Efectos alelopáticos de plantas de Cynodon dactylon L. en praderas naturales invadidas

Q3 Environmental Science
D. Bresciano, Nicolás Glison, F. Lezama
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引用次数: 1

Abstract

R������ . Con el objetivo de explorar las causas del éxito invasor de Cynodon dactylon en pastizales intersembrados con leguminosas y fertilizados con fósforo, se evaluó el efecto alelopático de los extractos acuosos de plantas de esta especie invasora —provenientes de un pastizal natural y de un pastizal con intersiembra con leguminosas y fertilización con fósforo— sobre las gramíneas nativas Paspalum notatum y Paspalum dilatatum . Debido a lo observado en pastizales fertilizados, donde la cobertura de C. dactylon aumenta, la de P. notatum decrece y P. dilatatum no es afectado, se esperaba que los aleloquímicos de la invasora provenientes de los pastizales intersembrados y fertilizados afectaran negativamente a P. notatum. Se evaluó el efecto de extractos acuosos de hojas frescas de C. dactylon de un pastizal natural y de un pastizal intersembrado y fertilizado con fósforo sobre la germinación, el crecimiento y el desarrollo de las dos gramíneas intersowing on two fertilized the notatum and P. dilatatum is not the allelochemicals from the intersowing and fertilized have a negative effect on P. notatum . The effect of aqueous extracts of C. dactylon on the germination, growth and development of the two studied. Contrary to our expectations, we detect inhibitory effects of the on germination and adult plants in but an increment of germination of both species irrigated with extracts from intersowing and fertilized grasslands. In contrast, in the responses were The results obtained indicate that aqueous from an allelopathic effect that the invasive success of C. the decrease of P. notatum in fertilized grasslands, although other approaches should be considered for its study.
狗牙根植物在入侵天然草地上的化感作用
是的。为了探索狗牙根在豆类间作和磷肥草地上入侵成功的原因,评估了这种入侵物种的植物水提取物(来自天然草地和豆类间作和磷肥草地)对本地禾本科植物Paspalum notatum和Paspalum explattum的化感作用。由于在施肥草地上观察到的情况,在施肥草地上,C.指纹的覆盖率增加,P.Notatum的覆盖率减少,而P.扩张没有受到影响,预计来自播间和施肥草地的入侵者的化感作用将对P.Notatum产生负面影响。评估了天然草地和磷间作施肥草地的指南针鲜叶水提取物对两种施肥草地和磷间作草地上两种草的发芽、生长和发育的影响。扩张器不是间作和施肥的化感物质,对磷有负面影响。notatum。研究了指南针水提取物对这两种植物发芽、生长和发育的影响。与我们的预期相反,我们检测到La对发芽和成年植物的抑制作用,但用间作和施肥草地的提取物灌溉的两个物种的发芽都有所增加。相反,在答复中,获得的结果表明,水具有化感作用,表明C.入侵的成功。P.在肥沃的草原上减少。不要吃金枪鱼,尽管应考虑其他方法进行研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecologia Austral
Ecologia Austral Environmental Science-Ecology
CiteScore
1.10
自引率
0.00%
发文量
31
审稿时长
47 weeks
期刊介绍: Ecología Austral is the scientific journal published by the Ecological Society of Argentina, that is distributed for free among regular members. It publishes original scientific articles in any branch of the environmental sciences. The articles, in Spanish, English or Portuguese, can be results of original and unpublished scientific research, reviews and updates that summarize the current state of the art on a certain subject, points of view on theory and/or methods in ecology, and teaching aids to be used as supporting reading for students. Manuscripts are peer reviewed by two experts and the revision process is completed within three months after submission and published between two and six month after final acceptance.
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