LAUSR

In order to reveal the interaction effect between Aspergillus niger (A. niger) and Amorpha fruticosa (A. frusticosa), to guide the large-scale production and cultivation of A. fruticose in ecological restoration, and to promote the greening of rock slope and improve the ecological environment, a study on the effect of fermentation broth with different dilutions of A. niger strain XF-1 on soil nutrient elements and the growth of A. fruticosa was conducted by pot experiment in a green house. The results showed that the contents of chlorophyll a, chlorophyll b and total chlorophyll in the leaves of A. fruticosa significantly increased with the 10 dilution. A. niger strain XF-1 fermentation broth, and the plant height, fresh weight and dry weight of A. fruticosa significantly increased. Whether the condition of planting A. fruticosa or not, the contents of available phosphorus, iron, copper, and zinc in soil by watering were higher in A. niger strain XF-1 fermentation broth than that of control (no watering A. niger strain XF-1 fermentation broth), and the contents of the above-mentioned nutrients by watering with the 10 dilution were the highest in soil in A. niger strain XF-1 fermentation broth, which could significantly promote the growth of A. fruticosa. Therefore, A. niger strain XF-1 has a good growth promotion effect on A. fruticosa.