【摘要】 目的:通过对正茬和重茬地黄进行大田生物测试,并检测土壤中的一元酚酸类物质,为缓解地黄化感自毒作用和消减连作障碍提供理论依据。方法:采用HPLC检测不同生育时期的正茬和重茬地黄根际土壤中与化感现象密切相关的5种酚酸(阿魏酸、对羟基苯甲酸、香草酸、香豆酸和丁香酸)。结果:正茬地黄生长健壮。收获时,正茬地黄的块根干重和体积分别为重茬地黄的6.02,7.71倍。结论:苗期和伸长期是连作地黄自毒作用发生的关键时期,此时期,重茬地黄土壤中阿魏酸、香豆酸、丁香酸和对羟基苯甲酸的含量和重茬地黄叶片、块根的生长有较强的反比关系,其中阿魏酸对重茬地黄的抑制作用占主要方面。更多还原

【Abstract】 Objective: To determine 5 phenolic acids in the soils around rhizosphere of Rehmannia glutinosa in the field under normal rotation and successive cropping.Method: Phenolic acids related to allelopathy effect in the soils around rhizosphere of R.glutinosa were determined by HPLC.Result: The growth of R.glutinosa under normal rotation was strong.During harvest,the dry weight of the root tube and the volume of the R.glutinosa under normal rotation were 6.02 and 7.71 times of the ones under successive cropping.Conclusion: The seeding stage and elongating stage are the crucial periods for the autotoxic effect of the R.glutinosa under continuous cropping.During these periods,the content of coumaric acid,4-hydroxybenzoic acid,syringic acid,and ferulic acid of R.glutinosa under successive cropping are notably negative correlation with the growth of the leaf and root tuber of R.glutinosa under successive cropping.Among them,ferulic acid plays a major role in the restriction effect on R.glutinosa under successive cropping.更多还原