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首页> 外文期刊>Australian Journal of Crop Science >Solute distribution uniformity and fertilizer losses under meandering and standard furrow irrigation methods
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Solute distribution uniformity and fertilizer losses under meandering and standard furrow irrigation methods

机译：弯曲和标准沟灌方法下的溶质分布均匀性和肥料损失

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Surface fertigation is a cost-effective and simple method of applying fertilizer if well-managed and designed. Surface irrigation in sloping fields has some difficulties, especially when soil is not deep enough for adequate leveling. In these fields, fertigation may result in contamination of surface waters due to runoff. The purpose of this study was to examine the effects of meandering furrow irrigation and field slope on the hydraulic parameters (advance time, recession time, water depth and runoff), distribution uniformities and application efficiency of water and fertilizer. A field experiment was conducted to evaluate the effect of field slope (1.1 and 2.9%) and furrow type (meandering furrow (MF) and standard furrow (SF) irrigation on hydraulic performance and efficiencies of irrigation and fertigation. Results indicated that application efficiency and advance time in MF irrigation were significantly more than SF irrigation (P<0.05) for both irrigation events. The average tail water runoff loss and consequently mass of fertilizer loss in MFs (718 L, 206 gr) were significantly (P< 0.05) less than SFs (1304 L, 399 gr), which could result in less surface water contamination. The average low quarter distribution uniformity (DULQ) and low half distribution uniformity (DULH) of water and fertilizer were high (almost 90%) for both irrigation methods. In general, the use of MF irrigation in sloping fields is recommended as a good management option for both irrigation and fertigation.
机译：如果管理和设计合理，表面施肥是一种经济有效的简单施肥方法。坡地的地面灌溉存在一些困难，尤其是在土壤深度不足以进行充分整平的情况下。在这些领域中，施肥可能会因径流而导致地表水污染。这项研究的目的是研究蜿蜒的沟渠灌溉和田间坡度对水力参数（前进时间，后退时间，水深和径流），水肥分配均匀性和施用效率的影响。进行了田间试验，评估了田间坡度（1.1％和2.9％）和犁沟类型（曲沟犁（MF）和标准犁沟（SF）灌溉）对水力性能以及灌溉和施肥效率的影响。两种灌溉方式中，MF灌溉的提前时间均显着大于SF灌溉（P <0.05），MFs的平均尾水径流损失和肥料损失量（718 L，206 gr）显着降低（P <0.05）相比SFs（1304 L，399 gr），可以减少地表水污染。两种灌溉方式的水和肥料的平均低四分之一分布均匀度（DULQ）和低半分布均匀性（DULH）高（几乎90％）通常，建议在坡地上使用中频灌溉作为灌溉和施肥的良好管理选择。

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