生态沼液与生物酵素在蛋鸡生产上的应用研究

沼液沼渣应用平菇基质进行生态处理并固液分离形成生态沼液(Ebs)与生物酵素(Be)。经测定,两产品营养成分丰富,其中生态沼液pH值为7.64,呈弱碱性,以镁与铁含量较高,分别为0.17%和25.39mg/L;生物酵素pH值为7.38,粗蛋白、腐植酸、粗脂肪、钙、磷、镁、钾含量分别为17.38%、15.70%、3.75%、3.56%、1.06%、0.32%和1.41%。卫生指标除生态沼液铬略偏高外,均达到无公害标准要求。经蛋鸡应用试验结果表明:420～480日龄蛋鸡饲喂5%Be日粮平均产蛋率达86.53%、料蛋比2.29∶1.00、鸡蛋平均蛋白含量12.69%、胆固醇158.10mg/100g,分别比CK组高5%、5%、5%与4%,节省饲料成本7%;应用3%Ebs拌料产蛋率与料蛋比较好,分别为86.49%与2.22∶1.00,分别比CK组高5%和8%。5%Ebs组鸡蛋平均蛋白含量与胆固醇较好,分别为12.31%和159.10mg/100g,比CK组高2%和3%。各组鸡蛋均符合无抗无公害标准要求。

Effects of Continuous Irrigation of Biogas Slurry on Forms and Biological Availability of Pb in Soil of a Tea Garden

Through indoor culture experiments, the effects of continuous irrigation of biogas slurry on the forms and biological availability of Pb in soil of a tea garden were studied. The results show that continuous irrigation of biogas slurry could change the forms of Pb in the soil, and exchangeable Pb, Pb bonded to iron and manganese oxides, and Pb bonded to carbonates transformed to Pb bonded to or- ganic matter and residual Pb in the soil. Among various forms of Pb in the soil, the content of residual Pb was the highest in the soil irrigated with biogas slurry contin- uously in various treatments, accounting for 54.56%, 60.00% and 60.70% in the treatments T1, T2 and T3 respectively. Compared with the CK, the application of bio- gas slurry could decrease the biological activity and biological availability of Pb in the soil obviously, and the reduction of the biological activity was 21.26%-22.83%. In a word, the application of biogas slurry in soil of the tea garden could inhibit the biological activity and biological availability of Pb.

沼肥在烤烟生产上的应用初探

阐述了利用沼渣和秸秆混合堆沤后作种烟基肥,沼液叶面喷施作追肥的烤烟生态生产模式。