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首页> 外文期刊>Acta Horticulturae >The effect of fertigating different levels of nitrogen, phosphorus and potassium on greenhouse cucumber yield.
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The effect of fertigating different levels of nitrogen, phosphorus and potassium on greenhouse cucumber yield.

机译：施肥不同水平的氮，磷，钾对温室黄瓜产量的影响。

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摘要

High yielding cultivars of cucumber grown in greenhouse require high amount of N, P and K. Optimum application rates of these nutrients are not available for greenhouse cucumber growers in Saudi Arabia. Greenhouse studies were conducted to determine the effects of different N, P, and K rates applied through irrigation water on cucumber yield. Three experiments were set up to study each nutrient separately. In the first experiment, N was applied at 125, 150, 175 and 200 ppm N, with a basic fertigation of 70 ppm P2O5 and 200 ppm K2O. In the second experiment, P was applied at 40, 50, 60 and 70 ppm P2O5, with 200 ppm N and 200 ppm K2O. In the third experiment, K was applied at 140, 160, 180 and 200 ppm K2O, with 200 ppm N and 70 ppm P2O5. In the N experiment, the highest yield (49.5 t/ha) was obtained at 150 ppm N with 70 ppm P2O5 and 200 ppm K2O. In the P experiment, 60 ppm P2O55 with 200 ppm N and 200 ppm K2O gave the best yield (42.0 t/ha). In the K experiment, the highest yield (33.2 t/ha) was obtained when K2O was applied at 200 ppm with 200 ppm N and 70 ppm P2O5. Corp yield increases with increasing K rates, indicating that further increase in K rates may still increase yield, whereas N and P showed a typical nutrient response curve and interaction..
机译：在温室中种植的高产黄瓜品种需要大量的N，P和K。这些营养素的最佳施用量不适用于沙特阿拉伯的温室黄瓜种植者。进行了温室研究，以确定通过灌溉水施用的不同氮，磷和钾含量对黄瓜产量的影响。建立了三个实验来分别研究每种营养素。在第一个实验中，以125、150、175和200 ppm的氮施氮，基本施肥量为70 ppm P2O5和200 ppm K2O。在第二个实验中，以200 ppm N和200 ppm K2O分别以40、50、60和70 ppm P2O5施用P。在第三个实验中，以140、160、180和200 ppm K2O施用K，同时添加200 ppm N和70 ppm P2O5。在氮实验中，在150 ppm N，70 ppm P2O5和200 ppm K2O的条件下，可获得最高产量（49.5吨/公顷）。在磷实验中，含200 ppm N和200 ppm K2O的60 ppm P2O55产生了最佳产量（42.0 t / ha）。在钾肥试验中，当以200 ppm的N和70 ppm的P2O5施用200 ppm的K2O时，可获得最高的产量（33.2 t / ha）。钾肥的施用量随钾肥施用量的增加而增加，表明钾肥施用量的进一步增加可能仍会增加产量，而氮和磷显示出典型的养分响应曲线和相互作用。

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