| Yield and medicinal ingredients of G. macrophylla Pall. response to N, P and K fertilization |
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| DOI：10.7606/j.issn.1000-7601.2023.01.06 |
| Key Words: G. macrophylla Pall. yield gentiopicroside loganinic acid optimal fertilization model |
| Author Name | Affiliation | | SHENG Yuzhang | Institute of Soil and Water Conservation, Northwest A＆F University, Yangling, Shaanxi 712100, China
Central Southern China Electric Power Design Institute, Wuhan, Hubei 430071, China | | LUO Han | Institute of Soil and Water Conservation, Northwest A＆F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | XIE Yongsheng | .Institute of Soil and Water Conservation, Northwest A＆F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
Institute of Shaanxi Hantang Agricultural Standardization, Xi’an, Shaanxi 710000, China | | WANG Weiling | College of Chemistry and Pharmacy, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Zhen | Institute of Soil and Water Conservation, Northwest A＆F University, Yangling, Shaanxi 712100, China | | CHEN Dongkai | Institute of Soil and Water Conservation, Northwest A＆F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| To determine the optimal fertilization plan for G. macrophylla Pall. (Qinjiao) cultivation and the effects of various concentrations of N, P and K on the production of gentiopicrosideandloganinic acid in G. macrophylla Pall., a field experiment was conducted in the Baoji area. With a three\|factor and quadratic saturation D-optimal design, the experiment was conducted to build a mathematical model with N, P and K fertilizer concentrations as independent variables and the yield of G. macrophylla Pall., along with the contents of gentiopicroside and loganinic acidas dependent variables. The model was developed to enable the optimal fertilization pattern to be determined. Analysis promoted an increase in production and accumulation of gentiopicroside and loganinic acid. According to the single factor effect analysis on N, P and K, the application of N and P with appropriate amount can increase the yield and the contents of gentiopicroside and loganinic acid, but it will be inhibited when the amount is too high. The effect is the same as K, but the application of K is not conducive to the accumulation of gentiopicroside. The effects of N, P and K on the yield and gentiopicroside and loganinic acid contents were ranked as follows: P>N>K. The frequency analysis method for optimizing each function indicated that the required fertilization pattern for a yield of >2 100.0 kg·hm-2, the contents of gentiopicroside of >7.5% and the contents of loganinic acid of >2.0% was 147.2~185.1 kg·hm-2 of N, 92.6~98.9 kg·hm-2 of P(P2O5) and 95.8~134.2 kg·hm-2 of K (K2O). To ensure the greatest licorice yield and highest contents of gentiopicroside and loganinic acid, the optimal ratio of N, P2O5 and K2O was 1∶1.49~2.00∶1.10~1.93. |
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