Qiu Xiuwen

Bio: Qiu Xiuwen is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Chicken manure & Compost. The author has an hindex of 2, co-authored 10 publications receiving 12 citations.

Automatic composting machine

Abstract: The utility model belongs to the technical field of fertilizer fermenting installation, a automatic composting machine is related to, include the fermentation chamber and the secondary fermentation room of separating through the expansion plate, the top outside of a fermentation chamber is equipped with the feed inlet, and the top inboard of a fermentation chamber is equipped with sprinkler, and the inside of a fermentation chamber is equipped with horizontal agitating unit, and the outside of a fermentation chamber is equipped with aeration equipment, and the lateral wall lower extreme of secondary fermentation room is equipped with the discharge gate. Wherein the expansion plate includes first expansion plate and second expansion plate, and the both sides of first expansion plate and second expansion plate are equipped with assorted direction slotted guide track respectively, and the side of second expansion plate is equipped with the handle, the installation of handle perpendicularto direction slotted guide track, and the guide way that supplies the handle push -and -pull is seted up to direction slotted guide track's both sides on the first expansion plate. The utility model discloses the air that makes the heating improves oxygen utilization ratio inside directly getting into the compost greatly, and messenger's compost heat more evenly permeates, shortens the compost time greatly, effectively improves the quality of compost.

Soil sample collection and storage box

Abstract: The utility model discloses a soil sample collection and storage box belongs to soil sample storage device material technical field. In can solving prior art, when the pedotheque divided different sampling points and divides different soil layers to deposit, arrangement difficulty, the problem that wastes time and energy were seeked to the sample. This soil sample collection and storage box includes a plurality of sample collection devices, and a plurality of the sample collection device is parallel in proper order, and per two can dismantle the connection between the sample collection device, the sample collection device includes first cylindrical shell, container and annular label bar, and is a plurality of the container embedded on the cylindrical shell, and it is a plurality of the container is parallel to be set up, annular label bar is around a plurality of the container sets up, annular label bar supports through at least two bracing pieces on the cylindrical shell, label bar includes a plurality of label area, and the label is inserted and is established in the label area, a plurality of label area's position is with a plurality of the position one -to -one of container, be provided with on the container and connect the lid.

Microbial community succession in soils under long-term heavy metal stress from community diversity-structure to KEGG function pathways.

Abstract: Currently, understanding the structure and function of the microbial community is the key step in artificially constructing microbial communities to control soil heavy metal pollution. Abundant/rare microbial communities play different roles in different levels of concentrations. However, the correlation between heavy metals and rare/abundant subgroups is poorly understood. In this study, we used a metagenomics approach to comprehensively investigate the evolutionary changes in microbial diversity, structure, and function under different heavy metal concentration stress in soils surrounding gold tailings. The results show that the main pollutants were Pb, As, and Zn. Indigenous microorganisms have different responses to heavy metal concentrations. Bacteria are the main components of indigenous microorganisms, mainly including Actinobacteria, Proteobacteria, Chloroflexi, and Acidobacteria. With the increase of heavy metal pollution, the relative abundance of Proteobacteria increased, and that of Actinobacteria decreased. Archaea was significantly inhibited by heavy metal stress and was more sensitive to heavy metal concentration. The response of fungi to heavy metal concentration was not obvious. The results of KEGG pathways showed that carbon fixation was inhibited with increasing heavy metal concentrations, while nitrogen metabolism was in contrast. Abundant subcommunity had a greater correlation mainly with metal resistance mechanisms, and rare subcommunity plays a key role for soil nutrient cycling such as N, S cycling in soils contaminated. Overall, this study provides a comprehensive analysis of the effects of heavy metal stress at different concentrations on microorganisms in farmland around gold tailings and reveals the relationship between heavy metals on KEGG pathways.