RESUMO
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>.
RESUMO
The systematic breeding method was adopted to breed a new good cultivar of Curcuma longa, named "Chuanjianghuang 1". From 2014 to 2015, two consecutive years of multi-point test were carried out in Shuangliu, Chongzhou and Wenjiang. The biological characters, phenology, agronomic characters, yield and quality indexes of "Chuanjianghuang 1" were comprehensively evaluated. The results showed that compared with local traditional species, the rhizome yield of the new cultivar "Chuanjianghuang 1" increased by 20.61%.The average content of volatile oil was higher than 24.17% and the average content of curcumin in root tuber was higher than 26.62%. The yield of root tuber increased by 54.59%.The average content of volatile oil is higher than 36.28% and the average content of curcuminoids is higher than 25.31%. Compared with "Huangsi Yujin 1", "Chuanjianghuang 1" increased the average yield of rhizome by 123.68%,the volatile oil increased by an average of 7.69%and the curcumin content increased by an average of 58.23%. The average content of volatile oil is higher than 52.82% and the average content of curcuminoids in root tuber was higher than 38.34%. The new variety "Chuanjianghuang 1" has better yield than the local traditional species, and the internal quality of rhizome and root tuber is better. Compared with "Huangsi Yujin 1", the yield of rhizome is significantly increased, and the internal quality of rhizome and root tuber is better, especially the content of curcumin in rhizome and curcuminoids in root tuber is significantly higher than that of "Huangsi Yujin 1". "Chuanjianghuang 1" is high yield, good quality, good stability and strong adaptability, which is suitable for cultivation and promotion in Chengdu Jinma River Basin, such as Shuangliu, Chongzhou, Wenjiang.