Grading of Seed Rhizoma for Curcuma phaeocaulis and Its Effect on Plant Growth， Yield and Quality of Medicinal Materials / 中国实验方剂学杂志

ABSTRACT

Objective:To establish the grading standard of <italic>Curcuma phaeocaulis</italic> seed rhizoma，and explore the effect of seed rhizoma classification on the growth，yield and quality of <italic>C. phaeocaulis</italic>. Method:The purity，diameter，weight，length，germination rate and water content of <italic>C. phaeocaulis</italic> seed rhizoma samples were determined. The grading index was determined by partial correlation analysis，variance analysis and cluster analysis. According to actual conditions of production，the classification standard of<italic> C. phaeocaulis</italic> seed rhizoma was established. Then the field experiments were carried out with different grades of seed rhizoma for treatment， so as to analyze the effect of seed rhizoma grade on plant growth，yield and quality of medicinal materials. Result:With seed rhizoma diameter and seed rhizoma weight as classification indexes，<italic>C. phaeocaulis</italic> seed rhizoma were divided into three grades. The field experiments showed that with the growth and development of <italic>C. phaeocaulis</italic>，there were significant differences in plant height and leaf length among different grades of seed rhizoma during the root tuber expansion period （<italic>P</italic><0.05）. The yield of Curcumae Radix and Curcumae Rhizoma produced by different grades of seed rhizoma was in the order of first-class ginger>second-class ginger>third-class ginger>substandard seed rhizoma. According to the analysis of the proportion of the commodity grade of medicinal materials，the higher the grade of seed rhizoma was，the higher the proportion of the first-grade Curcumae Radix occupied. According to the analysis of the quality of medicinal materials，there was no significant difference in the content of extract，volatile oil and germanone in Curcumae Radix and Curcumae Rhizoma produced by different grades of seed rhizoma. Conclusion:The grading standard of seed rhizoma was established based on the systematic study on the classification method of <italic>C. phaeocaulis</italic> seed rhizoma. According to the field experiment， grading planting of seed rhizoma can promote plant growth and development，increase the yield of medicinal materials，and improve the proportion of first-grade medicinal materials， with no impact on the internal quality of medicinal materials. Therefore， classification of <italic>C. phaeocaulis</italic> seed rhizoma is scientific and necessary，and can lay the foundation for the standardized cultivation of <italic>C. phaeocaulis</italic>.