Liedl B E, Bombardiere J, Chaffield J M
Division of Agricultural, Consumer, Environmental and Outreach Program, Agricultural and Environmental Research Station, West Virginia State University, 129 Hamblin Hall, Institute, WV 25112-1000, USA.
Water Sci Technol. 2006;53(8):69-79. doi: 10.2166/wst.2006.237.
Thermophilic anaerobic treatment of poultry litter produces an effluent stream of digested materials that can be separated into solid and liquid fractions for use as a crop fertilizer. The majority of the phosphorus is partitioned into the solid fraction while the majority of the nitrogen is present in the liquid fraction in the form of ammonium. These materials were tested over six years as an alternative fertilizer for the production of vegetable, fruit, and grassland crops. Application of the solids as a field crop fertilizer for vegetables and blueberries resulted in lower yields than the other fertilizer treatments, but an increase in soil phosphorus over a four-year period. Application of the digested liquids on grass and vegetable plots resulted in similar or superior yields to plots treated with commercially available nitrogen fertilizers. Hydroponic production of lettuce using liquid effluent was comparable to a commercial hydroponic fertilizer regime; however, the effluent treatment for hydroponic tomato production required supplementation and conversion of ammonium to nitrate. While not a total fertilizer solution, our research shows the effectiveness of digested effluent as part of a nutrient management program which could turn a livestock residuals problem into a crop nutrient resource.
家禽粪便的嗜热厌氧处理产生一股消化物料的废水流，该废水流可分离成固体和液体部分用作作物肥料。大部分磷分配到固体部分，而大部分氮以铵的形式存在于液体部分。这些物料作为蔬菜、水果和草地作物生产的替代肥料经过了六年的测试。将固体用作蔬菜和蓝莓的大田作物肥料，产量低于其他肥料处理，但在四年期间土壤磷含量有所增加。将消化液施用于草地和蔬菜地块，产量与使用市售氮肥处理的地块相似或更高。使用液体废水进行水培生菜生产与商业水培肥料方案相当；然而，水培番茄生产的废水处理需要补充并将铵转化为硝酸盐。虽然不是完整的肥料解决方案，但我们的研究表明，消化废水作为养分管理计划的一部分是有效的，该计划可以将牲畜残留物问题转化为作物养分资源。
