Sugarcane/peanut intercropping is a highly efficient planting pattern in South China. However, the effects of sugarcane/peanut intercropping on soil quality need to be clarified. This study characterized the soil microbial community and the soil quality in sugarcane/peanut intercropping systems by the Illumina MiSeq platform. The results showed that the intercropping sugarcane (IS) system significantly increased the total N (TN), available N (AN), available P (AP), pH value, and acid phosphatase activity (ACP), but it had little effect on the total P (TP), total K (TK), available K (AK), organic matter (OM), urease activity, protease activity, catalase activity, and sucrase activity, compared with those in monocropping sugarcane (MS) and monocropping peanut (MP) systems. Both intercropping peanut (IP) and IS soils contained more bacteria and fungi than soils in the MP and MS fields, and the microbes identified were mainly Chloroflexi and Acidobacteria, respectively. Intercropping significantly increased the number of unique microbes in IS soils (68 genera), compared with the numbers in the IP (14), MS (17), and MP (16) systems. The redundancy analysis revealed that the abundances of culturable Acidobacteriaceae subgroup 1, nonculturable DA111, and culturable Acidobacteria were positively correlated with the measured soil quality in the intercropping system. Furthermore, the sugarcane/peanut intercropping significantly increased the economic benefit by 87.84% and 36.38%, as compared with that of the MP and MS, respectively. These results suggest that peanut and sugarcane intercropping increases the available N and P content by increasing the abundance of rhizospheric microbes, especially Acidobacteriaceae subgroup 1, DA111, and Acidobacteria.

中文翻译：

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甘蔗/花生间作系统改善了土壤质量并增加了有益微生物的丰度

甘蔗/花生间作是华南地区一种高效的种植模式。然而，甘蔗/花生间作对土壤质量的影响需要澄清。本研究通过 Illumina MiSeq 平台表征了甘蔗/花生间作系统中的土壤微生物群落和土壤质量。结果表明，间作甘蔗（IS）系统显着提高了总氮（TN）、速效氮（AN）、速效磷（AP）、pH值和酸性磷酸酶活性（ACP），但对甘蔗的影响不大。总磷（TP）、总钾（TK）、速效钾（AK）、有机质（OM）、尿素酶活性、蛋白酶活性、过氧化氢酶活性和蔗糖酶活性与单作甘蔗（MS）和单作花生相比（ MP) 系统。间作花生 (IP) 和 IS 土壤中的细菌和真菌都比 MP 和 MS 田的土壤含有更多的细菌和真菌，并且鉴定的微生物分别主要是绿屈菌和酸杆菌。与 IP (14)、MS (17) 和 MP (16) 系统中的数量相比，间作显着增加了 IS 土壤（68 个属）中独特微生物的数量。冗余分析表明，可培养酸杆菌科亚群 1、不可培养 DA111 和可培养酸杆菌的丰度与间作系统中测量的土壤质量呈正相关。此外，与MP和MS相比，甘蔗/花生间作的经济效益分别显着提高了87.84%和36.38%。