NOVELTY - The Astragalus sinicus fertilizer comprises 120-200 parts by weight (pbw) of urea encapsulated nitragin composition, 144-155 pbw of 5% humic acid encapsulated urea, 310-330 pbw of diammonium phosphate, 235-245 pbw of potassium chloride, 78-82 pbw of calcium nitrate and 58-62 pbw of magnesium sulfate. The fertilizer is prepared by liquidically fermenting a root nodule bacteria fermentation liquid of Astragalus sinicus with turf soil and adsorbing with the sterilized turf soil to obtain the solid nitragin.    USE - Used as Astragalus sinicus fertilizer. No biological data given.    ADVANTAGE - The fertilizer: reduces field-runoff loss; reduces field nitrogen, phosphorus transfer loss; and improves field comprehensive benefit, hence cost-effective.    DETAILED DESCRIPTION - The Astragalus sinicus fertilizer comprises 120-200 parts by weight (pbw) of urea encapsulated nitragin composition, 120-180 pbw of 5% humic acid encapsulated urea, 280-350 pbw of diammonium phosphate, 200-280 pbw of potassium chloride, 50-100 pbw of calcium nitrate and 50-90 pbw of magnesium sulfate. The fertilizer is prepared by liquidically fermenting a root nodule bacteria fermentation liquid of Astragalus sinicus with turf soil, adsorbing with the sterilized turf soil to obtain the solid nitragin, where a mass ratio of the fermentation liquid to the turf soil is 1/(3-4), adding the ammonium molybdate in 1.5-2.5 wt.% of the solid nitragin, uniformly mixing them and pelleting at 40-50 degrees C to obtain the molybdenum doped nitragin particles and spraying the fused urea on the surfaces of the particles to form a urea encapsulated layer to further obtain the urea encapsulated nitragin composition, where the ratio of the urea encapsulated layer to the root nodule bacteria particles is 6-9 wt.%, 5% humic acid encapsulated urea is prepared by using the particle urea as the core fertilizer, spraying a layer of adhesive outside the core fertilizer, spraying a layer of air-dried and ground coal and repeating the process after the materials are cured till the adhesive is in 1% of the mass of the core fertilizer and the air dried coal is in 5% of the mass of the core fertilizer. An INDEPENDENT CLAIM is included for preparing Astragalus sinicus fertilizer.