Current global temperature increases resulting from human activity threaten many ecosystems and societies, and have led to international and national policy commitments that aim to reduce greenhouse gas emissions. Bioenergy crops provide one means of reducing greenhouse gas emissions from energy production and two novel crops that could be used for this purpose are Sida hermaphrodita (L.) Rusby and Silphium perfoliatum L. This research examined the existing scientific literature available on both crops through a systematic review. The data were collated according to the agronomy, uses, and environmental benefits of each crop. Possible challenges were associated with high initial planting costs, low yields in low rainfall areas, and for Sida hermaphrodita, vulnerability to Sclerotinia sclerotiorum. However, under appropriate environmental conditions, both crops were found to provide large yields over sustained periods of time with relatively low levels of management and could be used to produce large energy surpluses, either through direct combustion or biogas production. Other potential uses included fodder, fibre, and pharmaceutical uses. Environmental benefits included the potential for phytoremediation, and improvements to soil health, biodiversity, and pollination. The review also demonstrated that environmental benefits, such as pollination, soil health, and water quality benefits could be obtained from the use of Sida hermaphrodita and Silphium perfoliatum relative to existing bioenergy crops such as maize, whilst at the same time reducing the greenhouse gas emissions associated with energy production. Future research should examine the long-term implications of using Sida hermaphrodita and Silphium perfoliatum as well as improve knowledge on how to integrate them successfully within existing farming systems and supply chains.

中文翻译：

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两种新颖的能源作物：思达雌雄同体（L.）Rusby和Silphium perfoliatum L.-知识状态

人类活动导致的当前全球温度升高威胁到许多生态系统和社会，并导致了旨在减少温室气体排放的国际和国家政策承诺。生物能源作物是减少能源生产中温室气体排放的一种方法，Sida hermaphrodita（L.）Rusby和Silphium perfoliatum L是两种可用于此目的的新型作物。这项研究通过两种途径对两种作物的现有科学文献进行了研究。系统评价。根据每种作物的农艺，用途和环境效益整理数据。可能的挑战与高昂的初期种植成本，低雨量地区的单产以及Sida hermaphrodita有关。，对核盘菌的脆弱性。但是，在适当的环境条件下，发现这两种农作物都能在持续的时间内提供较高的产量，而管理水平却相对较低，可以通过直接燃烧或沼气生产来产生大量的能源过剩。其他潜在用途包括饲料，纤维和药物用途。环境效益包括植物修复的潜力，以及改善土壤健康，生物多样性和授粉的潜力。审查还表明，使用Sida hermaphrodita和Silphium perfoliatum可以获得环境益处，例如授粉，土壤健康和水质益处。相对于现有的生物能源作物（如玉米），同时减少了与能源生产相关的温室气体排放。未来的研究应检查使用Sida hermaphrodita和Perpholiatum和Silphium perfoliatum的长期影响，并增加有关如何将其成功整合到现有农业系统和供应链中的知识。