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首页> 外文期刊>Nitrogen >Optimizing N Fertilization for Increasing Yield and Profits of Rainfed Maize Grown under Sandy Loam Soil
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Optimizing N Fertilization for Increasing Yield and Profits of Rainfed Maize Grown under Sandy Loam Soil

机译：在砂土土壤下雨水玉米生长的升高产量和利润优化N施肥

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摘要

The optimum dose of fertilizers for crops varies with soil, agro-ecology, and crop management practices. Optimizing application dose is critical to reduce nutrient loss to the environment and increase nitrogen use efficiency (NUE), crop yields, and economic return to farmers. An experiment was conducted to determine the optimum N dose for increasing maize (Zea mays L. cv, Manakamana-3) yield, NUE, and farm profits under rainfed conditions. Five levels of N (0, 60, 120, 180, and 240 kg ha?1), and a non-fertilized treatment were tested in a randomized complete block design with three replications. Effects of each treatment on yield and yield attributing traits, plant lodging and Sterility (plants with no cob or grain formation), NUE, and stay green trait of maize were recorded. Application of N above 120 kg ha?1 (N120) did not have any significant effects on yield and yield components. Nitrogen, at N120 and above, produced highly fertile plants (though sterility slightly increased at N180 and N240), higher N uptake, and lower dead leaf area (18–27%). N120 produced the highest agronomic; yield increase per unit of N application (AEN—26.89 kg grain kg?1 N) and physiological efficiency of N (PEN—42.67 kg grain kg?1 N uptake), and net benefit (USD 500.43). Considering agronomic, economic, and NUE factors, an N dose of 120 kg ha?1 was found optimum for the cultivation of rainfed maize (Manakamana-3) under sandy loam soil.
机译：农作物的最佳剂量肥料因土壤，农业生态和作物管理实践而异。优化应用剂量对于减少环境的养分丧失并增加氮气利用效率（NUE），作物产量和经济回报，至关重要。进行了一个实验以确定雨量条件下增加玉米（Zea 5月L. CV，Manakamana-3）产量，NUE和农业利润的最佳N剂量。在随机完全块设计中测试了五种水平的N（0,60,120,180和240kg HA？1），并在随机完全块设计中进行了三种复制。记录每种治疗对产量和产量的影响，植物住宿和无菌（Nue植物或谷物或谷物形成的植物），NUE和玉米保持绿色特质。在120kg ha = 1（n120）以上的施用对产率和产量组分没有任何显着影响。在N120及以上的氮气产生高度肥沃的植物（尽管在N180和N240略微增加，但较高的N吸收和下死叶面积（18-27％）。 N120产生了最高的农艺;产量增加N施用（AEN-26.89 kgα1N）和N的生理效率（PEN-42.67 kgβ1nα1n吸收），净利润（500.43美元）。考虑到农艺，经济和纽约因素，为120公斤HA的N剂量为120公斤，为桑迪壤土土壤中的雨水（Manakamana-3）培养最佳。

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