Exploring the nitrogen fixing strategy of bacterial communities in nitrogen cycling by adding calcium superphosphate at various periods during composting.

Chicken manure, as an organic solid waste with a high nitrogen content, generates large amounts of ammonia during composting, which leads to pollution of the surrounding environment, and causes a reduction in the quality of the compost product. Nitrogen is transformed through the nitrogen cycle and bacterial communities are the main contributors to the transformation of the nitrogen cycle. The microbial composition changes dramatically at different stages during composting.

Deciphering the turnover of bacterial groups in winter agricultural soils.

In winter, snowpack is an important driver of soil bacterial processes. Amending soil through the addition of organic compost has also been reported to affect soil properties and bacterial communities. However, the effects of snow and organic compost on soils have not been systematically researched and compared.

Differences in organic nitrogen transformation during chicken manure composting with the addition of different disaccharides.

The effect of different carbon sources on nitrogen (N) transformation and N loss through nitrogenous gas volatilization during composting of manure is not clear. Disaccharides had moderate degradation stability compared to monosaccharides and polysaccharides. Therefore, we investigated the effect of adding sucrose (nonreducing sugar) and maltose (reducing sugar) as carbon sources on volatile N loss and hydrolysable organic nitrogen (HON) transformation.

Lignite drove phenol precursors to participate in the formation of humic acid during chicken manure composting.

This study set out to explore the impact of lignite on preserving organic matter and promoting the formation of humic acid (HA) during chicken manure composting. Composting test was carried out for control (CK), 5 % lignite addition treatment (L1), 10 % addition treatment (L2) and 15 % addition treatment (L3). The results demonstrated that lignite addition effectively reduced the loss of organic matter.

The effect of calcium superphosphate addition in different stages on the nitrogen fixation and ammonification during chicken manure composting.

Nitrogen losses through ammonia (NH) emission were an unavoidable issue during chicken manure composting. Calcium superphosphate can be added to effectively limit the emission of NH. The results show that adding calcium superphosphate in the heating, high temperature and cooling stages reduces ammonia emission by 18.

Characteristics of oxytetracycline stress-sensitive microbe-dissolved organic matter component interactions during composting.

Dissolved organic matter (DOM) has important impacts on the transportation of antibiotics through chemical and biological processes in composting. The interaction between DOM and antibiotics is reciprocal. The interaction between DOM ligands and antibiotics could be characterized based on a technique combining parallel factor analysis (PARAFAC) and microbial community structure analysis.

Ammonium stress promotes the conversion to organic nitrogen and reduces nitrogen loss based on restructuring of bacterial communities during sludge composting.

This study aimed to clarify the conversion relationship between organic and inorganic nitrogen. The NHCl was used to enhance the inorganic nitrogen content. The key role of bacterial conversion of ammonium to organic nitrogen under ammonium stress was explored.

Influence of malonic acid and manganese dioxide on humic substance formation and inhibition of CO release during composting.

The aim of thisstudy was to explore the effects of malonic acid (MA), manganese dioxide (MnO), malonic acid combined with manganese dioxide (MA + MnO) additionon reducing CO emission and promoting humic substance (HS) formation during composting. The result showed that the addition of MA and MnO were an efficient way to reduce CO emission. Meanwhile, the CO emissions in the MA + MnO treatment was 36.

A pediatric case report and literature review of thelaziosis in China.

Thelaziosis is a zoonosis with regional epidemics, mainly present in oriental countries, with a majority of cases reported from China. We report a pediatric case of thelaziosis and present a literature review of Chinese case reports. The epidemiological features and clinical characteristics of thelaziosis in China are presented.