Matric potential-based irrigation management of field-grown strawberry: Effects on yield and water use efficiency
Matric potential-based irrigation management of field-grown strawberry: Effects on yield and water use efficiency
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DOI：
10.1016/j.agwat.2015.07.005
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发表时间：
2015-11-01
影响因子：
6.7
通讯作者：
Cormier, J.
中科院分区：
文献类型：
--
作者：
Letourneau, Guillaume;Caron, J.;Cormier, J.
有效的和适应的灌溉调度标准，需要提高产量和水的利用效率（WOE），并减少与径流和淋溶的水和养分损失的环境影响。在这项研究中，田间规模的实验进行了对比的土壤和气候条件下，在四个商业草莓生产基地。在每个站点内，不同的土壤基质势为基础的灌溉阈值（IT）对产量和水分利用效率的影响进行了评估。基质潜力为基础的灌溉管理进行了比较，在每个网站的各自领域的生产者使用的共同灌溉实践。在站点1（粉质粘壤土;潮湿大陆性（Dfb）气候），-15 kPa的IT使产量提高6.2%，相对于普通灌溉实践，无需额外用水。在站点2，类似的土壤和气候条件下，灌溉处理不影响产量和基质势为基础的管理降低WOE相对于普通做法。然而，结果表明，保持土壤基质势低于-9kPa可以诱导胁迫条件的植物。现场3（桑迪壤土;结果表明，在地中海气候条件下，以-8 kPa的IT为最佳灌溉条件下，小麦产量和WOE最高，并表明通过实施高频灌溉可以进一步提高WOE。4号场地（粘壤土;结果表明，-10和-15 kPa之间的IT可以优化产量和WOE，基于基质势的灌溉相对于常规做法大大减少了根区下的淋溶。考虑到所有地点的结果，-10 kPa的IT似乎足以作为在大多数田间条件下进一步优化灌溉的起点。(C)2015年，作者。由Elsevier B. V.出版。这是一篇在CC BY-NC-ND许可下的开放获取文章
Effective and adapted criteria for irrigation scheduling are required to improve yield and water use efficiency (WOE) and reduce the environmental impacts associated with water and nutrients losses by runoff and leaching. In this study, field-scale experiments were conducted at four commercial strawberry production sites with contrasting soil and climatic conditions. Within each site, the influence of different soil matric potential-based irrigation thresholds (IT) on yield and WUE was evaluated. Matric potential-based irrigation management was also compared with common irrigation practices used by producers in each site's respective areas. At Site 1 (silty clay loam; humid continental (Dfb) climate), an IT of -15 kPa improved yields by 6.2% without any additional use of water relative to common irrigation practices. At Site 2, with similar soil and climatic conditions, the irrigation treatments did not affect yield and the matric potential-based management decreased WOE relative to common practices. However, the results suggested that maintaining the soil matric potential lower than -9 kPa could induce stressing conditions for the plants. At Site 3 (sandy loam; Mediterranean (Cs) climate), the best yield and WOE were obtained with an IT of -8 kPa and suggested that WOE could be further improved by implementing high-frequency irrigation. At Site 4 (clay loam; Mediterranean (Cs) climate), results suggested that an IT between -10 and -15 kPa could optimize yield and WOE, and matric potential-based irrigation considerably reduced leaching under the root zone relative to common practices. Considering the results from all sites, an IT of -10 kPa appears to be adequate as a starting point for further optimizing irrigation under most field conditions. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license