Effect of Soil Water Potential Threshold for Irrigation on Cranberry Yield and Water Productivity
Effect of Soil Water Potential Threshold for Irrigation on Cranberry Yield and Water Productivity
复制标题
灌溉土壤水势阈值对蔓越莓产量和水分生产率的影响
DOI：
10.13031/trans.56.10374
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Caron
中科院分区：
文献类型：
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作者：
V. Pelletier;J. Gallichand;J. Caron
摘要。随着蔓越莓行业实现灌溉自动化，缺乏基于土壤湿度实时监测的阈值启动灌溉。本研究旨在确定启动喷灌（SWP I）的最佳土壤水势，从而在不降低产量的情况下优化水分生产力（WP）。在2011年和2012年的生长季节，QuA©bec的三个站点和威斯康星州的一个站点安装了张力计、流量计和气象站，用于测试湿处理（-5.5 kPa）、干处理（-7.0至-10.0 kPa）和对照处理（-6.0至-6.5 kPa）。试验设计旨在评估灌溉处理对产量和WP的影响。干处理比对照处理需水量减少21% ~ 93%；湿法处理需水量比对照处理多54% ~ 186%。当SWP I值为-5.5 ~ -8.0 kPa时，灌溉处理对产量无显著影响；然而，当SWP I值为-10.0 kPa时，观察到产量显著降低11%。干处理的WP值始终高于对照和湿处理。当SWP I为-7.0 ~ -8.0 kPa时，在不降低产量的情况下显著提高了水分生产力。
Abstract. As the cranberry industry implements irrigation automation, thresholding based on real-time monitoring of soil moisture to initiate irrigation is lacking. This study was conducted to determine the optimum soil water potential for starting sprinkler irrigation (SWP I ) that would optimize water productivity (WP) without decreasing yield. During the 2011 and 2012 growing seasons, three sites in QuA©bec and one site in Wisconsin were equipped with tensiometers, flowmeters, and weather stations for testing wet (-5.5 kPa), dry (-7.0 to -10.0 kPa), and control (-6.0 to -6.5 kPa) treatments. The experimental designs were developed to evaluate the impact of irrigation treatments on yield and WP. Dry treatments required 21% to 93% less irrigation water than the control treatments; wet treatments needed 54% to 186% more irrigation water than the control treatments. Irrigation treatments had no significant effect on yield when SWP I values ranged from -5.5 to -8.0 kPa; however, a significant yield reduction of 11% was observed for a SWP I value of -10.0 kPa. The WP values in dry treatments were always higher than those in control and wet treatments. Dry treatments, with SWP I ranging from -7.0 to -8.0 kPa, significantly improved the water productivity without decreasing yield.