首页> 外文OA文献 >Relative importance of fertiliser addition to plants and exclusion of predators for aphid growth in the field
【2h】

Relative importance of fertiliser addition to plants and exclusion of predators for aphid growth in the field

机译:在田间向植物中添加肥料和捕食天敌对蚜虫生长的相对重要性

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Herbivore dynamics and community structure are influenced both by plant quality and the actions of natural enemies. A factorial experiment manipulating both higher and lower trophic levels was designed to explore the determinants of colony growth of the aphid Aphis jacobaeae, a specialist herbivore on ragwort Senecio jacobaea. Potential plant quality was manipulated by regular addition of NPK-fertiliser and predator pressure was reduced by interception traps; the experiment was carried out at two sites. The size and persistence of aphid colonies were measured. Fertiliser addition affected plant growth in only one site, but never had a measurable effect on aphid colony growth. In both habitats the action of insect predators dominated, imposing strong and negative effects on aphid colony performance. Ants were left unmanipulated in both sites and their performance on the aphid colonies did not significantly differ between sites or between treatments. Our results suggest that, at least for aphid herbivores on S. jacobaea, the action of generalist insect predators appears to be the dominant factor affecting colony performance and can under certain conditions even improve plant productivity.
机译:草食动物的动力学和群落结构受植物质量和天敌作用的影响。设计了同时处理较高和较低营养水平的析因实验,以研究蚜虫千里光中的一种特殊草食性蚜虫蚜虫的菌落生长决定因素。通过定期添加氮磷钾肥来控制潜在的植物质量,并通过截留阱降低捕食者的压力。实验是在两个地点进行的。测量了蚜虫菌落的大小和持久性。肥料的添加仅在一个部位影响植物的生长,但从未对蚜虫菌落的生长产生可测量的影响。在这两个栖息地中,昆虫天敌的行为均占主导地位,对蚜虫菌落的生长表现出强烈和负面的影响。蚂蚁在两个部位都不受操纵,它们在蚜虫菌落上的表现在部位之间或在处理之间没有显着差异。我们的研究结果表明,至少对于蚜虫的食草昆虫,日本鳄的食肉动物的行为似乎是影响菌落性能的主要因素,在某些条件下甚至可以提高植物的生产力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号