Rumex crispus (curled dock) and Rumex obtusifolius (broad leaved dock) are among the most problematic temperate zone perennial weeds of arable crops, abundant in a wide variety of conditions. Their root fragments, created during routine agricultural practices, are known to regenerate. Regeneration from two fragment weights and from different parts of the upper root and taproot was measured and compared between the species, in a winter field trial. A second field trial, which spanned winter into the following late spring, considered the effects of increasing the planting depths of root fragments. Biometric measures in both trials were above ground dry weight, leaf area, the number of shoots produced and below ground root fresh weight. From the first trial, total emergence was low in both species (31% in R. crispus and 37.5% in R. obtusifolius), tailed off quickly and only occurred from the upper or mid-root sections, with significant differences in emergence between species and the root fragment section, but not fragment starting sizes. The likelihood of plants emerging was significantly higher in R. obtusifolius and from the top root fragment section, growth from the root mid-section only occurred in R. obtusifolius. Root fragment starting weight made no significant difference. Rumex obtusifolius produced significantly less above ground dry weight, leaf area and shoots than R. crispus. More shoots were produced from larger root fragments in both species. In the winter to early summer trial both species showed weak early regeneration, which quickly tailed off, with R. crispus emerging in significantly greater numbers than R. obtusifolius. Notably, emergence resumed strongly the following spring-early summer in both species. Increasing soil depth was related to a significant decrease in emergence and impacted on all biometrics similarly, except fresh root weight which increased at moderate planting depths before tailing off. These findings confirm the potential for vegetative regeneration of both species, contribute to our understanding of factors influencing their regrowth and highlight key differences between them which can be used to improve control practices.

Rumex crispus（卷曲码头）和Rumex obtusifolius（阔叶码头）是温带地区最有问题的可耕作物多年生杂草，在各种条件下都丰富。它们的根碎片是在常规农业实践中产生的，已知会再生。在冬季田间试验中，测量了两个碎片的重量以及上根和主根的不同部分的再生，并比较了两个物种之间的再生。第二个田间试验涵盖了冬天到下一个春末，该试验考虑了增加根部碎片播种深度的影响。两项试验中的生物测定指标均高于地面干重，叶面积，产生的芽数和低于地面根鲜重。从第一次试验开始，两个物种的总出苗率都较低（R. crispus中为31％，obtusifolius为37.5％）），迅速消失，仅在上或中根部分出现，物种和根片段部分之间出现显着差异，但片段起始大小没有差异。钝齿R. obtusifolius中出现植物的可能性显着更高，并且从顶部根部片段开始，仅从根中部开始生长在obtusifolius中。根碎片起始重量无明显差异。Rumex obtusifolius在地面上的干重，叶面积和枝条上的产量明显低于R. crispus。在这两个物种中，更大的根部片段都产生了更多的芽。在冬季至夏季初的试验中，两种物种的早期再生能力都很弱，很快就消失了，R. crispus出现的数量远多于obtusifolius。值得注意的是，两个物种在第二个春季至初夏的强烈恢复了出苗。土壤深度的增加与出苗率的显着下降有关，并且对所有生物特征的影响均相似，不同之处在于新鲜的根重在追尾前在中等种植深度下会增加。这些发现证实了两个物种营养再生的潜力，有助于我们理解影响其再生的因素，并突出了它们之间的关键差异，可用于改善控制措施。