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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 CORN IN SOUTHEASTERN COASTAL PLAINS | Science Publications
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EVALUATION OF NITROGEN APPLICATION METHODS AND RATES WITH NUTRISPHERE-N ON CORN IN SOUTHEASTERN COASTAL PLAINS | Science Publications

机译：东南沿海平原玉米秸秆氮素施用量及氮肥施用量评价科学出版物

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> Application method of Nitrogen (N) and Nutrisphere-N may influence corn (Zea mays L.) growth and yields under dryland conditions. The objective of this study was to determine the effect of two N application methods (all at planting and split application with 35 kg N ha-1 applied at planting and remaining N at V6 stage) and five N rates (0, 45, 90, 135 and 180 kg N ha-1) with and without Nutrisphere-N polymer on dryland corn near Blackville, SC from 2010 to 2012. Compared to control, Nutrisphere-N polymer improved corn grain yield by 33.3 and 29.5% at 90 and 135 kg N ha-1 applied at planting and 12.1, 12.9, 22.0 and 31.2% at 45, 90, 135 and 180 kg N ha-1 applied in split applications, respectively. Chlorophyll improved in corn leaves by 19.3% at 8 weeks after planting with application of 45 kg N ha-1 and Nutrisphere-N at planting. Split N application with Nutrisphere-N slightly improved chlorophyll in corn leaves. Nutrisphere-N increased plant LAI at 8 weeks after planting by 10.2% at 135 kg N ha-1 in split applications and LAI at 16 weeks after planting by 50.4, 56.2, 59.4 and 70.7% at 45, 90, 135 and 180 kg N ha-1 with split applications, respectively. Plant NDVI at 16 weeks after planting corn improved with Nutrisphere-N by 9.3, 11.5, 13.0 and 9.2% with N applied at planting and 16.0, 12.9, 10.2 and 14.3% with split N applications at 45, 90, 135 and 180 kg ha-1, respectively. Nutrisphere-N increased grain N by 4.5% at 135 kg N ha-1 applied to corn at planting and 5.2% at 90 kg N ha-1 applied in split applications. Generally, N applications with Nutrisphere-N positively improved growth parameters and yields of corn.
机译： >在旱地条件下，氮和Nutrisphere-N的施用方法可能会影响玉米（Zea mays L.）的生长和产量。这项研究的目的是确定两种氮肥施用方式（全部用于种植和分批施用，在种植时施用35 kg N ha -1 并在V6阶段施用剩余氮肥）和五种氮肥施用量的效果从2010年到2012年，在南卡罗来纳州布莱克维尔附近的旱地玉米上，分别添加（0、45、90、135和180 kg N ha -1 ）有和没有Nutrisphere-N聚合物。与对照相比，Nutrisphere-N聚合物在种植时施用90和135 kg N ha -1 可使玉米籽粒产量提高33.3和29.5％，在种植45、90、135和180 kg N ha -1 分别应用于拆分应用程序。种植后45周，施用45 kg N ha -1 和Nutrisphere-N可使玉米叶片在叶生长8周后叶绿素提高19.3％。施用Nutrisphere-N的N分离处理可略微改善玉米叶片中的叶绿素。在分批施用时，Nutrisphere-N在135 kg N ha -1 下种植后8周时的植物LAI增加了10.2％，而在种植后16周时45处的LAI增加了50.4、56.2、59.4和70.7％，分别使用90、135和180 kg N ha -1 。种植玉米后16周的NDVI值得到改善，其中施用Nutrisphere-N分别提高了9.3、11.5、13.0和9.2％，种植时施用了氮，分别施用了45、90、135和180 kg ha分别施用了16.0、12.9、10.2和14.3％ -1 。在种植时，施用至玉米的135 kg N ha -1 的Nutrisphere-N使籽粒氮增加4.5％，而对于分块施用的90 kg N ha -1 ，氮肥的氮增加5.2％。通常，氮肥与氮肥配合施用可显着改善玉米的生长参数和产量。

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