Water infiltration post-liquid dairy manure application in no-till Oxisol of Southern Brazil
Water infiltration post-liquid dairy manure application in no-till Oxisol of Southern Brazil
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巴西南部免耕 Oxisol 中液体奶牛粪后水渗透施用
DOI：
10.1016/j.still.2015.05.012
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发表时间：
2015
影响因子：
6.5
通讯作者：
V. Pauletti
中科院分区：
文献类型：
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作者：
V. F. Cherobim;N. Favaretto;R. A. Armindo;G. Barth;J. Dieckow;V. Pauletti
使用液体奶牛粪（LDM）是畜牧生产者的常见做法。然而，强降雨后会发生土壤、水和养分损失。本研究的目的是：i) 验证哪种渗透模型（即 Kostiakov-Lewis、Horton 或 Philip）更适合估计不同量的 LDM 施用（0、30、60 和 90 m3ha−1）后免耕土壤的最终渗透率； ii) 评估随时间推移（1、5、10、25 和 40 天）LDM 应用对渗透率的影响。 LDM 应用导致高渗透变异性。在渗透模型中，Horton 模型保持了最佳拟合。最低的最终渗透发生在 LDM 施用后 1 天，面积为 90 m3ha−1。总体而言，对于任何 LDM 剂量，间隔时间超过 5 天的渗透没有差异。根据我们的分析，我们建议在高强度降雨前至少 5 天施用最大 LDM 剂量 60 m3ha−1。该程序将最大限度地减少与径流相关污染物的环境问题。
Use of liquid dairy manure (LDM) is a common practice by livestock producers. However, soil, water and nutrient losses occur after intense rainfall. The objectives of this study were to: i) verify which infiltration model, i.e., Kostiakov–Lewis, Horton or Philip, is more appropriate to estimate final infiltration rate in a no-till soil after different amounts of LDM application (0, 30, 60 and 90 m3ha−1); and ii) evaluate the effect of LDM application on the infiltration rate over time (1, 5, 10, 25 and 40 days). LDM application resulted in high infiltration variability. Among the infiltration models, the Horton model retained the best fit. The lowest final infiltration occurred at 90 m3ha−1, 1 day post LDM application. Overall, infiltration did not differ for any LDM dosage for intervals longer than 5 days. Based on our analysis, we would recommend a maximum LDM dosage of 60 m3ha−1applied at least 5 days prior to high intensity rainfall. This procedure would minimize environmental problems with runoff associated pollutants.