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Published in last 1 year |  In last 2 years |  In last 3 years |  All Please wait a minute... For Selected: Download Citations EndNote Reference Manager ProCite BibTeX RefWorks Toggle Thumbnails Select The soil Cd and Pb risk threshold based on quality safety of Panax notoginseng MENG Xi, LIANG She-wang, WU Han, LU Chun-wei, HE Zhong-jun HUBEI AGRICULTURAL SCIENCES    2024, 63 (2): 25-30.   DOI: 10.14088/j.cnki.issn0439-8114.2024.02.005 Abstract （67）      PDF （2235KB）（21）       Knowledge map    Save To ensure green planting and quality safety of Panax notoginseng, the soil risk threshold of Panax notoginseng safety production in China was discussed. Physicochemical properties of soil, content and available contents of Cd and Pb in soil, and contents of Cd and Pb in the main root of Panax notoginseng were analyzed. The relationship between Cd, Pb in the main root of Panax notoginseng and soil physical and chemical properties as well as total and available Cd, Pb in soil was analyzed by linear correlation analysis. The regression equation between total available Cd, Pb in soil and Cd, Pb in the main root of Panax notoginseng was established by the regression model, and the soil available Cd and Pb threshold was inversely estimated. The results showed that the over standard rates of Cd and Pb in soil samples were 83.64% and 16.36%, respectively. The soil Cd pollution was serious and the soil Pb was at a clean level. The Pb content in the main root of Panax notoginseng did not exceed the standard, and the exceeding rate of Cd content was 29.09%. Soil pH was negatively correlated with Pb in the main root of Panax notoginseng. There was a significant positive correlation and a extremely significant positive correlation between Cd in the main root of Panax notoginseng and the soil Cd content and the soil available Cd, respectively. Pb in the main root of Panax notoginseng was significantly positively correlated with Pb content and available Pb in soil. Based on the limitation standard of Cd and Pb in the main root of Panax notoginseng, the threshold value of soil available Cd and soil available Pb was 0.27 mg/kg and 70.66 mg/kg, respectively. Reference | Related Articles | Metrics Select Improving effect of different amendments on coastal saline-alkali soil WANG Li-yan, PAN Jie, ZHAO Jie, LI Meng-qi, ZHANG Hui, WANG Chun-shui, DONG Yu-chen, XIAO Hui HUBEI AGRICULTURAL SCIENCES    2024, 63 (2): 31-35.   DOI: 10.14088/j.cnki.issn0439-8114.2024.02.006 Abstract （88）      PDF （3094KB）（51）       Knowledge map    Save In order to study the improvement effect of different amendments on coastal soil, a pot experiment was conducted to study the effects of calcium sulfate, aluminium sulfate, ferric sulfate, ferrous sulfate and sulfur on soil total salt, pH and ion composition. The results showed that with the different amendments applied, the content of ions in the infiltration water varied greatly. In the first leaching, the contents of Na+ and Cl- in the infiltration water treated with calcium sulfate, aluminum sulfate and ferric sulfate were 54.78% and 58.25%, 35.44% and 39.22%, 32.65% and 34.82% higher than those of CK, respectively, indicating that the addition of these three amendments had a better effect on soil salinity reduction, and calcium sulfate treatment had the best effect. In the second leaching, the Na+ content of ferric sulfate, calcium sulfate and aluminum sulfate treatment was 75.14%~347.76% higher than that of CK. Combined with two times of leaching, the results showed that calcium sulfate treatment had a more significant effect on the leaching of Na+ in soil. Compared with CK, the soil pH of each amendment treatment decreased to varying degrees, and the pH decreased by 2.23%~3.84%. Different amendments had different effects on soil ions. The contents of Ca2+ and Mg2+ in soil treated with amendments were higher than those of CK. Considering the effects of different amendments on soil pH, Na+ and Cl-, it was suggested that ferric sulfate and calcium sulfate should be combined to improve coastal saline-alkali land. Reference | Related Articles | Metrics page Page 1 of 6 Total 12 records First page Prev page Next page Last page