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首页> 外文期刊>Australian Journal of Crop Science >Growth and physiology of yarrow species Achillea millefolium cv. Cerise Queen and Achillea filipendulina cv. Parker Gold at optimum and limited moisture
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Growth and physiology of yarrow species Achillea millefolium cv. Cerise Queen and Achillea filipendulina cv. Parker Gold at optimum and limited moisture

机译：草物种Achillea millefolium cv的生长和生理。 Cerise Queen和Achillea filipendulina简历。派克金具有最佳水分含量

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Appropriate management of a limited water supply would be an effective tool to reduce production costs, minimize nutrient leaching, and conserve water. Yarrow is considered a high value herbaceous perennial for landscape in United States, and have solid, mat- forming rhizome/root system with fine feathery leaves which make it drought resistant. However, little information quantifies the physiological performance of yarrow species under limited moisture and recovery from drought. Two yarrow species (Achillea millefolium cv Cerise Queen and Achillea filipendulina cv Parker Gold) plants were subjected to four irrigation intervals: irrigated daily (control), 3, 6 and 9 days under greenhouse conditions in 2004 and 2005. Irrespective of the species, the plants exposed to drought had lower predawn leaf water potential (ψpd), stomatal conductance (Sc), transpiration rate (Ts), cell osmotic potential ( ψ s), and relative water content (RWC) than controls. Leaf area (LA), leaf weight (LW) and root weight (RW) of the controls were over twice that of plants irrigated every 9 days in 2004 and over four times as high in 2005. Leaf area ratio (LAR) was lowest in the control and increased with each level of drought stress. Root-to-shoot dry weight ratio (RSR) of the control was highest and decreased with each stress level and lowest RSR was observed for plants irrigated every 9 days. Drought did not affect net assimilation rate (NAR). In both years, relative growth rate (RGR) of the control was twice as high as plants irrigated every 9 days. Both species performed better in irrigated conditions compared with drought stress. However, the production of larger leaf area (3209 cm2) heavier leaves (35.99 g) and better osmotic adjustment by the Cerise Queen specie in response to drought enabled it to deposit more solute and lowered leaf water potential without dehydration than Parker Gold, and thus may be grown successfully on limited moisture.
机译：适当管理有限的供水将是降低生产成本，最大程度减少养分浸出并节约用水的有效工具。 arrow草在美国被认为是高价值的多年生草本植物，具有坚实的，形成垫层的根茎/根系，细小的羽毛状叶片，使其耐旱。但是，很少有信息可以量化moisture草在有限水分和干旱恢复下的生理性能。在2004年和2005年的温室条件下，分别对两种species草物种（Achillea millefolium cv Cerise Queen和Achillea filipendulina cv Parker Gold）进行了四个灌溉间隔：每天（对照），3、6和9天灌溉。遭受干旱的植物比对照具有较低的黎明前叶片水势（ψpd），气孔导度（Sc），蒸腾速率（Ts），细胞渗透势（ψs）和相对含水量（RWC）。对照的叶面积（LA），叶重（LW）和根重（RW）是2004年每9天灌溉植物的两倍以上，是2005年的四倍。叶面积比（LAR）最低随着干旱胁迫程度的增加，其控制和增加。对照的根茎干重比（RSR）随胁迫水平的升高而最高，而每9天灌溉的植物的RSR最低。干旱不影响净同化率（NAR）。在这两年中，对照的相对生长率（RGR）都是每9天灌溉一次的植物的两倍。与干旱胁迫相比，这两个物种在灌溉条件下均表现更好。但是，比起Parker Gold，更大的叶子面积（3209 cm2），较重的叶子（35.99 g）的产生以及Cerise Queen品种对干旱的渗透调节效果更好，使其能够在不脱水的情况下沉积更多的溶质并降低叶片水势而不会脱水，因此可以在有限的水分下成功生长。

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