Burgess R P, Carey J B, Shafer D J
Department of Poultry Science, Texas A&M University, College Station 77843-2472, USA.
Poult Sci. 1998 Nov;77(11):1620-2. doi: 10.1093/ps/77.11.1620.
Land application of broiler litter must fully regard agronomic and environmental issues, which requires increased precision in all aspects of land application of poultry litter. Previous researchers note that litter experiences significant nitrogen loss due to ammonia volatilization during the drying process. Others note that pH of poultry houses and litter significantly affects nitrogen loss due to ammonia volatilization. Recent work shows that acidifying agents effectively reduce ammonia generation in poultry production facilities. This concept is used in this study to adjust the pH of broiler litter samples prior to drying to reduce nitrogen loss during the drying process. Samples from four sources were used. Untreated litter was compared to litter treated with Al2(SO4)3, (10:1 wet weight basis) either in small (10 g) or large (100 g batches). Both Al2(SO4)3 treatment methods significantly lowered litter sample pH. No significant differences were observed in litter moisture analysis values. Regardless of source, litter treated in small batches had significantly higher nitrogen values than untreated litter. Large batches of treated litter did not consistently have higher nitrogen values than untreated litter. Treatment of litter samples with Al2(SO4)3 prior to drying resulted in more accurate quantification of nitrogen in litter, which can ultimately result in more accurate utilization of litter in agronomic applications.
肉鸡粪便的土地施用必须充分考虑农艺和环境问题，这就要求在禽畜粪便土地施用的各个方面提高精准度。先前的研究人员指出，在干燥过程中，粪便会因氨挥发而出现大量氮损失。其他人则指出，禽舍和粪便的pH值会显著影响氨挥发导致的氮损失。最近的研究表明，酸化剂能有效减少家禽生产设施中的氨生成。本研究采用这一概念，在干燥前调节肉鸡粪便样品的pH值，以减少干燥过程中的氮损失。使用了来自四个来源的样品。将未处理的粪便与用硫酸铝（湿重比为10:1）处理的粪便进行比较，处理方式分为小批量（10克）和大批量（100克）。两种硫酸铝处理方法均显著降低了粪便样品的pH值。在粪便水分分析值方面未观察到显著差异。无论来源如何，小批量处理的粪便氮含量均显著高于未处理的粪便。大批量处理的粪便氮含量并不总是高于未处理的粪便。干燥前用硫酸铝处理粪便样品可更准确地定量粪便中的氮，最终可在农艺应用中更准确地利用粪便。
