无土栽培系统(Soilless Culture System,SCS)是一种不用天然土壤作基质的植物生产栽培技术,它可以减少甚至消除传统栽培方式造成的土壤质量恶化和日益严重的环境问题等。作为一种走向可持续发展的集约化生产方法,近年越来越受欢迎。例如,荷兰几乎所有的温室区域都使用SCS,因为它们具有优点,包括节省高达50%的水和肥料、能够营养性或生产性地引导作物生长,以及更高的产量和更好的质量等。目前国内外常用的一些堆肥生长基质的物理和化学特性相对良好,而生长基质的生物稳定性作为植物生长的重要因素尚不清楚。2023年该院Graham Howell教授团队在国际园艺学《Horticulturae》杂志发表了“Using Respirometry to Investigate Biological Stability of Growing Media in Aerobic Conditions”一文,详细介绍了SSI呼吸代谢系统构建的堆肥生物降解动态呼吸仪测量五种无土栽培生长基质(分别为厌氧沼渣纤维AD、树皮BC、椰壳纤维CR、木纤维WF和绿色堆肥GC)在有氧条件下单一材料的微生物活性、水分对测试的影响、添加营养物质对测试的影响、以及不同生长基质混合的交互作用影响等的研究成果。
Piper betle Linn. is a traditional plant associated with the Asian and southeast Asian cultures. Its use is alsorecorded in folk medicines in these regions. Several of its medicinal properties have recently been proven. Phytochemicalanalysis showed the presence ofmainly terpenes and phenols in betel leaves. These constituents vary in the different cultivarsof Piper betle. In this paper we have attempted to profile eight locally available betel cultivars using the recently developedmass spectral ionization technique of direct analysis in real time (DART). Principal component analysis has also been employedto analyze the DART MS data of these betel cultivars. The results show that the cultivars of Piper betle could be differentiatedusing DART MS data.