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A novel fast-vegetative propagation technique of the pioneer shrub Baccharis linearis on mine tailings by adding compost
International Journal of Phytoremediation ( IF 3.7 ) Pub Date : 2021-02-17 , DOI: 10.1080/15226514.2021.1882383
Rosanna Ginocchio 1, 2 , Luz María de la Fuente 2 , Fabiola Orrego 2 , María José Díaz 1, 2 , Javiera Báez 1, 2 , Juan Francisco Ovalle 2, 3
Affiliation  

Abstract

Interest in Baccharis linearis has increased as an alternative for assisted phytostabilization due to its spontaneous colonization of tailings dumps. The search for a novel fast-vegetative propagation technique to accelerate its coverage on mine tailings is a promising research area for sustainable mine closure plans. In this study, we determined the optimal proportion of compost and tailings as growing media to promote fast B. linearis propagation through a compound layering technique. The assessed growing substrates were: 100% tailings, 70% tailings + 30% compost, and 50% tailings + 50% compost. After 84 days of growth, the change in number and height of layering branches, root and shoot dry mass, percentage of ground coverage, and substrate chemical properties were assessed. The main results showed that compound layering of B. linearis is possible with compost addition. The growth of new roots and layering branches was significantly improved by either 30% or 50% compost addition into tailings, due to chemical improvements of substrate (higher nutrients and pH and decreased copper bioavailability). The study confirms that the compound layering of B. linearis may be an effective and novel technique for speeding the reclamation of post-operative mine tailings, which is improved by the incorporation of compost.



中文翻译:

添加堆肥的先锋灌木Baccharis linearis在尾矿上的快速营养繁殖新技术

摘要

由于Baccharis linearis能自发地定殖尾矿堆,因此人们对它作为辅助植物稳定的替代方法的兴趣增加了。寻找一种新的快速营养繁殖技术以加速其对尾矿的覆盖是可持续矿山关闭计划的一个有前途的研究领域。在这项研究中,我们确定了堆肥和尾矿作为生长介质的最佳比例,以促进快速B. linearis通过复合分层技术传播。评估的生长基质为:100% 尾矿、70% 尾矿 + 30% 堆肥和 50% 尾矿 + 50% 堆肥。生长 84 天后,评估分层枝条的数量和高度、根和芽干质量、地面覆盖百分比和基质化学性质的变化。主要结果表明,添加堆肥可以实现线虫的复合分层。由于底物的化学改良(更高的养分和 pH 值以及降低的铜生物利用度),通过向尾矿中添加 30% 或 50% 的堆肥,新根和分层枝条的生长得到显着改善。该研究证实了B. linearis的复合分层 可能是一种有效且新颖的技术,可加快术后尾矿的复垦,通过掺入堆肥进行改进。

更新日期:2021-02-17
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