 24.16-35.20 kg/hm2 of K, the rhizome weight gain rate of P. polyphylla var. chinensis was greater than 81.72%; When applying 45.48-53.83 kg/hm2 of N, 179.98-236.83 kg/hm2 of P, 29.80-39.95 kg/hm2 of K, the total saponin content in the rhizome of P. polyphylla var. chinensis was greater than 11.09%; When applying 28.01-37.79 kg/hm2 of N, 127.18-209.18 kg/hm2 of P, 25.27-34.09 kg/hm2 of K, the extract content of the rhizome of P. polyphylla var. chinensis was more than 14.31%. Conclusion: The optimum fertilization amount on the rhizome of P. polyphylla var. chinensis was as follow: 37.79-45.48 kg/hm2 of N, 181.38-209.18 kg/hm2 of P, and 29.80-34.09 kg/hm2 of K.
RESUMEN
Objective:To study the influence of harvest time on the characters of Chaenomeles Spciosa ( Sweet) Nakai to determine the optimal harvest time with traditional characters of the Chinese medicine. Methods: In order to explore the optimal harvest time of Chaenomeles Spciosa ( Sweet) Nakai, the content of alcohol-soluble extract, weight and acidity of Chaenomeles Spciosa ( Sweet) Nakai with different harvest time were determined, the weather conditions in recent 3 years was summarized, and the drying process was also studied. Results:The average weight of Chaenomeles Spciosa(Sweet)Nakai was the lowest in June and highest in August, and the den-sity reached maximum in mid-July. During the whole harvest time, the content of alcohol-soluble extract was stable. The weather con-ditions from mid-July to late-July were with high temperature, dry and little rain, which was suitable for drying of Chaenomeles Spciosa ( Sweet) Nakai. Conclusion:The optimal harvest time of Chaenomeles Spciosa( Sweet) Nakai is confirmed in mid-July according to the traditional customs, drying conditions and characters of the Chinese medicine.