| 嘧菌酯和丙环唑在大豆上残留分布及降解动态研究 |
| |
| 作者姓名： | 周启圳 何翎 刘丰茂 钟江春 |
| |
| 作者单位： | 中国农业大学理学院, 北京 100193 |
| |
| 基金项目： | 中国农业大学 2115人才工程 |
| |
| 摘 要： | 为分析嘧菌酯和丙环唑复配农药在大豆作物上的残留分布及降解动态，分别在北京和安徽两地对大豆作物进行田间施药，得到了青豆与大豆（干豆）不同生长阶段的果实、茎、叶的样品，并通过QuEChERS方法提取、液质联用色谱仪检测对各样品进行了农药残留浓度的测定。结果表明：青豆与大豆上农药残留规律近似，不同部位的残留浓度表现为叶>茎>果实，其中鲜叶上嘧菌酯和丙环唑最大残留量为0.709 mg·kg-1和1.300 mg·kg-1，鲜茎上分别为0.032 mg·kg-1和0.059 mg·kg-1，青豆上分别为0.025 mg·kg-1和0.029 mg·kg-1，干叶上分别为0.546 mg·kg-1和0.581 mg·kg-1，干茎上分别为0.024 mg·kg-1和0.050 mg·kg-1，大豆上分别为0.026 mg·kg-1和<0.01 mg·kg-1。根据降解动态公式拟合，嘧菌酯和丙环唑在鲜叶上的消解速率均大于其在干叶和干茎上的消解速率。嘧菌酯和丙环唑的复配剂按推荐方式施用时，不会带来潜在的残留风险，但由于茎和叶上的残留浓度远大于大豆果实，在饲料选择时需要关注农药残留问题，可通过适当的加工处理降低饲料中农药残留对家畜带来的影响。
|
| 关 键 词： | 农药残留，消解动态，大豆，青豆，残留分布，饲料 |
| 收稿时间： | 2021/9/13 0:00:00 |
| 修稿时间： | 2021/10/11 0:00:00 |
Residue distribution and degradation dynamics of azoxystrobin and propiconazole on soybean crops |
| |
| Authors: | ZHOU Qizhen HE Ling LIU Fengmao ZHONG Jiangchun |
| |
| Institution: | College of Science, China Agricultural University, Beijing 100193, China |
| |
| Abstract: | In this study, we aimed to analyze the residue distribution and degradation dynamics of azoxystrobin and propiconazole on soybean crops, and provide suggestions for the rational use of pesticides and safe selection of feed. Field trials upon application of azoxystrobin and propiconazole in crop fields of Beijing and Anhui were conducted to obtain green beans and soybean samples, including leaf and stem samples, respectively. Then, the samples were extracted using QuEChERS method and the residues were assessed using liquid chromatography-tandem mass spectrometry. We found that whether it was green bean or soybean, the order of residual concentration in different parts was leaf > stem > bean. The maximum levels of residues of azoxystrobin and propiconazole in fresh leaf samples were 0.709 and 1.300 mg·kg-1, respectively, which were 0.032 mg·kg-1 and 0.059 mg·kg-1 in fresh stem, 0.025 mg·kg-1 and 0.029 mg·kg-1 in green bean, 0.546 mg·kg-1 and 0.581 mg·kg-1 in dry leaf, 0.024 mg·kg-1 and 0.050 mg·kg-1 in dry stem, and 0.026 mg·kg-1 and <0.01 mg· kg-1 in soybean, respectively. Moreover, the degradation rate of azoxystrobin and propiconazole on fresh leaf was higher than that of the dry leaf and stem, which was assessed fitting of the degradation dynamic formula. Therefore, azoxystrobin and propiconazole do not pose a potential residue risk when applied in the recommended doses. However, since their concentrations on stems and leaves were much higher than that on beans, proper attention must be paid to the pesticide residues during feed selection. However, to reduce the burden of pesticide residues on livestock, green bean stem samples after a certain period of treatments can be utilized as feed. |
| |
| Keywords: | pesticide residues digestion dynamics soybean green beans residue distribution feed |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
