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首页> 外文期刊>Water Quality Research Journal of Canada >Timing of Nitrate Leaching from Turfgrass after Multiple Fertilizer Applications
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Timing of Nitrate Leaching from Turfgrass after Multiple Fertilizer Applications

机译：施用多种肥料后草坪草中硝酸盐浸出的时机

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摘要

The leaching of nitrogen from surface-applied fertilzer groundwater is an environmental concern. Nitrogen fertilizer is routinely applied to turfgrass from sping to late autumn in Canada. The main objective of this study was to determine the contribution of N applied in May, July and September to leaching. The leaching of applied chloride (May and September only) was also monitored and the transport of nitrate and chloride were simulated using the model LEACHM (within EXPRES) to assist in fulfilling the main objective. The accuracy of the model simultion for transport, not nitrogen losses, was also addressed. Field lysimeters (Guelph, Ontario) were packed with a three-horizon profile of a sandy loam soil, topped with Kentucky bluegrass (Poa pratensis) sod and monitored for 1 year.
机译：从表面施肥的地下水中浸出氮是环境问题。在加拿大，从春季到深秋，通常在草坪草上施氮肥。这项研究的主要目的是确定5月，7月和9月施氮对浸出的贡献。还监控了施用的氯化物（仅在五月和九月）的浸出，并使用LEACHM模型（在EXPRES内）模拟了硝酸盐和氯化物的运输，以帮助实现主要目标。还讨论了模型simultion运输的准确性，而不是氮的损失。野外测渗仪（安大略省居尔夫）装满了三水平的沙壤土，上面放有肯塔基州的蓝草（Poa pratensis）草皮，并监测了1年。

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