氟磺胺草醚残留对后茬作物油菜生理指标的影响

Effect of fomesafen residues on physiological indexes of succeeding crop rape

采用大田试验,以后茬作物油菜为研究对象,研究了长残效除草剂氟磺胺草醚在土壤中的残留规律以及对后茬作物油菜生长的影响.结果表明:与对照相比,氟磺胺草醚田间残留对油菜株高有明显的抑制作用,在使用推荐剂量的8倍处理38 d、4倍剂量处理52 d、初始残留量分别为5.13和2.66 mg/kg时,后茬作物油菜死亡,同时使油菜植株的SOD、CAT酶活性降低,POD酶活性升高,植株的叶绿素含量降低,MDA含量升高.氟磺胺草醚土壤残留会对后茬作物油菜生长产生严重影响,生产中应注意严格控制氟磺胺草醚的使用剂量和安全间隔期.

According to the field experiment,the effect of long residual herbicide fomesafen in characteristic of soil residue and growth of succeeding crop rape was studied.The results showed that：Compared with the CK,the fomesafen farm residue had significantly resistance on plant height of rape,38 and 52 days later, residual concentration 5.13 and 2.66 mg/kg,rapeseed died,meanwhile SOD,CAT enzyme activity of rape decreased,the POD enzyme activity raised,the content of MDA in rapeseed raised,chlorophyll content reduced.Fomesafen residues in soil can have significant negative effects on succeeding crop rape.In the production,we should pay attention to control the dosage of fomesafen and the interval period of chemical safety.