| Abstract: In order to develop a new method of floating seedling of Jerusalem artichoke tuber matrix with environmental protection, energy saving and low cost, find the main factors and index for breeding, the floating seedling of Jerusalem artichoke tuber was raised with sawdust, perlite, fungus residue and grain husk as floating seedling matrix. The results showed that formula 2 had significant effects on plant height, leaf width, stem diameter, leaf number and fresh weight of Jerusalem artichoke. The number of the root and the width of the leaves were the key factors affectingthe Jerusalem artichoke growth. And the contention of the calcium and iron had significant relationship with the root number and leaf width. The Jerusalem artichoke roots number increased by 19.450 with the calcium contention increased by 1%. And the root number decreased by 20.202 with iron contention increased by 1%. Regression analysis showed that the optimum contention of potassium and iron were 0.288 0% and 1.311 8% respectively. |