Yield， Quality， and Soil Microecology of Panax ginseng Under Different Forests / 中国实验方剂学杂志

ABSTRACT

ObjectiveTo explore the forest type and soil environment suitable for Panax ginseng. MethodThe yield， quality， soil chemical properties， soil enzyme activity， and soil microbial metabolism of 9-year-old P. ginseng under different forests were investigated. ResultThe quality of P. ginseng was significantly different among forest types. To be specific， P. ginseng under the Quercus mongolica forest had the highest quality， with the total saponin content of 2.27% which was 51.89% higher than that in P. ginseng under Larix gmelinii forest. The yield of P. ginseng under Q. mongolica forest and L. gmelinii forest （30 g·m-2） was the highest， 62.5% higher than that under Betula platyphylla forest. The soil content of organic matter， Cu， and Zn， and activity of sucrase and urease under Q. mongolica forest were lower than those under other forest types. The utilization rate of D-galacturonic acid by soil microorganisms under Q. mongolica forest was higher than that under other forest types， but the utilization rate of L-phenylalanine was lower than that under other forest types. The utilization rate of 2-hydroxybenzoic acid by soil microorganisms of B. platyphylla forest was significantly lower than that under other forest types. There was a negative correlation between soil Zn and ginsenoside Rb1 and Rc， and between soil K and ginsenoside Rb2 and Rb3. Mn and Cu were positively correlated with most saponins. The results of redundancy analysis showed that the soil microorganisms using carbon sources of amino acids， esters， acids， and sugars were the main factors causing the differences in P. ginseng among different forest types. ConclusionThe yield and quality of P. ginseng under Q. mongolica forest were the best， followed by the forest with different tree species， and coming in last was the B. platyphylla forest. This study is expected to provide theoretical support for the improvement of P. ginseng yield and quality and the improvement of ecological planting technology.