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Soil organic matter (SOM) for topsoil is one of most important indicators to support the success of mine ecological reclamation. SOM varies along the artificial mine landscape characterized by different bench-slopes of dump. Reflectance using field spectroscopy can provide useful information on the assessment of punctual soil variation, and has the advantages of speed and efficiency. The aims of this...
Data related to the spatial variability of properties of paddy soil is critical for improving rice productivity and designing sustainable farming techniques. However, a systematic assessment focusing on the spatial variability of low-yield paddy soil has not been conducted in South China. In this context, 560 soil samples were collected across South China and analyzed for nine common chemical properties...
The influence of inorganic or organic fertilization on soil microbial ecology has been emphasized recently, but less is known about rhizosphere effects on extracellular enzyme activities and microbial community structure. Eleven extracellular enzymes involved in C, N, P, and S cycling and microbial community structure in both the rhizosphere and bulk soil samples from a long-term (31-year) fertilizer...
Goethite (Gt) is an important iron mineral in soils and sediments. Conventional measurements cannot effectively identify it at the low concentrations typical of soils and sediments. In this paper we demonstrate that diffuse reflectance spectroscopy (DRS) in conjunction with thermal treatment provides a definitive technique for identifying Gt in soil and sediments. The DRS pattern of Gt exhibits diagnostic...
The extractability, bioavailability and toxicity of metals in soils decline with time owing to aging processes. The processes have important impact on the ecological risk assessment of metals in soils. In this study, a sequential extraction procedure was used to investigate the aging processes of copper added to bentonite and the effects of temperature and pH on the aging processes; X-ray diffraction...
Sulfur transformation and its availability to plants in two flooded paddy soils, derived from Black soil in Heilongjiang (soil 1) and from Red earth in Jiangxi (soil 2), were investigated in a closed incubation system using carrier-free 35 S–SO 42− and 35 S-labeled rice straw. After incubation for 120 days, 51.1% and 60.3% of the 35 S added in the Na 2 ...
In order to identify sulfur supplying potential in paddy soils, an open incubation technique was used to measure sulfur mineralization in four paddy soils under flooded conditions. An exponential equation and a reciprocal plot technique were used to model the sulfur mineralization patterns, and a soil exhaustion experiment with rice (Oryza sativa L.) was conducted to investigate the availability of...
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