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Water Management for Tomato Part II

机译:番茄水管理第二部分

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Irrigation systems are generally rated with respect to application efficiency (Ea), which is the fraction of the water that has been applied by the irrigation system and that is available to the plant for use. In general, Ea is 20 to 70 percent for seepage irrigation and 90 to 95 percent for drip irrigation. Applied water that is not available to the plant may have been lost from the crop root zone through evaporation, leaks in the pipe system, surface runoff, subsurface runoff, or deep percolation within the irrigated area. When dual drip/seepage irrigation systems are used, the contribution of the seepage system needs to be subtracted from the tomato irrigation requirement to calculate the drip irrigation need. Otherwise, excessive water volume will be systematically applied. Tomato irrigation requirement are determined by dividing the desired amount of water to provide to the plant (ETc), by Ea as a decimal fraction (Eq. [3]).
机译:灌溉系统通常根据施用效率(Ea)进行评级,施用效率是灌溉系统已施用的水量,可供工厂使用。通常,渗流灌溉的Ea为20%至70%,滴灌灌溉的Ea为90%至95%。植物无法获得的施用水可能因蒸发,管道系统泄漏,地表径流,地下径流或灌溉区域内的深层渗滤而从作物根部区域流失了。当使用双滴灌/渗灌系统时,需要从番茄灌溉需求中减去渗漏系统的贡献,以计算滴灌需求。否则,将系统地应用过多的水量。通过将提供给植物的所需水量(ETc)除以作为小数部分的Ea来确定番茄灌溉需求(公式[3])。

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    《The Tomato Magazine》 |2012年第2期|共4页
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