Effect of Exogenous Gibberellin on Wheat Seed Germination under Salt Stress

[Objectives]In this experiment,wheat seeds were treated with different concentrations of gibberellin and different concentrations of salt solution to study the change of germination index of wheat seeds.[Methods]The germination rate,germination potential and germination index of wheat seeds were measured by routine methods,and the effect of exogenous gibberellin on germination of wheat seeds under salt stress was observed.[Results]The germination rate,germination potential and germination index of wheat seeds under salt stress were significantly increased after exogenous treatment of 0.25 and 0.50 g/L gibberellin within the range of salt concentration gradient.However,when the concentration of gibberellin was too high,it would inhibit the germination of seeds.[Conclusions]Appropriate concentration of gibberellin can effectively alleviate the stress caused by salt on wheat seed germination.In this experiment,the best concentration of gibberellin to alleviate salt stress was 0.25 g/L.

不同蛋白水平日粮对肉兔生长性能、血清生化指标和屠宰性能的影响

试验旨在研究低蛋白日粮对肉兔生长性能、血清生化指标和屠宰性能的影响。选取35日龄的伊拉肉兔72只,随机分为3组,每组4个重复,每个重复6只。对照组肉兔饲喂基础日粮(粗蛋白质含量为17.06%),试验1组、试验2组肉兔分别饲喂粗蛋白质水平16.19%、15.23%的日粮。试验期4周。结果显示:与对照组相比,低蛋白日粮组肉兔的平均日采食量、平均日增重及料重比差异均不显著(P>0.05);低蛋白日粮组肉兔的血清总胆固醇含量显著降低,高密度脂蛋白胆固醇含量显著提高(P<0.05)。低蛋白日粮组肉兔的屠宰性能和器官指数与对照组差异不显著(P>0.05)。研究表明,肉兔日粮粗蛋白质水平降低1%~2%,不会影响肉兔的生长性能、健康水平和产肉性能。