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首页> 外文期刊>Zeitschrift fur Bewasserungswirtschaft >Effect of subirrigation on the growth of Norway spruce container seedlings in a greenhouse: A pilot study
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Effect of subirrigation on the growth of Norway spruce container seedlings in a greenhouse: A pilot study

机译：地下灌溉对挪威云杉容器幼苗生长的影响：一项初步研究

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Overhead irrigation is most commonly used in greenhouse production. However, subirrigation has many advantages with respect to irrigation from above such as even wetting in a growth medium and reduced surface wetness. So far, subirrigation has not been applied on a larger scale to the container seedling growing of forest trees. In this study, subirrigation of first-year Norway spruce (Picea abies L. Karst.) seedlings growing in ordinary side-slot plastic containers (height 73 mm) filled with light peat was compared with irrigation from above. Irrigation from above (i) and by submersion (ii) (duration 2 minutes) was conducted 1-2 times per week (mean matric potential -91.2 and -30.7hPa), while constant subirrigation (iii) was maintained with 1 cm water table beneath the seedling containers (-1.9 hPa). Irrigation by submersion and from above produced the tallest and most vigorous seedlings and with least height variation, which suggests that submersion or ebb-and-flow irrigation methods are applicable for practical tree seedling growing. Seedlings grown with constant subirrigation performed worst owing to waterlogging. However, a lower water table combined with taller containers or different growth media than those used here may induce better seedling performance, which merits further study in the future.
机译：架空灌溉最常用于温室生产。然而，就从上方灌溉而言，次灌溉具有许多优点，例如即使在生长介质中润湿也可以降低表面湿度。迄今为止，还没有将灌溉技术大规模地应用于林木的容器育苗。在这项研究中，将第一年生的挪威云杉（Picea abies L. Karst。）幼苗在普通侧槽塑料容器（高度73毫米）中装满轻质泥炭的亚灌溉与上方灌溉进行了比较。每周进行1-2次以上（i）和浸入式（ii）的灌溉（持续2分钟）（平均基质势-91.2和-30.7hPa），同时用1 cm的地下水位保持恒定的灌溉（iii）幼苗容器下方（-1.9 hPa）。通过浸没和上方灌溉可以产生最高，最旺盛的幼苗，并且高度变化最小，这表明浸没或潮流灌溉方法适用于实际的树木幼苗生长。持续灌溉的幼苗由于水涝而表现最差。然而，与此处使用的相比，较低的地下水位加上较高的容器或不同的生长培养基可能会带来更好的幼苗性能，这值得在未来进行进一步研究。

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