Data from: Understanding the role of pig manure, rice straw and calcium carbonate on the cadmium pollution in soil-wheat system
Data files
This dataset is embargoed and will be released on Sep 19, 2025 . Please contact Hui Qing Chang at moc.621@gnahcqh with any questions.
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Abstract
To explore the specific effects of pig manure and rice straw on cadmium-contaminated soils and the effect of different mass fractions of calcium carbonate on cadmium efficacy, a pot experiment was conducted with different rates of pig manure (RS), rice straw (PM) and calcium carbonate (CC). The results showed that pig manure addition increased the soil HA/FA ratio, thereby reducing the available Cd. The addition of calcium carbonate increased the soil pH and reduced the available Cd, The addition of pig manure and calcium carbonate significantly reduced the Cd content of wheat grains by 51.96% and 45.95%, respectively, at 3% and 5% application rates. Rice straw application reduced the soil pH, improved the soil Cd availability, and increased the accumulation of Cd in wheat grains. Compared with that in the control, the grain biomass increased significantly with 3% pig manure and 3% rice straw application, and the grain biomass increased significantly, by 58.86% and 39.11% and 93.3% and 75.08%, respectively, in 2020 and 2021. With the application of calcium carbonate, the grain biomass of wheat first decreased and then increased. Additionally, the grain biomass significantly increased by 26.36% and 71.22%, respectively, at the 5% calcium carbonate application rate. Therefore, high application rates of pig manure (3% and 5%) have potential application in the safe production of wheat in Cd-contaminated soils.
https://doi.org/10.5061/dryad.m63xsj4bp
Description of the data and file structure
Sheet 1 is the original data of Table 1 in this paper, including some basic physical and chemical properties of the soil tested；
Sheet 2 is Table 2 in this paper, including the basic physicochemical properties of the tested materials；
Sheet 3 is the original data of Figure 1 in this article, including changes in soil pH (1:2.5 w/v) (in red), alkali-hydrolysable N, Olsen's P (in red), and available potassium under different treatments;
Sheet 4 is the original data of Table 3 in this paper, which is the biomass of each part of wheat under different treatments;
Sheet 5 is the original data of Table 4 of this paper, which is the cadmium content of each part of wheat under different treatments;
Sheet 6 is the original data of Table 5 of this paper, which is the total cadmium and DTPA-extractable Cd in soil,
Sheet 7 is the original data of Table 6 of this article. It's the Cd intake pathway(ADD:the amount of exposure by mouth) and HQ(Single factor health risk index of heavy metals), The calculation formula is
ADD=(C*IR*EFED)
/(BWAT) and HQ=ADD/Rfd, where ADD is the amount of exposure by mouth (kg·d)/mg; C is the concentration of heavy metals, mg/kg; IR is the intake of mouth, 0.177 kg/d for children and 0.5 kg/d for adults ; EF is the duration of exposure of 365 d/a ; ED is the lifetime duration of exposure, 6 years for children and 24 years for adults ; AT is the average exposure time, 3650 days for children and 10950 children (Wang et al., 2009); BW is the body weight, 16 kg for children and 62 kg for adults ;RfD is the reference dose of exposure route in mg/(kg·d), RfDCd is 0.001. Sheet 8 is the original data of Figure 2 of this paper, which shows the effects of pig manure, rice straw and calcium carbonate on soil organic matter, DOC, easily oxidized organic carbon and active calcium carbonate;
Sheet 9 is the original data of Table 7 in this paper, which shows the effects of different treatments on soil humic acid (HA) , fuluric acid (FA) and HA/HF;
Sheet 10 is the original data of Figure 3 in this paper, which shows the relationship between soil DTPA-Cd and soil pH, grain Cd, HA/FA and active calcium carbonate. The data in this study were processed using Excel 2019 and statistically analyzed using SPSS 23.0 software. The least significant difference (LSD) method was used to determine significant differences (P < 0.05). Drawing using origin2021.
The wheat samples harvested in October were separated into roots, stems, grains. The plant tissues were subsequently washed with deionized water 2-3 times. The plants were then incubated at 105℃ for 30 min, then at 70°C until a constant weight was reached, after which the dry weight was measured. The dry samples of each part of the plant were ground and sieved. Soil samples were collected after plant harvest, then sieved through 0.85 mm and 0.15 mm polyethylene mesh after air drying.
The soil Cd was extracted by the DTPA [TEL (0.005 mol/L DTPA-0.100 mol/L triethanolamine)-0.010 mol/L CaCl2] leaching method, The plant samples were digested with HNO3-HClO4, the soil samples were digested with HNO3-HClO4-HF, the digested samples were subjected to inductive-coupled-plasma-emission spectroscopy (Agilent 5110 ICP‒OES) . Other physicochemical properties of the soil were determined with reference to the Methods of Agricultural Chemical Analysis of Soil: The pH values of the soil samples (1:2.5 soil-to-water ratio, w/v) were measured by potentiometry using a pH meter (PHS-3E); the content of soil organic carbon was determined using the potassium-dichromate-digestion method; the total nitrogen of the soil was determined using the semimicro-Kjeldahl method; the Olsen's P was measured with the sodium-bicarbonate method; the available potassium was measured with the flame-photometry method. Soil active calcium carbonate was determined by potassium permanganate titration. Soil humic acids and fulvic acids were first extracted by acid precipitation , then determined by the Churin method.