Sait Juanes-Márquez, J. A. Encina-Domínguez, Martin Torres-Mora, Miguel A. Mellado-Bosque, Perpetuo Álvarez-Vázquez, E. Lara-Reimers
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引用次数: 0
摘要
本研究旨在评估各种消除策略对墨西哥东北部以 Amelichloa clandestina 为主的草地物种丰富性和多样性的影响。该物种在农业区被遗弃后开始生长。在面积分别为 40 公顷和 60 公顷的两片草地上,对四种处理方法进行了评估:割草、施用除草剂、焚烧和对照。每种处理在 100 平方米的地块上重复六次。为了评估每个地块的处理方法,在 2 x 2 米地块象限的每个角落测量了植物物种的植被覆盖度,确定了存在的物种,并登记了它们的高度和空中覆盖度。除草剂处理导致 A. clandestina 的数量减少最多,因为其主要物种的高度(17.5 厘米)、植被覆盖度(7.4 平方厘米)和密度(6750 株/公顷)都是最低的。此外,它的丰富度和多样性指数也最高,分别为 2.46 nats。因此,施用除草剂是保持这片 A. clandestina 草场物种丰富性和多样性的最佳选择。
Effect of cutting, burning, and herbicide application to Amelichloa clandestina (Hack.) Arriaga & Barkworth grassland on the structure and species diversity of this grassland ecosystem
This study aimed to evaluate various elimination strategies on the richness and diversity of species in a grassland dominated by Amelichloa clandestina in northeast Mexico. This species establishes after the abandonment of agricultural areas. In two grasslands of 40 and 60 ha, four treatments were evaluated: Cutting of the grass cover, application of herbicide, application of burning, and control. Six repetitions per treatment were applied in 100 m2 plots. To evaluate the treatments in each plot, the vegetation cover of plant species was measured, in each corner of the 2 x 2 m plots quadrants, where the species present were identified and their height and aerial cover were registered. The herbicide treatment resulted in the greatest reduction of A. clandestina since it registered the lowest height (17.5 cm), aerial cover (7.4 cm2), and density (6,750 plants ha–1) of the dominant species. Also, it presented the highest richness and the highest diversity index with 2.46 nats. It is considered that the application of herbicide is the best alternative to maintain the richness and diversity of species in this A. clandestina grassland.