In order to explore the effects of different basal fertilizer treatments on the quality and yield of Astragalus membranaceus under continuous cropping conditions, in this study, Astragalus membranaceus in Mongolia was taken as the test material, and the soil where Astragalus was planted in previous stubble was used as the experimental demonstration site, and the effects of different basal fertilizer treatments on the yield and quality of Astragalus membranaceus were carried out in three locations in Guyang county, Inner Mongolia, and conventional fertilization control group(diammonium phosphate + potassium sulfate, CK) and experimental demonstration fertilization experimental group(diammonium phosphate + potassium sulfate and organic fertilizer + compound microbial fertilizer, DT) treatments were designed to observe and analyze the appearance of Astragalus membranaceus, root rot incidence, quality, and yield, and the cost and benefit of fertilizers were calculated. The results showed that compared with the control group, the root length of Astragalus membranaceus in the experimental group increased by 13.58%, 31.62%, and 11.19%, respectively, and the root thickness increased by 26.73%, 36.89%, and 13.30%, respectively. The root rot incidences of Astragalusmembranaceus decreased by 38.90%, 63.61%, and 66.67%, respectively. In terms of the quality of Astragalus membranaceus, the content of calycosin isoflavone glucoside increased by 60.38%, 41.94%, and 127.27%, respectively, and the content of astragaloside IV increased by 30.63%, 84.30%, and 39.53%, respectively. The experimental demonstration treatment had a significant effect on increasing the yield of Astragalus membranaceus, and the yield increased by 21.38%, 24.52%, and 19.55%, respectively. The results of economic benefit analysis showed that the total output value and net profit value of the experimental group were significantly higher than those of the control group. In conclusion, in the second year of continuous cropping planting of Astragalus, the treatment of basal fertilizer application of organic fertilizer + compound microbial fertilizer could significantly promote the root growth of Astragalus membranaceus, reduce the root rot incidence, improve the quality and yield, and improve the economic benefits of planting, which could effectively alleviate the impact of continuous cropping obstacles on the yield and quality of continuous cropping planting of Astragalus membranaceus.
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