Zhang Jiguang, Fan Sanhong, Qin Jun, Dai Jichen, Zhao Fangjie, Gao Liqiang, Lian Xihong, Shang Wenjing, Xu Xiangming, Hu Xiaoping
State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, China.
College of Life Science, Northwest A&F University, Yangling, China.
Front Plant Sci. 2020 Dec 7;11:572199. doi: 10.3389/fpls.2020.572199. eCollection 2020.
American ginseng is an important herbal medicinal crop in China. In recent years, there has been an increasing market demand for ginseng, but the production area has been shrinking due to problems associated with continuous monocropping. We analyzed the microbiome in bulk soils to assess whether and, if so, what changes in the bulk soil microbiome are associated with continuous American ginseng cropping. The alpha diversity of fungi and bacteria was significantly lower in the soils planted with American ginseng than the virgin (non-planted) land. The relative abundance of spp. and spp., known plant root pathogens, was much higher in the soils cropped with American ginseng than the non-planted. On the other hand, a number of bacteria with biodegradation function, such as spp., spp., spp., and spp., had lower abundance in the soils cropped with American ginseng than the non-cropped. In addition, soil pH was lower in the field planted with American ginseng than the non-planted. Accumulation of fungal root pathogens and reduction of soil pH may, therefore, have contributed to the problems associated with continuous monocropping of American ginseng.
西洋参是中国一种重要的药用草本作物。近年来，人参的市场需求不断增加，但由于连作问题，其种植面积一直在萎缩。我们分析了大田土壤中的微生物群落，以评估大田土壤微生物群落是否以及（如果是）与西洋参连作相关的哪些变化。种植西洋参的土壤中真菌和细菌的α多样性显著低于原始（未种植）土地。已知的植物根系病原菌 spp. 和 spp. 在种植西洋参的土壤中的相对丰度比未种植的土壤高得多。另一方面，一些具有生物降解功能的细菌，如 spp.、spp.、spp. 和 spp.，在种植西洋参的土壤中的丰度低于未种植的土壤。此外，种植西洋参的田地土壤pH值低于未种植的田地。因此，真菌根系病原菌的积累和土壤pH值的降低可能导致了西洋参连作相关的问题。
