早春时,田间边缘增强了邻近农田杂草种子的捕食

IF 3.5 Q1 AGRONOMY
Sandrine Petit, B. Carbonne, Zoé Etcheverria, Nathalie Colbach, D. Bohan
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引用次数: 1

摘要

颗粒生物的种子耗竭可以调节可耕地农业中的杂草。加强这一监管可以通过采用有利于种子捕食者的农业做法来实现。在这里,我们检验了这样一种假设,即与没有草地边缘的情况相比,沿着草地边缘的草地边缘的存在将增加杂草种子的捕食。2018年5月和6月,在距离田地边缘4、8、16、32米的57个样带上,在15块麦田中暴露了带有早熟禾的捕食卡。卡片要么被关在笼子里(无脊椎动物捕食),要么被所有种子捕食者无笼捕食)。我们发现,在5月份,草地边缘的存在导致了距离田地边缘所有距离的田地内捕食率更高,无脊椎动物对种子捕食的贡献非常大。6月,草地边缘的存在对田间种子捕食没有影响,无脊椎动物和脊椎动物对这一现象的贡献相等。这项初步研究为早春杂草种子捕食中草地边缘增加的假设提供了一些支持。这些栖息地可能是无脊椎动物的出现地,随后在早春,在它们更广泛地分布在田野和/或转向替代猎物之前,草缘附近有大量成虫。这些结果要求对整个种植季节草缘对种子捕食、种子捕食者和替代猎物的影响进行进一步的比较研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Field margins enhance weed seed predation in adjacent fields in early spring
Seed depletion by granivorous organisms can regulate weeds in arable agriculture. Enhancing this regulation can be achieved by adopting farming practices that favour seed predators. Here, we test the hypothesis that the presence of grassy field margins along field edges will increase in-field weed seed predation, in comparison to situations where no grassy field margin is present. Predation cards with Poa annua were exposed in 15 wheat fields in May and June 2018 along 57 transects at distances of 4, 8, 16, 32 meters from the field edge. Cards were either caged (predation by invertebrates) or uncaged predation byall seed predators). We found that in May, the presence of grassy field margins led to higher in-field predation rates at all distances from the field edge, with a very high contribution of invertebrates to seed predation. In June, the presence of grass margin had no impact on in-field seed predation, to which invertebrates and vertebrates contributed equally. This preliminary study provides some support to the hypothesis that grassy field margins augment in-field weed seed predation in early spring. It is plausible that these habitats are emergence sites for invertebrates, with a subsequent high abundance of adults nearby grass margins in early spring, before they disperse more widely across fields and/or switch to alternative prey. These results call for further comparative research on the impact of grass margins on seed predation, seed predators and alternative prey during the whole cropping season.
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来源期刊
Frontiers in Agronomy
Frontiers in Agronomy Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
4.80
自引率
0.00%
发文量
123
审稿时长
13 weeks
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