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为探讨连作花生土壤中酚酸类物质的累积与花生连作障碍的关系,通过大田盆栽试验,研究了对羟基苯甲酸、肉桂酸对花生花针期(出苗后45 d)、结荚初期(出苗后75 d)、结荚末期(出苗后105 d)根部土壤养分、酶活性及产量的影响.结果表明:经两种酚酸类物质处理后,花生根部土壤养分和酶活性均发生了明显的变化,以在花针期受到的影响最大,土壤碱解氮、有效磷、有效钾和土壤脲酶、蔗糖酶、中性磷酸酶活性均显著降低;到花生结荚初期和结荚末期,两种物质对土壤养分、酶活性的抑制作用有减弱趋势.初始含量相同时,肉桂酸的化感作用相对较强.高浓度(80 mg·kg~(-1)干土)对羟基苯甲酸、肉桂酸处理分别使每盆花生荚果产量降低了45.9%、52.8%,单株结果数降低了46.2%、48.9%.
In order to explore the relationship between the accumulation of phenolic acids and the obstacle of continuous cropping of peanut in continuous cropping peanut, the effects of p-hydroxybenzoic acid and cinnamic acid on peanut needling (45 d after emergence), early pod After 75 d), the soil nutrient, enzyme activity and yield at the end of pod (post-emergence 105 d) were studied.The results showed that the soil nutrient and enzyme activity of peanut roots were significantly different after two phenolic acids treatment Change, in order to be the greatest impact on the flower needle, soil alkaline hydrolysis nitrogen, available phosphorus, available potassium and soil urease, invertase, neutral phosphatase activity were significantly reduced; peanut pod early and pod end, two The inhibitory effect of the substance on soil nutrient and enzyme activity tended to be weakened, and the same allelopathy was observed when the initial content was the same.Cinnamic acid (80 mg · kg -1) Acid treatment reduced peanut pod yield by 45.9% and 52.8%, respectively, and the number of single plant fruit decreased 46.2% and 48.9% respectively.