Publications by authors named "Tian Faxiang"
Landform, soil properties, soil cadmium (Cd) pollution and rainfall are the important factors affecting the spatial variation of rice Cd. In this study, we conducted big data mining and model analysis of 150,000 rice-soil sampling sites to examine the effects by the above four factors on the spatial variation of rice Cd in Hunan Province, China. Specifically, the variable coefficient of rice Cd in space was significantly correlated with the partition scale according to the logistic fitting.
View Article and Find Full Text PDFSoil properties, such as soil pH, soil organic matter (SOM), cation exchange capacity (CEC), are the most important factors affecting cadmium (Cd) accumulation in vegetables. In this study, we conducted big data mining of 31,342 soil and vegetable samples to examine the influence of soil properties (soil pH, SOM, CEC, Zn and Mn content) on the accumulation of Cd in root, solanaceous, and leafy vegetables in Hunan Province, China. Specifically, the Cd accumulation capability was in the following order: leafy vegetables > root vegetables > solanaceous vegetables.
View Article and Find Full Text PDFTo explore an effective measure to ensure the safety of rice quality in cadmium (Cd)-contaminated farmland, a pot culture experiment was conducted to study the effects of of low Cd content (Cd < 0.2 mg x kg(-1)) phosphorous fertilizers with an application rate of 0.10 or 0.
View Article and Find Full Text PDF[Carbon sequestration effects of rice straw return in double season paddy field in Southern China].
Ying Yong Sheng Tai Xue Bao
December 2011
Article Synopsis
- The study examined the impact of rice straw return (RSR) on soil organic carbon (SOC) levels, methane emissions, and carbon sinks in paddy fields, revealing that RSR significantly increased SOC and altered carbon dynamics.
- RSR elevated methane emissions considerably, with a notable increase in emission fluxes during rice growth stages when combined with fertilizers, while higher amounts of RSR correlated with greater methane output.
- The best results for carbon sink effectiveness occurred with rice straw mulching and no tillage, which notably reduced methane emissions and supported stable rice yields compared to other RSR methods.
Article Synopsis
- Long-term and short-term studies investigated how incorporating rice straw into soil affects soil organic carbon (SOC) levels, methane emissions, and overall carbon sink dynamics.
- Results showed that incorporating rice straw improved SOC but also significantly increased methane emissions, especially during early and late growing seasons, with some methods exacerbating emissions by up to 251.5%.
- The study concluded that using rice straw without tillage minimized methane emissions while achieving high rice yields, making it a more sustainable practice compared to combining straw with tilling and traditional fertilizers.
The effects of paper mill sludge, red mud and zinc fertilizer addition on remediation of acid cadmium contaminated paddy soil were studied in a pot experiment, and their beneficial effects were verified in a field experiment, by using lime as comparison. The pot experiment results showed that a single application (2 g x kg(-1)) of lime, paper mill sludge or red mud increased soil pH significantly. Compared with no applying alkaline substances, the soil exchangeable Ca content was increased by 33.
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