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首页> 外文期刊>International Journal of Poultry Sciences >Mid-Flock and Post-Harvest Spatial Characterization of Broiler Litter Gas Flux and Nutrients
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Mid-Flock and Post-Harvest Spatial Characterization of Broiler Litter Gas Flux and Nutrients

机译：肉鸡垃圾气体通量和养分的中旬和收获后空间特征

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The purpose of this work was to quantify the spatial variability of litter surface gas flux of NH3, N2O and CO2 while making concurrent measurements of litter temperature and assessing litter moisture content , pH, total N and total C from laboratory analyses. Two U.S. commercial broiler houses were intensively sampled along a grid for litter properties and gas flux on a farm in Mississippi (humid subtropical climate) where the original bedding material was pine wood shavings. Before chicks were placed, the average gas flux from both houses was: 156 mg NH3/m2/h, 4.4 mg N2O/m2/h and 6440 mg CO2/m2/h. At mid-flock and after birds were harvested, pooled values from 44 locations resulted in: 260 mg NH3/m2/h, 13.1 mg N2O/m2/h and 13100 mg CO2/m2/h and 351 mg NH3/m2/h, 15.1 mg N2O/m2/h and 18400 mg CO2/m2/h, respectively. A greater degree of data variability resulted from measurements over time rather than between the houses. A good example is greater litter moisture near sidewalls during the post harvest measurement. All parameters were depicted as color contour plots; upper extremes for gas flux occurred between feeders and waterers. Tabular values cannot convey the complexity of litter surface characteristics and relationships. The efficacy of the data will be best derived by the user?s goal for improving bird productivity and management.
机译：这项工作的目的是量化垫料表面NH3，N2O和CO2的气体通量的空间变异性，同时对垫料温度进行同时测量，并通过实验室分析评估垫料含水量，pH，总氮和总碳。在密西西比州（亚热带湿润气候）的一个农场上，沿着网格对两个美国商业肉鸡场进行了密集采样，以了解其垫料属性和气体通量，该垫层的原始材料是松木刨花。在放置雏鸡之前，两个鸡舍的平均气体通量分别为：156 mg NH3 / m2 / h，4.4 mg N2O / m2 / h和6440 mg CO2 / m2 / h。在羊群中期和收获鸟类之后，来自44个地点的汇总值产生了：260 mg NH3 / m2 / h，13.1 mg N2O / m2 / h和13100 mg CO2 / m2 / h和351 mg NH3 / m2 / h， 15.1 mg N2O / m2 / h和18400 mg CO2 / m2 / h。随时间推移而不是在房屋之间进行测量会导致更大程度的数据可变性。一个很好的例子是收获后测量期间侧壁附近的垫料水分更大。所有参数均以颜色轮廓图表示;馈线和饮水器之间发生了气体通量的上限。表格值无法传达垃圾表面特征和关系的复杂性。数据的有效性将通过用户提高禽类生产力和管理水平的目标来最好地得出。

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