沼渣施肥对桉树人工林土壤养分的影响

Effect of Biogas Residue Application on Soil Nutrient in Eucalyptus Plantation

针对桉树人工林地力衰退问题,文章通过比较桉树专用肥和沼渣施肥对桉树人工林地土壤养分的影响,以期为桉树人工林的合理经营和可持续发展提供技术支撑。结果表明:沼渣施肥能提高桉树人工林地土壤pH值,使桉树人工林地土壤环境趋向中性;沼渣施肥能增加桉树人工林土壤全氮、全磷、全钾含量,提升桉树人工林土壤肥力水平,其效果与桉树专用肥相媲美。沼渣施肥能增加桉树人工林土壤有机质、碱解氮、有效磷、速效钾含量,其效果要优于桉树专用肥。可见,沼渣能提升桉树人工林土壤肥力水平,可作为桉树肥料施用,还是桉树人工林可持续发展和经营的重要施肥材料。

In view of the decline of soil fertility in artificial eucalyptus forest,to provide technical support for the rational management and sustainable development of eucalyptus plantation,this paper compared the effect of specific fertilizer for eucalyptus and biogas residue fertilizer on soil nutrients in artificial eucalyptus forest. The results showed that application of biogas residue could increase soil pH value and made the soil environment tend to be neutral. It could increase total nitrogen,total phosphorus and total potassium content in soil,improve soil fertility,and the effect was comparable with the eucalyptus-specific fertilizer. Meanwhile,the biogas residue fertilizer could also increase the soil organic matter,alkali-hydrolysable nitrogen,available phosphorus,and rapidly available potassium in eucalyptus plantation soil,and its effect was even superior to that of eucalyptus-specific fertilizer. So,biogas residue can improve soil fertilizer for artificial eucalyptus forest.