Humans have relied on nature throughout their ages to cater for their basic needs including medicines to cure a wide spectrum of diseases. So, it seems necessary to increase the phytochemical compounds of medicinal plants by using effective strategies. In this research, effect of different particle sizes of perlite (very coarse perlite (more than 2 mm), medium perlite (1−1.5 mm), and very fine perlite (less than 0.5 mm)) and its mixture with peat moss (at 50:50 v/v and 30:70 v/v peat moss to perlite ratios) at two NO₃⁻/NH₄⁺ ratios (90:10 and 70:30) were investigated for hydroponic Echinacea purpurea medicinal plant production in greenhouse conditions. According to results, different sizes of perlite and various NO₃⁻/NH₄⁺ ratios had significant effects on plant growth parameters including the plant height, total fresh leave weight, fresh root weight, total biomass, total chlorophyll, and leaf area; meanwhile, phytochemical properties including total phenolic and flavonoid content, and various anti-radicals scavenging activities of E. purpurea were significantly varied for various growing media. The medium containing very fine-grade perlite with 50:50 v/v perlite to peat moss ratio had the optimum performance for E. purpurea plant growth parameters and phytochemical properties. It has been found that an increase of NO₃^-/NH₄⁺ ratio caused a significant increase in plant growth parameters and the phytochemical properties of E. purpurea.

人类自古以来就依靠自然来满足其基本需求，包括治疗多种疾病的药物。因此，似乎有必要通过采用有效的策略来增加药用植物的植物化学成分。在这项研究中，不同粒径的珍珠岩（非常粗的珍珠岩（大于2毫米），中等珍珠岩（1-1.5毫米）和非常细的珍珠岩（小于0.5毫米））及其与泥炭藓的混合物（在在两个NO 50:50 v / v和30:70 v / v泥炭苔珍珠岩比）₃ ^- / NH _4分⁺比（90:10和70:30）进行了调查水耕紫锥菊药用植物生产温室条件。根据结果​​，不同尺寸的珍珠岩和各种NO ₃^- / NH ₄ ⁺比率对植物生长参数具有重要影响，包括植物高度，总鲜叶重，鲜根重，总生物量，总叶绿素和叶面积；同时，紫花大肠埃希菌的总酚和类黄酮含量及其植物的理化特性在各种生长培养基上均存在显着差异。含有珍珠岩与泥炭苔藓比为50:50 v / v的极细珍珠岩的培养基，对紫癜植物的生长参数和植物化学特性具有最佳性能。已经发现，增加NO的₃ ^- / NH ₄ ⁺该比值引起紫。的植物生长参数和理化性质的显着增加。