Learn More
To date, occurrence and stimulation of different nitrification pathways in acidic soils remains unclear. Laboratory incubation experiments, using the acetylene inhibition and 15N tracing methods, were conducted to study the relative importance of heterotrophic and autotrophic nitrification in two acid soils (arable (AR) and coniferous forest) in subtropical(More)
An in situ 15N tracing study was conducted to investigate the characteristics of soil mineral nitrogen (N) production and conservation in acid forest soils of subtropical China. The six experimental soils were strongly acidic (pH ranged from 4.1 to 4.7), except for one soil, from an orange orchard which had a higher pH (5.7) due to lime application. Total(More)
Amending vegetable soils with organic materials is increasingly recommended as an agroecosystems management option to improve soil quality. However, the amounts of NO, N2O, and N2 emissions from vegetable soils treated with organic materials and frequent irrigation are not known. In laboratory-based experiments, soil from a NO 3 − -rich (340 mg N kg−1)(More)
The potential denitrification (PD) rate, NO, N2O, and N2 emission were determined after treatment with 50 mg NO3 −−N kg−1 soil using the acetylene inhibition method, and meanwhile abundance of four denitrifying genes (i.e., narG, nirK, norB, nosZ) was also investigated in subtropical soils of China. Soil samples were collected from conifer forest (C), shrub(More)
Biological soil disinfestation (BSD) is an effective and environmentally friendly way to suppress soil-borne pathogens. Although it is increasingly used in USA, the Netherlands and Japan, its precise mechanism has not been well quantified so far. Quantitative real-time PCR, denaturing gradient gel electrophoresis and high performance liquid chromatography(More)
Continuous vegetable cultivation in greenhouses can easily induce soil degradation, which considerably affects the development of sustainable vegetable production. Recently, the reductive soil disinfestation (RSD) is widely used as an alternative to chemical soil disinfestations to improve degraded greenhouse vegetable soils. Considering the importance of(More)
In China, atmospheric deposition of NO3 − is increasing rapidly. However, information on how microbial N cycling in forest soils may respond to increasing deposition of NO3 − is currently lacking. Determination of process- and pool-specific N transformation rates can provide additional insights into the controls on the production and consumption of(More)
In order to ensure the safe operation of power systems, human pay attention to the diagnosis of heat fault of power system widely. When high-voltage bus bar runs overlade or the contactors of high voltage switches contact badly, the contact resistances will become larger, and it would glow if there is load current. Moreover, the phenomenon will cause(More)
For understanding the effects of nitrification ability on nitrogen (N) use efficiency and N losses via denitrification in paddy soils under flooding conditions, six paddy soils with different nitrification activities were sampled from various sites of China and a pot experiment was conducted. Rice plants at tillering stage were transplanted into pots and(More)
Long-term application of pig manure can improve soil fertility and alleviate soil acidification, but also increase nitrogen (N) losses in subtropical upland red soils. However, mechanisms driving N losses via nitrate leaching or N2O emissions remain unknown. Herein we investigated long-term pig manure applications in upland red soils by assessing soil N(More)