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首页> 外文期刊>Experimental agriculture >THE IMPACT OF SEED PRIMING AND ROW SPACING ON THE PRODUCTIVITY OF DIFFERENT CULTIVARS OF IRRIGATED WHEAT UNDER EARLY SEASON DROUGHT
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THE IMPACT OF SEED PRIMING AND ROW SPACING ON THE PRODUCTIVITY OF DIFFERENT CULTIVARS OF IRRIGATED WHEAT UNDER EARLY SEASON DROUGHT

机译：早旱条件下播种和行距对灌溉小麦不同品种产量的影响

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摘要

This study was conducted to improve wheat production under vegetative (early season) drought stress. Hydroprimed and osmoprimed (with CaCl2) seeds of wheat cultivars Lasani-2008 (LS-2008) and Triple Dwarf-1 (TD-1), were sown in 20 (narrow), 25 (medium), and 30 cm (wider) spaced rows. Crop was grown under well-watered conditions till physiological maturity or was subjected to drought stress (50% field capacity) during vegetative phase and then grown under well-watered conditions. Drought stress caused substantial reduction in grain and biological yields, related traits, harvest index (HI) and water use efficiency (WUE). Nonetheless, planting osmoprimed seeds in narrowly spaced rows significantly improved the grain yield, HI and WUE. However, wheat planted in wider rows had bold grains. Furthermore, wheat cultivar LS-2008 produced better yield, even under drought stress, than cultivar TD-1. Economic analysis indicated that planting osmoprimed seeds of wheat cultivar LS-2008 in narrowly spaced rows under early season drought yielded maximum economic benefits. In conclusion, planting osmoprimed seeds of cultivar LS-2008 in narrowly spaced rows is a good agronomic option to improve the wheat performance under early season drought stress.
机译：进行这项研究是为了在营养干旱（早期）干旱胁迫下提高小麦产量。将Lasani-2008（LS-2008）和Triple Dwarf-1（TD-1）小麦品种的水浸和渗透浸种子（用CaCl2）播种在20（窄），25（中）和30 cm（宽）的间隔中行。作物在营养充足的季节中要在水分充足的条件下生长直至生理成熟，或者遭受干旱胁迫（50％的田间持水量），然后在水分充足的条件下生长。干旱胁迫导致谷物和生物产量，相关性状，收获指数（HI）和水分利用效率（WUE）大大降低。但是，在狭窄的行中种植渗透压种子可以显着提高谷物产量，HI和WUE。但是，种植在更宽的行中的小麦籽粒粗大。此外，即使在干旱胁迫下，LS-2008小麦品种的产量也比TD-1品种高。经济分析表明，在早期干旱期间，在狭窄行中种植LS-2008小麦品种的渗透压种子可获得最大的经济效益。综上所述，在狭窄的行中种植LS-2008品种的渗透压种子是改善小麦在早季干旱胁迫下性能的良好农艺选择。

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