贵池区沼气肥营养成分及应用效果

目的]研究沼气肥的营养成分及应用效果。方法]对贵池区沼气生态示范村的沼气肥、土壤、水稻秧苗进行农化常规分析。结果]沼渣中有机质、N、P、K含量较沼液中含量高,但二者的养分含量较全面;沼渣中的C/N比值较高,沼液中的C/N比值较低,沼液中氮与有机质相关性较好,而沼渣中则表现不明显;沼液中钾的含量高且变化很大。施沼渣的农田有机质等养分含量较对照农田高。施沼气肥土壤种植的水稻N、P、K含量比未施沼气肥的高,尤其是K的含量增长明显。结论]沼气肥含有丰富的营养物质,可以改善土壤有机质的C/N比值。沼渣中有机质含量丰富适合作底肥,沼液中速效养分含量较高适合作追肥。

Nutrition Components and Application Effect of Biogas Fertilizer in Guichi District

Objective] The aim was to study the nutrition components and application effect of biogas fertilizer.Method] The conventional agrochemical analysis was conducted on the biogas fertilizer,soil and rice seedling of ecological demonstration village of biogas in Guichi district.Result] The organic matter, N,P and K contents were higher in biogas dregs than that in biogas fluid,but both their nutrient contents were overall.The C/N ratio was higher in biogas dregs and lower in biogas fluid.The relativity between nitrogen and organic matter was better in biogas fluid and not showed obviously in biogas dregs.Potassium content changed greatly and was very high in biogas fluid.The nutrient content such as organic matter was higher in the field fertilized biogas dregs than that in CK field.The N,P and K contents in the rice planted in the soil with biogas fertilizer were higher than that in the soil without biogas fertilizer,especially K content increased significantly.Conclusion] Biogas fertilizer rich in nutrition matter and could improve C/N ratio of soil organic matter.The biogas dregs was rich in organic matter and fitted to be base fertilizer.The biogas fluid was richer in available nutrient and fitted to be dressing fertilizer.