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Moderate pollination limitation in some entomophilous crops of Europe
Agriculture, Ecosystems & Environment ( IF 6.6 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.agee.2020.107002
John M. Holland , Louis Sutter , Matthias Albrecht , Philippe Jeanneret , Sonja C. Pfister , Jens Schirmel , Martin H. Entling , Riina Kaasik , Gabriella Kovacs , Eve Veromann , Agustín M. Bartual , Simone Marini , Anna-Camilla Moonen , Márk Szalai , Herman Helsen , Karin Winkler , Marjolein E. Lof , Wopke van der Werf , Niamh M. McHugh , Barbara M. Smith , David W. Wallis , James E. Cresswell

Abstract Pollination services to crops may be worsening because of declines in farmland pollinators, but the consequences for yields have been uncertain. We therefore investigated pollination limitation in four entomophilous crops (oilseed rape, sunflower, pears and pumpkin) by quantifying the difference in harvestable mass between open-pollinated and saturation-pollinated (hand-pollinated) flowers. We also examined whether pollination limitation in the four crops was associated with the number of flower visits by insects. Across 105 commercial fields in six European countries, the average decrease in harvestable mass due to pollination limitation was 2.8 % (SE = 1.15). Among crops, the highest decreases were in sunflowers (8%) and in one of three oilseed rape production regions (6%). We observed substantial variation among crops in the numbers of insect visits received by flowers, but it did not significantly correspond with the levels of pollination limitation. Our results suggest that yields in these crops were not severely pollination-limited in the regions studied and that other factors besides visitation by pollinators influenced the degree of pollination limitation.

中文翻译:

欧洲一些虫媒作物中度授粉受限

摘要 由于农田授粉媒介的减少,对作物的授粉服务可能会恶化,但对产量的影响尚不确定。因此,我们通过量化开放授粉和饱和授粉(手工授粉)花之间可收获质量的差异,研究了四种虫媒作物(油菜、向日葵、梨和南瓜)的授粉限制。我们还研究了四种作物的授粉限制是否与昆虫探花次数有关。在六个欧洲国家的 105 个商业田地中,由于授粉限制导致的可收获质量平均减少了 2.8% (SE = 1.15)。在作物中,降幅最大的是向日葵 (8%) 和三个油菜产区之一 (6%)。我们观察到,在不同作物间,花朵被昆虫访问的次数存在显着差异,但这与授粉限制的水平没有显着对应。我们的结果表明,这些作物的产量在所研究的地区没有受到严重的授粉限制,除传粉媒介外,其他因素也影响了授粉限制的程度。
更新日期:2020-10-01
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