土壤容重对活血丹生长、生理及药材品质的影响

Effects of soil bulk density on growth, physiology and quality of Glechoma longituba

通过对活血丹生长、生理及活性成分的测定,探究土壤容重对活血丹生长与品质的影响。采用盆栽试验,设置了0.8,0.9,1.0,1.1,1.2,1.3 g·cm^-3 6个不同容重处理,测定活血丹的生长指标、生理指标及其活性成分的含量。结果表明:活血丹各生长指标和生物量均随着土壤容重的增加呈先增加后减少的趋势,活血丹干重在1.0 g·cm^-3处理达到最大值5.70 g;光合色素、可溶性糖及游离氨基酸随着土壤容重的增加先增加后减少,适宜的土壤容重有利于光合色素的积累、可溶性蛋白和游离氨基酸的合成,丙二醛含量随着土壤容重的增加逐渐升高;活血丹药材醇溶性浸出物均达到药典规定不低于25%的标准,在1.0 g·cm^-3处理达到最大值40.66%,总黄酮含量随着土壤容重的增加逐渐增加,三萜酸和酚酸类物质随着土壤容重的增加逐渐减少。土壤容重对活血丹生长和品质有显著的影响,1.0 g·cm^-3容重处理有利于活血丹的生长和品质形成。

Through the determination of the growth, physiological and active components of Glechoma longituba, the effect of soil bulk density on growth and quality of G. longituba was explored. Through pot experiment, six different bulk density treatments were set for 0.8, 0.9, 1.0, 1.1, 1.2, 1.3 g·cm^-3, the growth index, physiological index and the content of active components were determined. The results showed that the growth indexes and biomass of G. longituba firstly increased and then decreased with the increase of soil bulk density. The dry weight of G. longituba achieved the maximum 5.70 g in the treatment of 1.0 g·cm^-3. The photosynthetic pigments, soluble sugars and free amino acids firstly increased and then decreased with the increase of soil bulk density. The suitable soil bulk density was beneficial to the accumulation of photosynthetic pigment, soluble protein and free amino acid synthesis. The content of malondialdehyde increased gradually with the increase of soil bulk density. The contents of ethanol-soluble extractives of G. longituba were greater than 25%, meeting its quality criterionin Chinese Pharmacopoeia 2015, achieved the maximum of 40.66% in the treatment of 1.0 g·cm-3. The total flavonoids content of G. longituba increased gradually with the increase of soil bulk density, triterpenic acid and phenolic acids decreased gradually with the increase of soil bulk density. Soil bulk density has a significant effect on the growth and quality of G. longituba, and it is conducive to the growth and its medicinal quality at the soil bulk density of 1.0 g·cm^-3.