Study on correlation of soil nutrients and content of active constituents in root of Rumex gmelini / 中国中药杂志

<p><b>OBJECTIVE</b>To provide scientific basis for the selection of agrotype and property fertilization for Rumex gmelini cultivated in compliance with good agricultural practice (GAP).</p><p><b>METHOD</b>HPLC method was applied to determinate the content of seven active constituents (resveratrol, polydatin, chrysophanol 1-glucoside, nepodin, emodin, chrysophanol and physcion) of annual R. gmelini. And the correlation between soil nutrients and content of active constituents in the root of R. gmelini were analyzed by stepwise regression analysis.</p><p><b>RESULT</b>Seven regression equation were established. The statistic significance was found in three of them.</p><p><b>CONCLUSION</b>The soil with high total K level is not suitable for R. gmelini cultivation. But the higher available N, available P, available K level of soil is suitable.</p>

Study on the optimal harvesting time of Rumex gmelini by analyzing the contents of principal components / 中国中药杂志

<p><b>OBJECTIVE</b>To establish a method used for optimization of harvesting time and determine the best time for harvesting Rumex gmelini.</p><p><b>METHOD</b>An HPLC method was applied to determinate the contents of seven active constituents(resveratrol, polydatin, chrysophanol 1-glucoside, nepodin, emodin, chrysophanol and physcion)of R. gmelini at different development stage. The result was analyzed by principal component analysis.</p><p><b>RESULT</b>The accumulation of active constituents showed a regular pattern.</p><p><b>CONCLUSION</b>The best harvesting time of R. gmelini is early July.</p>