耕作控制多年生杂草，比如伊拉修斯，部分原因是它破坏了他们的地下存储器官。然而,耕作很难与生长的作物结合，这限制了它的应用。这项研究的目的是评估以最小的土壤干扰和割草方式进行土壤垂直切割如何影响草三叶草作物中白杨的生长和竞争能力。使用拖拉机绘制的带有垂直圆盘的原型将E.repens根茎碎片化，土壤和作物干扰最小。在2014年和2015年在乌普萨拉附近的现场进行的实验中，瑞典,根茎在作物播种(ERF)之前被碎片化，在作物生长期间(LRF)，或两者(ERF+LRF)。碎裂与重复割草(是/否)和四种伴随作物处理(无，意大利黑麦草,白三叶草,和草/三叶草混合物）。结果表明，在草三叶草作物中，根茎破碎降低了根茎生物量的产量，并增加了意大利黑麦草的芽生物量。与对照相比，ERF和LRF都减少了约38％的根茎生物量，而ERF+LRF降低了63%。通过ERF，意大利黑麦草芽生物量增加了78％，LRF为170%，ERF+LRF为200%。在整个实验中重复割草减少了约75%。与单独割草相比，将重复割草与根茎破碎相结合并没有显着提高防治效果。我们得出的结论是，在播种前和作物生长过程中都可以使用垂直圆盘进行根茎破碎，以增强草三叶草作物对白杨的控制作用。
Tillage controls perennial weeds, such as Elymus repens, partly because it fragments their underground storage organs. However, tillage is difficult to combine with a growing crop, which limits its application. The aim of this study was to evaluate how soil vertical cutting with minimum soil disturbance and mowing affect the growth and competitive ability of E. repens in a grass-clover crop. A tractor-drawn prototype with vertical disks was used to fragment E. repens rhizomes with minimal soil and crop disturbance. In experiments performed in 2014 and 2015 at a field site close to Uppsala, Sweden, the rhizomes were fragmented before crop sowing (ERF), during crop growth (LRF), or both (ERF+LRF). Fragmentation was combined with repeated mowing (yes/no) and four companion crop treatments (none, Italian ryegrass, white clover, and grass/clover mixture). The results showed that in the grass-clover crop, rhizome fragmentation reduced E. repens rhizome biomass production and increased Italian ryegrass shoot biomass. ERF and LRF both reduced E. repens rhizome biomass by about 38% compared with the control, while ERF+LRF reduced it by 63%. Italian ryegrass shoot biomass was increased by 78% by ERF, 170% by LRF and 200% by ERF+LRF. Repeated mowing throughout the experiment reduced E. repens rhizome biomass by about 75%. Combining repeated mowing with rhizome fragmentation did not significantly increase the control effect compared to mowing alone. We concluded that rhizome fragmentation using vertical disks can be used both before sowing and during crop growth to enhance the controlling effect of grass-clover crops on E. repens.
PDF(Pubmed)