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首页> 外文期刊>Applied Engineering in Agriculture >CROP YIELD SUMMARY FOR THREE WETLAND RESERVOIR SUBIRRIGATION SYSTEMS IN NORTHWEST OHIO
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CROP YIELD SUMMARY FOR THREE WETLAND RESERVOIR SUBIRRIGATION SYSTEMS IN NORTHWEST OHIO

机译：西北俄亥俄州三个湿地水库次灌系统的作物收成概要

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摘要

Wetland Reservoir Subirrigation Systems (WRSIS) are innovative agricultural water management and recycling systems comprised of three main components; a constructed wetland, a water storage reservoir, and cropland containing subsurface drainage pipe systems. Surface runoff and subsurface drainage from cropland are diverted to a constructed treatment wetland to partially remove nutrients and suspended sediment. Water from the wetland is then routed to a storage reservoir and held there until needed during the growing season for subirrigation. With subirrigation, water from the reservoir is added directly to some of the cropland subsurface drainage pipe systems in order to irrigate the crops through the root zone. Three WRSIS were installed in northwest Ohio; within Defiance, Fulton, and Van Wert Counties. These three sites were operated and monitored from 1996 through 2008. Potential WRSIS benefits included: (1) reduced offsite release of nitrogen nutrients and suspended sediment, (2) additional wetland vegetation and wildlife habitat, and (3) enhanced crop yields. With respect to crop production at all three sites combined, the subirrigated fields within WRSIS, as compared to fields with conventional, unrestricted subsurface drainage, were found to have respectively larger corn (Zea mays) and soybean (Glycine max) yields of 28.7% and 25.2% during dry growing seasons, 14.1% and 6.9% during near average or wet growing seasons, and 19.1% and 12.1% overall. Subirrigated field crop yield results varied between sites with the greatest corn and soybean production increases found at the Fulton County WRSIS, followed by the Van Wert County WRSIS, then the Defiance County WRSIS. At the Defiance County WRSIS, which had high clay content, low hydraulic conductivity soils, a shorter subirrigated field drain line spacing distance (half of what is typical) was found to improve the yield of corn, but not soybeans. This study indicates that WRSIS can provide significant crop yield benefits, especially during dry growing seasons.
机译：湿地水库灌溉系统（WRSIS）是创新的农业用水管理和循环利用系统，由三个主要部分组成;人工湿地，蓄水库和包含地下排水管系统的农田。农田的地表径流和地下排水被转移至人工处理的湿地，以部分去除养分和悬浮的沉积物。然后，将湿地中的水输送到蓄水池，并保持在那里，直到生长季节需要进行地下灌溉为止。进行次灌溉时，来自水库的水被直接添加到一些农田地下排水管系统中，以便通过根部区域灌溉农作物。在俄亥俄州西北部安装了三个WRSIS;在反抗，富尔顿和范沃特县范围内。从1996年到2008年，对这三个站点进行了操作和监视。WRSIS的潜在好处包括：（1）减少氮素养分和悬浮沉积物的异地释放;（2）湿地植被和野生动植物栖息地的增加;以及（3）作物产量的提高。关于所有三个地点的作物产量，与常规的，不受限制的地下排水相比，WRSIS的地下灌溉田的玉米（Zea mays）和大豆（Glycine max）的产量分别为28.7％和在干旱的生长季节中为25.2％，在接近平均水平或潮湿的生长季节中为14.1％和6.9％，总体而言为19.1％和12.1％。在富尔顿县WRSIS中发现的玉米和大豆产量增幅最大的地区之间，地下灌溉田间作物的产量结果各不相同，其次是范沃特县WRSIS，然后是反抗县WRSIS。在具有高粘土含量，低水力传导性土壤的德菲斯县西澳大利亚州立大学，发现更短的地下灌溉排水管间距距离（典型值的一半）可以提高玉米的产量，但不能提高大豆的产量。这项研究表明，WRSIS可以显着提高作物产量，特别是在干旱的生长季节。

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