Effects of biochar application on nitrogen transformation and NO emission in a coastal saline-alkali soil.

The application of biochar can improve soil fertility and benefit sustainable agricultural development and carbon neutrality simultaneously. To better understand the effects of biochar addition on nitrogen transformation and NO emission in a coastal saline-alkali soil and its potential mechanisms, we conducted a 60-day laboratory incubation experiment with six treatments, ., ammonium sulfate (N 150 mg·kg), ammonium sulfate + 0.

[Elevational Distribution Characteristics of Soil Bacterial Community and Enzyme Activities in Mount Huangshan].

Mount Huangshan has a well-preserved ecosystem and obvious differences in vertical geography, which provide a natural laboratory for studying the altitudinal distribution patterns of soil microbial communities in a mid-subtropical forest ecosystem. The soil bacterial community structure and diversity of the samples collected every 100 m from 670 to 1870 m on the south slope of Mount Huangshan were examined using Illumina MiSeq high-throughput sequencing technology. The soil physicochemical properties and soil enzyme activities of the samples were also measured to explore the relationship between bacterial communities and soil properties as well as enzyme activities.

[Effect of nonionic surfactant Tween80 and DOM on the behaviors of desorption of phenanthrene and pyrene in soil-water systems].

Batch experiments were conducted to study the effects of dissolved organic matter (DOM) and nonionic surfactant (Tween80) on the desorption of phenanthrene and pyrene in soil-water systems. The results showed that DOM derived from pig manure and pig manure compost increased the desorption of phenanthrene and pyrene in soil-water systems, and the effect of pig manure compost DOM was better than that of pig manure DOM; with the increase of Tween80, the desorption rate of phenanthrene and pyrene also increased compared with the control, especially at high concentration of Tween80 (150 mg x L(-)). And at this concentration, the desorption rates were increased by 1.

[Vertical fractionation of dissolved organic matter and its effect on the transport of Cu in Cu-contaminated soils].

The vertical fractionation of DOM and its effect on Cu transport in acidic and calcareous Cu-contaminated soils were studied in column experiments. The results showed that the polarities of DOM derived from green manure and pig manure were obviously decreased by 11.4% and 10.

[Adsorption of dissolved organic matter in soil and dissolved organic matter effect on the copper precipitation in high pH range].

Batch experiments were performed to study the dissolved organic matter (DOM) derived from green manure and pig manure sorption in acidic and calcareous soils and the effect of DOM derived from green manure and pig manure compost on the precipitation of copper at different pH in solution. The results showed that there was a significant net release of dissolved organic carbon (DOC) in soil (33.58 mg x L(-1) for calcareous soil and 17.