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Nitrogen mass balance for spray fields fertilized with liquid swine waste.

机译:液态猪粪肥施肥的喷雾田的氮素质量平衡。

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摘要

The swine industry has expanded rapidly in North Carolina over the last two decades. Animals are raised in confined facilities where waste is flushed into open-air lagoons and the liquid phase is land-applied to receiving fields as an organic fertilizer. The post-application fate has not been fully documented. Therefore, on three occasions I experimentally applied liquid swine waste at typical doses (40 to 130 kg N ha-2) to defined plots in an active spray field on a representative North Carolina swine production facility and constructed an N mass balance for a 14 to 18 d period. Most of the N (52%) was assimilated into plants, while surprisingly little (9%) was volatilized. Microbial immobilization accounted for 10% of the applied N, while 12% migrated below the active soil zone (surface 20 cm) and was presumably lost to groundwater. The soil storage term averaged 16%, while the denitrification sink was inconsequential (1%).
机译:在过去的二十年中,养猪业在北卡罗来纳州迅速发展。在密闭设施中饲养动物,将废物冲洗到露天泻湖中,然后将液相作为有机肥料土地施用到接收地。申请后的命运尚未得到充分记录。因此,我有三次在典型的北卡罗莱纳州猪生产设施的主动喷雾场中,以典型剂量(40至130 kg N ha-2)对猪场进行了典型剂量的实验,并建立了N的质量平衡为14至18 d期。大部分氮(52%)被吸收到植物中,而令人惊讶的是很少(9%)被挥发。固定微生物占施氮量的10%,而有12%的微生物迁移到了活跃的土壤区域(地表20厘米)以下,并可能流失到地下水中。土壤存储期平均为16%,而反硝化池则无关紧要(<1%)。

著录项

  • 作者

    DeBerardinis, Jeffrey T.;

  • 作者单位

    The University of North Carolina at Chapel Hill.;

  • 授予单位 The University of North Carolina at Chapel Hill.;
  • 学科 Agriculture Soil Science.; Agriculture Plant Pathology.
  • 学位 M.S.
  • 年度 2006
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 土壤学;植物病理学;
  • 关键词

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