施用生物炭对花生产量及吸收累积邻苯二甲酸酯的影响

Effects of Biochar on Absorption and Accumulation of Phthalic Acid Esters in Peanut Plants

选择花生作为研究对象,设置0,0.5%,1.0%,5.0%4个生物炭施用水平,利用盆栽试验研究生物炭对花生吸收累积邻苯二甲酸酯的影响。结果表明:施用生物炭对花生产量具有一定的促进作用,在生物炭高、中、低施用水平下,花生籽粒产量分别增加73.47%,67.41%,34.79%;在未施用生物炭条件下,花生植株各器官邻苯二甲酸二丁酯(DBP)和邻苯二甲酸二(2-乙基)己酯(DEHP)的含量分别为1.51~5.82 mg/kg和1.36~4.82 mg/kg,DBP和DEHP含量最高的器官均为根;施用生物炭会减少花生植株对DBP、DEHP的吸收,尤其在生物炭中、高施用水平下,花生植株各器官DBP和DEHP含量与对照相比均达到显著水平;随着生物炭施用量的增加,花生籽粒对DBP和DEHP的富集因子均显著降低。

Peanut was selected as the object to investigate the effects of biochar on absorption and accumulation of phthalic acid esters in peanut plants through pot experiment under different application rate of biochar including0,0. 5%,1. 0%,5. 0%. The results showed that the yield of peanut kernels increased 73. 47%,67. 41% and34. 79% respectively under the high,medium and low utilization level of biochar,which indicates the biochar plays a positive role in the yield of peanut. In the soil without biochar,the content of DBP and DEHP in different organs of peanut plant were 1. 51-5. 82 mg/kg and 1. 36-4. 82 mg/kg respectively. The content of DBP and DEHP in root was higher than other organs in peanut. Biochar reduced the absorption of DBP and DEHP in peanut plants,especially in medium and high application level of biochar,the content of DBP and DEHP in different organs of peanut was significantly lower than in control treatment. With increasing application of biochar,the enrichment factors of DBP and DEHP in peanut kernels reduced significantly.