Biomass from forestry is one of the largest components of Sweden’s renewable resources. Poplars are currently the highest producing tree species available and are therefore natural choices for biomass-oriented production. Growing poplars has been of most interest on agricultural land, but the knowledge and experience about their cultivation is still limited. Factors that have a large impact on the regeneration results are plant material, competing vegetation, browsing and damage caused by voles or climatic factors. Due to large establishment costs, there is a need to find methods to secure the establishment both biologically and economically. In this study the effect of plastic mulch in combination with three different plant types (short cuttings, long cuttings and rooted plants) were tested at three different sites. Five years after planting, the overall effect of mulch was an improved plant survival and growth. In most cases, long cuttings outperformed short cuttings and rooted plants. Clonal differences were present, indicating the importance of using plant material adapted to site conditions. All sites were heavily affected by browsing and during the experimental period 100% of the plants were damaged at some point. Planting poplars without fencing is therefore doubtful. Results from this study conclude that poplars can be established with success on agricultural land if proper measures are used depending on the site to be planted.

中文翻译：

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在瑞典的农田上建立杨树的策略，包括覆盖和植物类型。

林业产生的生物质是瑞典可再生资源的最大组成部分之一。杨树是目前可用的产量最高的树种，因此是面向生物质生产的自然选择。杨树在农业用地上一直是最受关注的，但是有关其种植的知识和经验仍然有限。对再生结果影响很大的因素是植物材料，竞争性植被，田鼠和田鼠或气候因素造成的破坏。由于建立成本高昂，因此需要寻找一种方法来从生物学和经济上确保该建立。在这项研究中，在三个不同的地点测试了塑料覆盖物与三种不同植物类型（短插枝，长插枝和生根植物）的结合效果。种植五年后，覆盖的总体效果是改善了植物的存活和生长。在大多数情况下，长插条优于短插条和生根的植物。存在克隆差异，表明使用适合现场条件的植物材料的重要性。所有站点都受到浏览的严重影响，在实验期间，100％的植物在某个时候受到了破坏。因此种植没有栅栏的杨树值得怀疑。这项研究的结果得出结论，如果根据种植地点采取适当措施，可以在农业用地上成功建立杨树。所有站点都受到浏览的严重影响，在实验期间，100％的植物在某个时候受到了破坏。因此种植没有栅栏的杨树值得怀疑。这项研究的结果得出结论，如果根据种植地点采取适当措施，可以在农业用地上成功建立杨树。所有站点都受到浏览的严重影响，并且在实验期间100％的植物在某个时候受到了破坏。因此种植没有栅栏的杨树值得怀疑。这项研究的结果得出结论，如果根据种植地点采取适当措施，可以在农业用地上成功建立杨树。