【摘要】 研究不同的化感物质ＦＡ，４－ｔ－ＢＡ，ＢＨ的不同浓度及其混合物对土壤脲酶活性的影响．研究结果表明，３种化感物质对土壤脲酶活性均有一定的刺激作用，其中４－ｔ－ＢＡ刺激作用最强，但持续时间短；ＢＨ的刺激作用弱，但持续时间长．不同化感物质对脲酶活性的最大刺激点随时间的不同而不同，其中４－ｔ－ＢＡ的５００ｍｇｋｇ－１和ＢＨ的２００ｍｇｋｇ－１均在第７ｄ，而ＦＡ的５００ｍｇｋｇ－１在第４ｄ．各种化感物质混合后，对脲酶活性的刺激作用要强于单一化感物质的作用．更多还原

【Abstract】 Three allelochemicals such as ferulic acid(FA),benzoldehyde(BH)and 4 tert bytylbanzoc acid (4 t BA) at different concentrations of single and mixture have been investigated for their effects on uricase activity.The results showed some stimulating effects of allelochemicals studied on uricase activety.4 t BA among those has more strong effects than others,but the effected time is shorter,and BH has a weak effect but a longer effected time.Allelopathic effects are dependant on the allelochemicals concentration and time of their influence.The strongest effects were 7th day and 4th day for 500mg·kg -1 of 4 t BA,200mg·kg -1 of BH and 500mg·kg -1 of FA,respectively.The stimulation of mixture of allelochemicals is stronger than a single at same concentration.更多还原