论文部分内容阅读
因家禽褥草中所含的荷尔蒙对鱼或其它动物的健康和生殖能力有不良影响，就草滤带对分布有家禽褥草草地的径流中荷尔蒙（雌二醇—１７β）传输的影响进行了研究。其目的是确定褥草散布长度和草滤带长度对径流中雌二醇—１７β的浓度和损失的影响，褥草以５ｔ／ｈｍ２在总长为２４４ｍ的小区上端分别散布成６１、１２２和１８３ｍ的草带，并假定其下边缘无草滤带。为了对雌二醇—１７β进行分析，采用了５０ｍｍ／ｈ的人工降水以产生径流样本。结果发现褥草分布长度对径流中荷尔蒙的浓度及损失影响不大，平均分别为３５μｇ／Ｌ和１４１３ｇ／ｈｍ２。但是，长度分别为６１、１２２、１８３ｍ的草滤带可分别使径流中的荷尔蒙浓度降低５８％、８１％和９４％，并减少７９％、９０％和９８％的含量。这些数据说明草滤带的确具有降低径流中雌二醇—１７β含量的作用。
The effects of grass belt on the transport of hormones (estradiol-17β) in runoff from poultry litter pastures were affected by the hormones contained in the litter, which negatively affected the health and reproductive capacity of fish or other animals the study. The purpose of this study was to determine the effects of the litter size and the length of the grass belt on the concentration and loss of estradiol-17β in the runoff. The litter was spread to 6 1 at 5 t / hm2 over the upper 24 4 m. 12 2 and 18 3m grass belt, and assumes that the lower edge of grass-free filter belt. For analysis of estradiol-17β, 50 mm / h artificial precipitation was used to generate run-off samples. The results showed that the litter size had little effect on the concentration and loss of hormones in the runoff, with an average of 35μg / L and 1413g / hm2, respectively. However, grass strands with lengths of 6 1, 12 2 and 18 3 m decreased the concentrations of hormones in runoff by 58%, 81% and 94%, respectively, and decreased the contents of 79%, 90% and 98% . These data suggest that grass strands do indeed have the effect of reducing estradiol-17 [beta] content in runoff.