| 肖瑞芳,沈普翠,赵秀兰.三种生物质炭对红壤和黄壤镉有效性的影响[J].农业环境科学学报,2017,36(5):915-920. |
| 三种生物质炭对红壤和黄壤镉有效性的影响 |
| Effects of three types of biochar on bioavailability of cadmium in a red soil and a yellow soil |
| 投稿时间：2016-11-14 |
| DOI：10.11654/jaes.2016-1441 |
| 中文关键词: 生物质炭 镉 生物有效性 |
| 英文关键词: biochar cadmium bioavailability |
| 基金项目:国家自然科学基金项目（41471272） |
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| 摘要点击次数: 2019 |
| 全文下载次数: 1980 |
| 中文摘要: |
| 采用盆栽试验，研究了5%的花生壳炭、竹炭和小麦秸秆炭对红壤和黄壤中有效镉含量及玉米幼苗镉吸收和转运的影响。结果表明：3种生物质炭使红壤和黄壤的pH分别提高0.12~0.59和0.21~1.00，有机质含量分别提高35.43%~83.34%和52.14%~142.82%，均达到显著性水平（P<0.05）；生物质炭使红壤和黄壤有效镉含量分别降低12.8%~20.1%和17.7%~29.9%，降幅在红壤中以花生壳炭处理最大，黄壤中则以小麦秸秆炭处理最大，但两种土壤中花生壳炭、小麦秸秆炭处理有效镉含量差异不显著；3种生物质炭一定程度上可抑制红壤中玉米的生长，但花生壳炭和竹炭可促进黄壤中玉米幼苗的生长；花生壳炭和竹炭使红壤中玉米幼苗地上部镉含量分别降低19.63%和23.10%，竹炭使黄壤中玉米幼苗根部镉含量提高14.88%，其余处理对玉米幼苗根部和地上部的镉含量影响均不显著。这说明尽管生物质炭可通过提高土壤pH和有机质含量降低红壤和黄壤的有效镉含量，但对植物镉含量的影响则因土壤类型和生物质炭种类而异。 |
| 英文摘要: |
| A pot experiment was carried out to investigate the effects of three types of biochar-peanut shell biochar (PSB), bamboo biochar (BB) and wheat straw biochar (WSB) on the bioavailability of cadmium (Cd) in a red soil and a yellow soil. The biochar was applied at the rate of 5%. The results showed that the pH values of the red soil and the yellow soil were increased by 0.12 to 0.59 unit, and 0.21 to 1.00 units, respectively, the contents of organic matter were increased by 35.43% to 83.34% and 52.14% to 142.82% respectively, but the contents of available Cd were decreased by 12.8% to 20.1% and 17.7% to 29.9%, respectively. Although the highest decrease in the available Cd content was observed in the PSB-treatment for the red soil and in the WSB-treatment for the yellow soil, there were no significant difference for soil available Cd between the two treatments. The growth of corn seedlings were, to a certain extent, inhibited by biochar application in red soil, but were promoted by application of PSB and BB in the yellow soil. The contents of Cd in the shoot of corn seedlings were decreased by 19.63% and 23.10% for the treatment of PSB and BB, respectively, in the red soil, but the Cd content in the root was increased by 14.88% for the BB treatment in the yellow soil. The other treatments had no significant influence on Cd contents in corn seedlings. Therefore, it is concluded that although the biochar could decrease the content of available Cd through increasing pH values and organic matter content of soils, the effect of biochar on Cd content in plants varies with the types of soil and biochar. |
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