施用沼液浓度对苏木苗期生长的影响

[目的]探讨苏木苗期沼液适宜的施用浓度,为沼肥在林业树种上的应用提供参考.[方法]通过单因素完全随机区组试验,研究施用不同稀释浓度（农灌水与沼液稀释比例分别为3∶1、1∶1、1∶3）沼液对苏木苗生长的影响.[结果]苏木苗生长随着沼液浓度不同表现出较大差异,稀释比例为1∶1时苏木苗苗高、地径显著高于其他处理.不同浓度的沼液对苏木苗生物量指标影响显著,其中稀释比例为1∶1处理苏木苗根鲜重、地上鲜重、根干重、地上千重高于对照.苏木苗苗木质量指数随沼液浓度变化表现出差异,稀释比例为1∶1处理苗木质量指数为5.49,显著高于对照.[结论]苏木苗期施用沼液能有效促进苗木生长,施用时需要做稀释处理,稀释比例为1∶1效果最佳.

Effects of biogas slurry on Caesalpinia sappan Linn growth

[Objective]The suitable biogas slurry concentration on Caesalpinia sappan Linn was studied to provide references for the application of biogas slurry on forestry. [ Method ] Single fact＇or and complete stochastic region experiments were performed to research the effects of biogas slurry of different concentrations （Dilution ratio of irrigation/biogas slurry was 3：1, 1：1 and 1：3） on Caesalpinia sappan Linn growth, [Result]The growth of Caesalpinia sappan Linn displayed big differences with different concentrations of biogas slurry. In dilution ratio of 1：1, diameter, height, shoot fresh weight,root fresh weight, root dry weight and shoot dry weight were significantly higher than those of other treatments. In dilution ratio of 1 ： 1, the seedling quality index was 5.49, which was significantly higher than that of CK. The biomass values of Cae- salpinia sappan L. had significant differences with different treatments. [Conclusion]The diluted biogas slurry could promote growth of Caesalpinia sappan Linn, and the best dilution ratio was 1：1.