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| Influences of alkaline fertilizer application on soil pH and soil available cadmium |
| Received:March 03, 2021 |
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| KeyWord:alkaline fertilizer;soil pH;available cadmium;flowering Chinese cabbage |
| Author Name | Affiliation | E-mail | | CAO Qiaoying | College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | | ZHAN Yaowei | College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Environment Friendly Fertilizer Engineering Technology Research Center of Guangdong College, Guangzhou 510642, China | | | DING Erquan | College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Environment Friendly Fertilizer Engineering Technology Research Center of Guangdong College, Guangzhou 510642, China | | | GAO Chengxiang | College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Environment Friendly Fertilizer Engineering Technology Research Center of Guangdong College, Guangzhou 510642, China | | | ZHANG Lidan | College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Environment Friendly Fertilizer Engineering Technology Research Center of Guangdong College, Guangzhou 510642, China | | | FAN Xiaolin | College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Environment Friendly Fertilizer Engineering Technology Research Center of Guangdong College, Guangzhou 510642, China | xlfan@scau.edu.cn |
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| Abstract: |
| To study the effects of alkaline fertilizer (a new type of fertilizer) on reduction of soil acidity and cadmium pollution, a pot experiment was conducted using cadmium-contaminated soil from Zhuzhou, Hunan Province, and two varieties of flowering Chinese cabbage, which had either high (Te Qing 4) or low (Lv Bao) cadmium accumulation. The experiment included the following three treatments:alkaline fertilizer, urea, and no nitrogen (CK) treatment. Sixty-five days after transplanting (DAT), the soil pH value in the alkaline fertilizer treatment was 0.61 and 0.20 units higher than that in the urea and CK treatments with Te Qing 4, respectively, whereas the soil pH in the alkaline fertilizer treatment was 0.36 and 0.12 higher than that in the urea and CK treatments with Lv Bao, respectively. The results implied that application of alkaline fertilizer could improve the soil pH over an extended period. The available cadmium content of the soil treated with alkaline fertilizer was significantly lower than that with CK in each sampling period, and the available cadmium content in the urea treatment was 0.11 and 0.08 mg·kg-1 of Te Qing 4 and Lv Bao pots higher than that in the alkaline fertilizer treatment at 65 DAT. Compared with CK, urea and alkaline fertilizers significantly increased the nitrogen content of flowering Chinese cabbage. Furthermore, urea and alkaline fertilizers significantly reduced the cadmium content of cabbage. Based on these findings, application of alkaline fertilizer in cadmium-contaminated farmland soil can not only ensure cabbage biomass and soil nitrogen supply but also continually reduce soil acidity and available cadmium content. |
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