Showing papers by "Min Xu published in 2018"
TL;DR: How long-term common soil management practices affect the abundance and type of ARGs and MGEs in two very different soil environments, one aerobic and the other primarily anaerobic is shown.
Abstract: Different fertilization and cropping systems may influence short- and long-term residues of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in soil. Soils from dryland (peanut) and paddy (rice) fields, which originated from the same nonagricultural land (forested), were treated with either chemical fertilizer, composted manure, or no fertilizer for 26 years before sampling, which occurred one year after the last applications. ARGs and MGEs were investigated using highly parallel qPCR and high-throughput sequencing. Six of the 11 antibiotics measured by LC–MS/MS were detected in the manure applied soil, but not in the nonmanured soils, indicating their source was from previous manure applications. Compared to the unfertilized control, manure application did not show a large accumulation of ARGs in either cropping system but there were some minor effects of soil management on indigenous ARGs. Paddy soil showed higher accumulation of these ARGs, which corresponded to higher microbial bi...
71 citations
TL;DR: It was concluded that the hydrological cycle had obviously changed and that more soil water was transferred into the GW since the aquiclude changed due to climate warming, which resulted in increased water storage.
61 citations
TL;DR: It is indicated that the soil acidification and nutrient accumulation under PGVC mainly shifted the changes of soil microbial community structures, which could occur after only 5 years of PGVC.
Abstract: Plastic greenhouse vegetable cultivation (PGVC) has been widely developed around the world and has resulted in great changes in soil properties and potential contamination by phthalate esters (PAEs). Using high-throughput sequencing, this study investigated the succession and potential factors impacting soil microbial community structures over 20 years of PGVC. The results showed that the pH of soils under PGVC were significantly lower, while the nutrient contents of soils were higher, relative to those of open field soil. The residue concentrations of PAEs in soil under PGVC increased with increasing periods of PGVC. The fungal community diversity, rather than the bacterial community diversity, was significantly reduced in soils under PGVC. However, both the soil bacterial and fungal community structures were changed by long-term PGVC. Among the tested soil physicochemical properties, soil pH and clay were the top two factors affecting the soil bacterial community, while pH and phosphorus (P) mainly affe...
28 citations
TL;DR: Further phytochemical investigation of the steaming treated roots of Panax notoginseng (Araliaceae) led to the identification of two new dammarane-type triterpenoid saponins, notoginenoside SP20 and SP21, which showed no in vitro cytotoxicity against five human cancer cell lines.
12 citations