[Effect of Biochar on Ammonia Volatilization in Saline-Alkali Soil].

In order to investigate the effect of biochar on NH volatilization in saline-alkali soils of the Yellow River Delta, continuous laboratory incubation was conducted. Firstly, the recovery rate of NH volatilization by an improved aeration method was determined, the effects of fertilizer particles and aqueous fertilizer solution on NH volatilization were then compared. Finally, the effects of biochar species, application amount, and fertilizer type on NH volatilization rate and total amount were explored.

β-cyclodextrin functionalized biochars as novel sorbents for high-performance of Pb removal.

The aim of this study was to synthesize the functionalized biochars with β-cyclodextrin (β-CD), compare the two kinds of adsorption capability, and try to explore the possible mechanism for the adsorption Pb by β-CD functionalized rice straw and palm biochars in the aquatic environment. The performance of the functionalized biochars was matched against the activated and raw biochars. Rice straw biochar loaded with β-CD performed better than functionalized palm biochar with the adsorption capabilities of 130.

[Effects of elevated ozone concentrations on enzyme activities and organic acids content in wheat rhizospheric soil.].

The elevated concentration of tropospheric ozone (O) is an important global climate change driver, with adverse impacts on soil ecological environment and crop growth. In this study, a pot experiment was carried out in an open top chamber (OTC), to investigate the effects of elevated ozone concentration on soil enzyme activities (catalase, polyphenol oxidase, dehydrogenase and invertase), organic acids contents (oxalic acid, citric acid and malic acid) at different growth stages (tillering, jointing, heading and ripening stages) of wheat, and combined with the rhizospheric soil physicochemical properties and plant root characteristics to analyze the underlying reasons. The results showed that, elevated ozone concentration increased soil catalase, polyphenol oxidase, dehydrogenase and invertase activities at wheat ripening period to different degrees, with the effects on the activities of catalase and polyphenol oxidase being statistically significant.