Ge Jianzhen, Fu Wenhui, Bai Magaweng, Zhang Lu, Guo Bolin, Qiao Qianluo, Tao Runyu, Kou Jiancun
College of Grassland Agriculture, Northwest A&F University, Yangling 712100, China.
J Pestic Sci. 2021 Nov 20;46(4):342-351. doi: 10.1584/jpestics.D21-017.
In order to understand the degradation of different residual pesticides of white clover silage and their influence on silage quality, three commonly used orchard pesticides with different concentrations were added to the white clover and fermented for 90 days. The results showed that the degradation rate of cypermethrin and its toxic degradation product 3-phenoxybenzoic acid (3-PBA) was the highest after silage, at different concentrations, both were 100%. The degradation rate of Tebuconazole and chloropyridine was 72.47-80.27% and 47.76-64.82%, of which 3,5,6-trichloro-2-pyridinol (TCP) content, poisonous toxic degradation product, increased 0.0525-0.253 mg·kg. The residues of beta-cypermethrin and tebuconazole had reached safety standards after silage. As compared with the control, the contents of lactic acid, acetic acid, and propionic acid increased in the treated samples. The higher concentrations of three pesticides all significantly reduced the lactic acid content of silage (<0.05). Pesticides had different effects on the nutritional components of white clover silage. Conclusively, silage is a potential way to expand the utilization of covering plants in orchards.
为了解白三叶青贮饲料中不同残留农药的降解情况及其对青贮品质的影响，将三种不同浓度的常用果园农药添加到白三叶中，发酵90天。结果表明，氯氰菊酯及其有毒降解产物3-苯氧基苯甲酸（3-PBA）在青贮后的降解率最高，不同浓度下均为100%。戊唑醇和氯啶的降解率分别为72.47-80.27%和47.76-64.82%，其中有毒有害降解产物3,5,6-三氯-2-吡啶醇（TCP）含量增加了0.0525-0.253 mg·kg。青贮后高效氯氰菊酯和戊唑醇的残留量均达到安全标准。与对照相比，处理样品中乳酸、乙酸和丙酸的含量增加。三种农药的较高浓度均显著降低了青贮饲料的乳酸含量（<0.05）。农药对白三叶青贮饲料的营养成分有不同影响。总之，青贮是扩大果园覆盖植物利用的一种潜在途径。
