Abstract:

In order to research the effect of nutrient on the growth of the plant in the fly ash vinegar residue matrix, the author studied the plant N, P and K demand in the seedling stage, which provided the theoretical bases for the nutrient allocation of matrix. This experiment took ornamental plants pansy (Viola tricolor L.) as test materials. Groups were treated with different proportions of N, P, K nutrient solution. By observing the growth status of plants in each group, a comprehensive analysis of fly ash-the physical and chemical properties of vinegar residue matrix, research of survival rate, leaf area, stem diameter, plant height, fresh weight, dry weight, seedling index, water loss status data in the matrix and comparing with the German peat and ordinary soil, determined the nutrients demand of pansy in the matrix. The result showed that the most impact on the growth of pansy was the P nutrient, especially in seedling stage; At the same time the nutrient ratio had the obvious effect, N, P ratio was more important than the N, K ratio, and the nutrient supply depended on the water supply, adjust the water loss curve was the foundation of nutrient supply, therefore, configuration the matrix should be first repair the plant nutrient, then adjusted the matrix to improve the water supply condition. It could finish the process of phytoremediation smoothly.