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采用盆栽试验,以东农52为材料,经不同剂量乙草胺处理后测定大豆叶绿素含量、根系活力、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量变化。结果表明:随着乙草胺剂量的增加,叶绿素含量和根系活力逐渐降低,而SOD活性和MDA含量逐渐增加;随时间的延长,各乙草胺浓度处理的叶绿素含量和根系活力均先降低后升高,而SOD活性和MDA含量先升高后降低;施药后第28天,在1 890和2 700 g·hm-2有效剂量下大豆叶绿素含量、根系活力、SOD活性和MDA含量已恢复到接近对照水平。因此,乙草胺在1 890和2 700 g·hm-2有效剂量对大豆较为安全。
Pot experiment was conducted to study the changes of chlorophyll content, root activity, superoxide dismutase (SOD) activity and malondialdehyde (MDA) content in soybean after treatment with different doses of acetochlor by using Dongnong 52 as material. The results showed that with the increase of acetochlor dosage, the content of chlorophyll and root activity decreased gradually, while the content of SOD and MDA increased gradually. With the prolongation of time, the content of chlorophyll and root activity of acetochlor decreased firstly While SOD activity and MDA content firstly increased and then decreased. On the 28th day after spraying, the chlorophyll content, root activity, SOD activity and MDA content of soybean were restored under the effective dose of 1 890 and 2 700 g · hm-2 To close to the control level. Therefore, acetochlor is safer for soybeans at effective doses of 1890 and 2700 g · hm-2.