在直接播种的原生草地上清除表土可改善原生植被,减少杂草竞争

IF 1.9 4区 环境科学与生态学 Q3 ECOLOGY
Paul Gibson-Roy, John Delpratt, Greg Moore
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引用次数: 0

摘要

摘要澳大利亚温带草原是澳大利亚最受威胁的植物群落之一。在农业景观中,草地恢复的主要障碍是有利于外来牧草和其他非本地物种生长的高土壤养分水平、造成激烈地上竞争的高立地杂草生物量以及提供密集萌发苗竞争的丰富杂草种子和芽库。因此,通过恢复将草地还原为耕地必须依靠克服这些挑战,最好是通过减少土壤养分和减轻杂草的影响。这项研究表明,在土壤养分升高和外来植被竞争激烈的地区,通过直接播种去除表层土来恢复多样化的本地草地群落是有效的。相反,研究表明,反复浅耕(12 个月内四次)以刺激杂草萌发,然后每次施用除草剂,至少在短期内(三年)无法实现这一结果。在澳大利亚,草地群落的恢复势在必行,但重要的是,必须采用尽可能有效的恢复方案,以免浪费有限的时间、金钱和资源。有鉴于此,表土处理技术可能会让我们在草地丧失最严重的农业地区离实现这一目标更近一步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Native establishment improved and weed competition reduced by topsoil removal in direct-sown native grasslands

Australian temperate grasslands are among its most threatened plant communities. In agricultural landscapes, major barriers to their recovery are high soil nutrient levels that favour the growth of exotic pasture and other non-native species, high standing weed biomass creating fierce aboveground competition, and rich weed seed and bud banks providing dense emergent seedling competition. Therefore, the return of grasslands to arable landscapes through restoration must rely on overcoming these challenges, ideally by reducing soil nutrients and mitigating the effects of weeds. This study demonstrates the effectiveness of topsoil removal for restoring diverse native grassy communities by direct seeding on sites with a legacy of elevated soil nutrients and competitive exotic vegetation. Conversely, it showed that repeated shallow cultivation (four times over 12 months) to stimulate weed emergence, followed each time by herbicide application, failed to achieve this outcome, at least in the short term (three years). Grassy community restoration is imperative in Australia, but importantly, it must utilise restoration protocols that are as effective as possible so that limited time, money, and resources are not wasted. In this light, the technique of topsoil manipulation may take us one step closer to achieving this goal in agricultural locations, where their loss is most pronounced.

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来源期刊
Ecological Management & Restoration
Ecological Management & Restoration Environmental Science-Management, Monitoring, Policy and Law
CiteScore
4.20
自引率
0.00%
发文量
0
期刊介绍: Ecological Management & Restoration is a peer-reviewed journal with the dual aims of (i) reporting the latest science to assist ecologically appropriate management and restoration actions and (ii) providing a forum for reporting on these actions. Guided by an editorial board made up of researchers and practitioners, EMR seeks features, topical opinion pieces, research reports, short notes and project summaries applicable to Australasian ecosystems to encourage more regionally-appropriate management. Where relevant, contributions should draw on international science and practice and highlight any relevance to the global challenge of integrating biodiversity conservation in a rapidly changing world. Topic areas: Improved management and restoration of plant communities, fauna and habitat; coastal, marine and riparian zones; restoration ethics and philosophy; planning; monitoring and assessment; policy and legislation; landscape pattern and design; integrated ecosystems management; socio-economic issues and solutions; techniques and methodology; threatened species; genetic issues; indigenous land management; weeds and feral animal control; landscape arts and aesthetics; education and communication; community involvement.
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