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首页> 外文期刊>American journal of agricultural and biological sciences >EVALUATION OF NITROGEN APPLICATION METHODS AND RATES WITH NUTRISPHERE-N ON SOIL NITRATE-NITROGEN IN SOUTHEASTERN COASTAL PLAINS | Science Publications
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EVALUATION OF NITROGEN APPLICATION METHODS AND RATES WITH NUTRISPHERE-N ON SOIL NITRATE-NITROGEN IN SOUTHEASTERN COASTAL PLAINS | Science Publications

机译：东南沿海地区氮磷在土壤硝态氮上的施氮方法和施肥量评价科学出版物

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> Nitrogen (N) application with Nutrisphere-N polymer may affect soil Nitrate-Nitrogen (NO3-N) movement in the soil. The objective was to evaluate two N application methods (all at planting and split application) and five N rates (0, 45, 90, 135 and 180 kg N ha-1) with Nutrisphere-N polymer on soil NO3-N in dryland corn (Zea mays L.) near Blackville, SC from 2010 to 2012. Soil samples were collected from the soil depth of 90 cm and divided into 15 cm increments following corn harvest. Compared to uncoated fertilizer, Nutrisphere-N improved NO3-N concentration by 29.8% with 180 kg N ha-1 in split applications at 0-15 cm depth and by 44.7% at 90 kg N ha-1 applied at planting at 15-30 cm depth. Soil NO3-N content increased with Nutrisphere-N by 26.2, 36.1, 28.0 and 17.3% at 45 kg, 90 kg, 135 kg and 180 kg N ha-1 in split applications at 15-30 cm depth, respectively. Nutrisphere-N improved soil NO3-N concentration by 40.1 and 31.6% at 90 kg and 135 kg ha-1 over uncoated treatment for N applied in split applications at 30-45 cm depth, respectively. Soil NO3-N content improved with Nutrisphere-N by 36.9% at 135 kg N ha-1 applied at planting, while NO3-N concentration improved by 33.9 and 34.9% at 135 kg and 180 kg N ha-1 with Nutrisphere-N applied in split applications at 45-60 cm depth, respectively. At 60-75 cm depth, Nutrisphere-N decreased soil NO3-N content by 22.0% at 180 kg N ha-1 applied at planting and increased content by 37.5 and 59.9% with split N applications of 90 kg and 135 kg ha-1, respectively. Soil NO3-N concentration increased with Nutrisphere-N by 30.6% over untreated fertilizer at 135 kg N ha-1 in split applications at 75-90 cm depth. Generally, N applications with Nutrisphere-N helped to reduce soil NO3-N losses.
机译： >氮（Nutrisphere-N）聚合物对氮（N）的施用可能会影响土壤中硝态氮（NO 3 -N）的运动。目的是评估在土壤上施用Nutrisphere-N聚合物的两种氮肥施用方法（全部用于种植和分批施用）和五种氮肥施用量（0、45、90、135和180 kg N ha -1 ） 2010年至2012年，南卡罗来纳州布莱克维尔附近的旱地玉米（ L.）中的土壤NO 3 -N。从90厘米深的土壤中收集土壤样品并进行划分玉米收获后以15厘米为增量递增。与未包膜的肥料相比，Nutrisphere-N在180千克N ha -1 的分体施肥条件下（在0-15厘米深度处）将NO 3 -N浓度提高了29.8％，提高了44.7％。在15到30厘米深度种植时施用90 kg N ha -1 时的％。氮，氮分别以45 kg，90 kg，135 kg和180 kg的土壤氮 3 -N含量分别增加26.2、36.1、28.0和17.3％ha -1 分别在15至30厘米深度处分开使用。与未包膜处理的氮肥相比，Nutrisphere-N在90 kg和135 kg ha -1 分别处理30-30时，土壤NO 3 -N浓度分别提高了40.1和31.6％。深度分别为45厘米。种植时施用135 kg N ha -1 的土壤氮 3 -N含量提高了Nutrisphere-N的36.9％，而> 3 -在分别以45-60 cm深度分开施用Nutrisphere-N的情况下，在135 kg和180 kg N ha -1 下，N浓度分别提高了33.9％和34.9％。在60-75 cm的深度下，种植时施用180 kg N ha -1 的Nutrisphere-N使土壤NO 3 -N含量降低了22.0％，并增加了37.5和分别施氮90 kg和135 kg ha -1 的比例为59.9％。在135 kg N ha -1 的分applications施肥条件下，氮素氮比未处理肥料的土壤NO 3 -N浓度增加了30.6％。 -90厘米深。通常，氮肥-N施用可帮助减少土壤NO 3 -N的损失。

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