1. This paper deals with the dynamics of trifluralin degradation and its main affected factors in soils under field and pot experimental conditions.

2. The advantage of trifluralin application was its low cost and high efficiency.

3. The synthetic result of this study indicated that Harness was the primary preemergence herbicide for the spore stroma of Osmunda japonica Thunb propagation, and trifluralin was secondary.

4. The result indicated that, alfalfa seedlings grew well, the weed control efficiency of trifluralin reached above 90%.

5. The photoquenching efficiency was positively related to the dosage of parathion-methyl, trifluralin, glyphosate and bensulfuron-methyl.

6. The invention discloses a herbicide prepared by binary compounding of oxyfluorfen and trifluralin and a preparation method thereof.