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首页> 外文期刊>Archives of Agronomy and Soil Science >Improving the performance of bread wheat genotypes by managing irrigation and nitrogen under semi-arid conditions
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Improving the performance of bread wheat genotypes by managing irrigation and nitrogen under semi-arid conditions

机译：通过在半干旱条件下进行灌溉和氮气来提高面包小麦基因型的性能

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摘要

Wheat (Triticum aestivum L.) productivity is generally affected by water limitation and inadequate nitrogen supply especially under semi-arid environment. The current study was conducted to determine whether the crop yield and irrigation water use efficiency (IWUE) could be manipulated through alteration of nitrogen and irrigation application. To meet the desired objectives, a two-year field study was carried out in 2013-2014 and 2014-2015, in a split-split plot arrangement with three factors i) irrigation in main plots, ii) nitrogen in sub-plots, and iii) twenty genotypes in sub-sub plots on a sandy loam soil. The analysis of variance revealed that the wheat performance was affected by genotypes and alteration of irrigation and nitrogen application with respect to IWUE and final grain yield. IWUE under water stress conditions was observed 56% higher than normal irrigated. Much higher values of IWUE under water stress indicated that the existing optimum water requirements of the crop needs to be revaluated. The regression model indicated that addition of nitrogen and irrigation patterns along with morphological traits cannot explain variation in yield related traits more than 65% under semi-arid conditions. Therefore, for better crop yields in semi-arid environment, more physiological parameters should be considered in evaluation of yield.
机译：小麦（Triticum aestivum L.）生产率通常受水限制和氮气供应不足的影响，特别是在半干旱环境下。进行目前的研究以确定是否可以通过氮气和灌溉施用来操纵作物产量和灌溉用水效率（IWUE）。为满足所需的目标，2013 - 2014年和2014-2015在2013-2014和2014-2015中进行了两年的田间研究，其在主要地块中的三个因素I）灌溉，ii）子地块中的氮气，以及III）砂土土壤中亚子地块中的二十个基因型。方差分析表明，小麦性能受基因型的影响和灌溉和氮施加的改变以及对IWUE和最终籽粒产量的影响。在水胁迫条件下观察到水分胁迫条件高于正常灌溉的56％。水分压力下的IWUE值更高表示需要重新定位作物的最佳水需求。回归模型表明，在半干旱条件下，添加氮气和灌溉模式以及形态特征不能解释产量相关性状的变化超过65％。因此，为了更好地在半干旱环境中产生的产量，应在评估产量时考虑更多的生理参数。

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