Studies On Effects Of Fertilization On Plant Growth And Nutrition Composition Of Urtica Dioica

Stinging nettle (Urtica dioica )is a perennial plant. People have been studying its medical value for many years, but with very few studies on its resource and cultivation measures, which makes it difficult to establish the fertilizer amount. The systematic studies on nutrition management in Stinging nettle cultivation can establish scientific and reasonable cultivating measures, improve the yield and quality of Stinging nettle medicinal materials and protect wild resources. At the same time, the achievement can provide scientific foundation for standardization cultivation of Stinging nettle. Therefore, on the basis of field investigation, pot experiments and chemical analyses in the laboratory were carried out with the following results and conclusions:Stinging nettle contains a high proportion of flavonoids, organic acid, plant sterols, plant protein as a small-molecular-weight lectin (Urtica dioica agglutinin) and amylose. It exhibits antiviral activity. Extracts from the root of stinging nettle are approved for the treatment of Benign Prostatic Hypertrophy and can inhibit a range of viruses including those responsible for HIV, colds, and influenza and inhibit blood sugar. In addition, it is capable favorably inducing a balanced immune response and has hairdressing and health protection activity.Results from pot fertilization experiments show that 1) For the best development indicators, the optimum fertilizer dose was 0.12g/kgsoil carbamide, 0.06g/kgsoil calcium phosphate, 0.20g/kgsoil potassium sulfate, and 0.009mg/kgsoil manganese sulfate-boron sulfate, respectively; 2)For the maximal ash contents in leaves, the optimum fertilizer dose was 0.12g/kgsoil carbamide, 0.03g/kgsoil calcium phosphate, 0.02g/kgsoil potassium sulfate, and 0.068mg/kgsoil manganese sulfate-boron sulfate, respectively; 3) For the maximal crude protein content in leaves, the optimum fertilizer dose was 0.48g/kgsoil carbamide, 0.03g/kgsoil calcium phosphate, 0.05g/kgsoil potassium sulfate, and 0.034mg/kgsoil manganese sulfate-boron sulfate, respectively; 4) No significant differences of crude fat and micronutrients were found between different fertilization levels; 5)For the maximal soluble sugar content, the optimum fertilizer dose was 0.24g/kgsoil carbamide, 0.06g/kgsoil calcium phosphate, 0.05g/kgsoil potassium sulfate, and 0.034mg/kgsoil manganese sulfate-boron sulfate, respectively; 6) For the integral balance of N, P and K in leaves, the optimum fertilizer dose was 0.48g/kgsoil carbamide, 0.06g/kgsoil calcium phosphate, 0.20g/kgsoil potassium sulfate, and 0.034mg/kgsoil manganese sulfate-boron sulfate, respectively; 7)For the maximal percentage of essential amino acids to total amino acids, reasonable fertilizer dose was 0.12g/kgsoil carbamide,...