Effects of Irrigation Methods on the Growth, Water Holding Capacity of Substrate and Nutrient Uptake of Lettuce, Chicory and Endive Grown in an Extensive Green Roof System
Effects of Irrigation Methods on the Growth, Water Holding Capacity of Substrate and Nutrient Uptake of Lettuce, Chicory and Endive Grown in an Extensive Green Roof System
复制标题
灌溉方法对大面积屋顶绿化系统中生菜、菊苣和菊苣生长、基质持水能力和养分吸收的影响
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Yong
中科院分区：
文献类型：
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作者：
Y. Cho;K. Choi;Yong
本研究旨在确定水库排水、灯芯灌溉和滴灌等灌溉方式对生菜（Lactuca sativa L. var. cripspa）、菊苣（Cichorium intybus L. var.）生长、基质持水能力和养分吸收的影响。 folisum Hegi) 和菊苣 (Cichorium endivia L. var. endivia) 生长在广泛的绿色屋顶系统中。在夏季和秋季进行了两次独立实验，分别提供和不提供矿质营养素。两次试验中基质持水能力大小顺序为滴灌法>灯芯灌法>蓄排水法。只有灯芯灌溉法才能在生长期间不断保持基质中的含水量。在夏季试验中，灯芯灌处理时，不仅三种蔬菜的鲜重、干重和相对生长率（RGR）最高，而且叶片的总氮（T-N）和镁（Mg）含量最高。滴灌处理时叶片中磷（P）和钾（K）含量最高。秋季试验中，三种蔬菜的地上部鲜重在滴灌处理时最高，而生菜和菊苣的地上部干重在灯芯灌处理时最高。滴灌处理时生菜和菊苣的RGR最高，灯芯灌处理时菊苣的RGR最低。在这两个实验中，水库排水处理时的干物质含量（DM）最高。灌溉处理对生菜和菊苣的光合作用、气孔导度和蒸腾速率没有影响。这些结果表明，与水库排水和滴灌相比，灯芯灌溉对于在广泛的绿色屋顶系统中种植叶类蔬菜更有效。
This study aimed to determine the effects of irrigation methods, including reservoir-drainage, wick irrigation and drip irrigation, on the growth, water holding capacity of substrate and nutrient uptake of lettuce (Lactuca sativa L. var. cripspa), chicory Cichorium intybus L. var. folisum Hegi) and endive (Cichorium endivia L. var. endivia) grown in an extensive green roof system. Two independent experiments were carried out during summer and autumn seasons with and without supplying mineral nutrients. In both experiments, the ranking of substrate water holding capacity was in the order of drip irrigation＞wick irrigation＞reservoir-drainage method. Only the wick irrigation method constantly maintained the water content in the substrate during the growing period. In the summer experiment, not only fresh and dry weights and relative growth rate (RGR) of all three vegetables, but also total nitrogen (T-N) and magnesium (Mg) contents of the leaves were the highest at the wick irrigation treatment. The contents of phosphorous (P) and potassium (K) in the leaves were the highest at the drip irrigation treatment. In the autumn experiment, shoot fresh weights of all three vegetables were the highest at the drip irrigation treatment, while shoot dry weights of lettuce and chicory were the highest at the wick irrigation treatment. The RGR of lettuce and chicory were the highest at the drip irrigation treatment, while the RGR of endive was the lowest at the wick irrigation treatment. In the both experiment, dry matter contents (DMs) were the highest at the reservoir-drainage treatment. There was no effect of irrigation treatments on the photosynthesis, stomatal conductance and transpiration rate of the lettuce and chicory. These results suggest that the wick irrigation is more efficient for growing leafy vegetables in the extensive green roof system compared to the reservoir-drainage and drip irrigation.