本研究以水稻、敌稗敏感性突变稻及稗草的茎、叶部做为试材,研究供试植物从其茎、叶部吸收改稗一定时间后,在其体内的变化情况与吸收时间的关系。试验结果表明,水稻茎、叶吸收的敌稗,在稻体内迅速转化成3,4——二氯苯胺,并且随着吸收时间的延长其生成量也相应增高。但是敌稗敏感性突变相及稗草茎、叶吸收的敌稗,无论时间长短,在其体内均不易分解。另外,在供试植物体内,未与酶反应的剩余敌稗,在酸性条件下分解成3,4——二氯苯胺的量,在水稻体内少,而在后两者中多。水稻在完整细胞液中的酶活性远较后两者强。上述事实说明稻属植物对敌稗的耐药力差异,来自它们分解敌稗的能力,即与体内敌稗分解酶的含量有关。 In this study, the stems and leaves of rice and barnyardgrass susceptible mutant rice and barnyardgrass were used as test materials to study the changes and absorption time of the tested plants after they were given barnyardgrass in their stems and leaves for a certain period of time Relationship. The results showed that propanil, which is absorbed by the stems and leaves of rice, rapidly transformed into 3,4-dichloroaniline in rice and its production increased with the increase of absorption time. However, the sensitive virulent phase of barnyard grass and barnyard grass stems, leaves absorbed by propanil, regardless of the length of time, are not easy to break down in their body. In addition, the amount of remaining propanil, which did not react with the enzyme, decomposed to 3,4-dichloroaniline under acidic conditions was less in rice plants than in the latter two plants. The enzyme activity of rice in intact cell solution is much stronger than the latter two. The above fact indicates that the difference in resistance of the genus Oryza to propanil is due to their ability to decompose propanil, which is related to the amount of propanil degrading enzyme in the body.