Bunch compactness is an important trait that affects the sanitary status and quality of wine grapes. Many studies have demonstrated that canopy managements, such as leaf removal, shoot trimming, and postponed first shoot topping, can effectively reduce compactness. However, few studies have determined the effects of canopy management measures on bunch compactness. Shoot wrapping has been previously shown to elongate the rachis length and reduce bunch compactness. Here, we tested whether the presence of laterals affects cluster growth in Vitis vinifera L. ‘Riesling’ through a field experiment with four treatments over two consecutive seasons: shoot wrapping with laterals, shoot wrapping without laterals, hedging with laterals, and hedging without laterals. Laterals were removed weekly. Lateral removal had little effect on cluster compactness; the effect was shown temporarily and not consistent the growing seasons. The effect of laterals on cluster compactness and rachis length slightly varied with years. The short-term and variable effect of laterals may be explained by the fact that they experienced little competition with clusters.

串密度是影响酿酒葡萄卫生状况和品质的重要性状。许多研究表明，冠层管理，如摘叶、修剪枝条和推迟初梢打顶，可以有效降低紧凑度。然而，很少有研究确定冠层管理措施对束紧凑度的影响。枝条包裹先前已被证明可以延长轴长度并降低束紧度。在这里，我们测试了侧枝的存在是否会影响Vitis vinifera的集群生长L.“雷司令”通过在连续两个季节进行四种处理的田间试验：带侧枝的枝条包裹、无侧枝的枝条包裹、带枝条的对冲和无枝条的对冲。每周移除侧线。横向移除对集群紧凑度影响不大；这种影响是暂时显示的，并且与生长季节不一致。侧生对簇密实度和轴长度的影响随年份略有不同。分支机构的短期和可变影响可能是因为它们几乎没有与集群竞争。