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首页> 外文期刊>African Journal of Biotechnology >Improving maize productivity through tillage and nitrogen management
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Improving maize productivity through tillage and nitrogen management

机译：通过耕作和氮肥管理提高玉米生产力

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Continuous cultivation of fields with same implement (cultivator) creates a hard pan in the subsoil which adversely affects crop productivity. In addition to tillage, nitrogen management is a key factor for better crop growth and yield. Impact of different tillage systems and nitrogen management on yield attributes and grain yield of hybrid maize was evaluated by conducting experiments at the Agronomic Research Area, University of Agriculture, Faisalabad during 2008 and 2009. The experiment comprised of three tillage systems viz. conventional tillage, tillage with mould board plough followed by 2-cultivations (with cultivator), tillage with chisel plough followed by 2-cultivations (with cultivator) and three nitrogen levels (100, 150 and 200 kg ha-1). Different tillage systems and nitrogen levels significantly influenced the maize yield and yield components. Chisel ploughed plots resulted to heavier cobs, higher 1000-grain weight and grain yield in comparison with other tillage systems. Maize yield with chisel tilled plots was 18 and 9% higher than mould board ploughed and conventionally tilled plots, respectively. Generally, differences between different nitrogen application rates were more pronounced; increasing nitrogen rate resulted in increased yield and yield components of maize. Significantly, highest grains weight per cob, 1000-grain weight and grain yield was recorded with 200 kg ha-1?nitrogen application. Maize yield with 200 kg ha-1?nitrogen application was 17 and 8.50% higher than 100 and 150 kg ha-1?nitrogen application, respectively. Therefore, it may be concluded that maize hybrids should be grown with 200 kg ha-1?nitrogen application by preparing the field with chisel plough followed by cultivator.
机译：用相同的工具（耕ator机）连续耕种田地会在地下土壤中形成坚硬的锅，这对作物的生产力产生不利影响。除耕作外，氮素管理是提高作物生长和产量的关键因素。通过在2008年至2009年期间在费萨拉巴德农业大学农学研究区进行试验，评估了不同耕作制度和氮肥管理对杂交玉米产量属性和籽粒产量的影响。该试验由三个耕作系统组成。常规耕作，先用模板犁耕种，再进行2个耕作（使用耕cult机），再用凿子耕作耕作，然后进行2个耕作（使用耕and机）和三个氮水平（100、150和200 kg ha-1）。不同的耕作制度和氮水平严重影响了玉米的产量和产量构成要素。与其他耕作系统相比，凿犁的地块可增加玉米穗轴的重量，增加1000粒重和谷物的产量。凿耕地的玉米产量分别比犁耕和常规耕作的玉米高18％和9％。通常，不同氮肥施用量之间的差异更为明显。增加的氮含量导致玉米的产量和产量构成要素的增加。值得注意的是，在施用200 kg ha-1？氮的情况下，记录了最高的单穗粒重，1000粒重和谷物产量。施用200 kg ha-1？氮的玉米产量分别比施用100 kg和150 kg ha-1？氮高17％和8.50％。因此，可以得出结论，通过用凿子犁先准备耕地，然后再使用中耕机，玉米杂交种应在200 kg ha-1？氮的条件下生长。

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