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首页> 外文期刊>Weed Technology: A journal of the Weed Science Society of America >Tolerance and Suppression of Weeds Varies among Carrot Varieties
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Tolerance and Suppression of Weeds Varies among Carrot Varieties

机译：对杂草的耐受性和抑制因胡萝卜品种而异

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Slow carrot emergence and canopy development render the crop a poor competitor with weeds. In this study, the ability to suppress weeds and maintain yield in the presence of weeds was compared among nine carrot varieties that included those selected by plant breeders for rapid vegetative canopy development compared to traditional varieties. Two weed management treatments were compared: handweeding for 21 d after carrot seeding versus handweeding for the entire carrot season. In years and locations with low to moderate weed pressure, such as in the 2014 study, differences among carrot varieties in weed competitiveness or tolerance were less apparent and therefore less relevant. Maximum carrot yield loss to weed competition among varieties was 28% in 2014. Yield loss in the presence of weeds was 15% or less with six of the nine carrot varieties. However, when weed pressure was intense in the 2015 study, both carrot plant density and carrot canopy development were inversely related to weed biomass. Carrot yield loss in the presence of weeds ranged from 38 to 87%. Despite correcting seeding populations for differences in germination among carrot varieties, carrot stand establishment varied greatly and would likely affect subsequent weed control measures such as timely cultivation or herbicide application. Future research efforts are warranted that consider carrot stand establishment factors and their relationship with integrated weed management programs.
机译：胡萝卜出苗缓慢和树冠发育使该作物成为杂草的不良竞争者。在这项研究中，比较了9个胡萝卜品种在杂草存在下抑制杂草和保持产量的能力，这些品种包括植物育种者选择的胡萝卜品种，与传统品种相比，胡萝卜树冠快速发育。比较了两种杂草管理处理：胡萝卜播种后21 d的手工除草与整个胡萝卜季节的手工除草。在杂草压力低至中等的年份和地点，例如在2014年的研究中，胡萝卜品种在杂草竞争力或耐受性方面的差异不太明显，因此相关性较低。2014年，品种间杂草竞争导致的胡萝卜产量损失最大为28%。在杂草存在的情况下，九个胡萝卜品种中有六个品种的产量损失为15%或更少。然而，在2015年的研究中，当杂草压力较大时，胡萝卜植株密度和胡萝卜冠层发育均与杂草生物量呈负相关。在杂草存在的情况下，胡萝卜产量损失在38%至87%之间。尽管对种子种群进行了校正，以消除胡萝卜品种之间发芽的差异，但胡萝卜林分的建立差异很大，可能会影响后续的杂草控制措施，例如及时栽培或施用除草剂。未来的研究工作有必要考虑胡萝卜林分的建立因素及其与综合杂草管理计划的关系。

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