低温对小麦幼苗根际土壤酶活性的影响

Effects of Low Temperature on Soil Enzyme Activity of Wheat Seedling

以4个小麦品种(兰考矮早8、偃展4110、豫麦49-198、周麦18)为材料,采用室内盆栽方法分析了低温对小麦幼苗根际土壤及非根际土壤脲酶、蔗糖酶、过氧化氢酶和淀粉酶活性的影响。结果表明,温度显著影响了根际土壤酶的活性,随处理温度的降低和处理时间的延长,根际土壤脲酶、淀粉酶活性逐渐下降,非根际土壤脲酶、过氧化氢酶和淀粉酶活性变化幅度较小。小麦幼苗根际土壤酶活性高于非根际土壤,二者的差异随温度的降低和处理时间的增加逐渐缩小。T3条件下,小麦幼苗土壤蔗糖酶、过氧化氢酶和淀粉酶的活性较高,表明适当的低温促进了土壤酶活性的增加。方差分析结果表明,供试的4个品种,土壤酶活性之间的差异不显著。

With Lankaoaizao 8,Yanzhan 4110,Yumai 49-198 and Zhoumai 18 as experimental materials,effects of low temperature on soil enzyme activity of wheat seedlings with pot experiments in room were studied.The temperature was arranged with 4 levels,and the treatment time was 1,2,3 d,respectively.The activities of urease,sucrase,amylase and catalase in rhizosphere and non-rhizosphere soil were discussed.The results showed that temperature affected enzyme activity in rhizosphere soil significantly at 0.05 level.With the temperature decreasing and treatment time increasing,the activity of urease and amylase in rhizosphere soil weme lowering,while the activity of urease,amylase and catalase in non-rhizosphere soil changed slightly.Soil enzyme activity in rhizosphere was higher than non-rhizosphere,and their gap was narrowing with the decreasing temperature and the processing time.In this research,sucrase,amylase and catalase showed higher activity under T3 treatment,which might indicate that appropriate low temperature promoted the increase of soil enzyme activity.One-way ANOVA showed that there were no significant variations on soil enzyme activity among the 4 wheat varieties.