ABSTRACT

The common use of peat as a growing medium for plant production is questioned due to the negative effects on the environment and climate. Therefore, it is of great importance to find substitutes for peat with similar positive properties that have made peat one of the most important substrates in the horticultural sector. Production of biogas from organic residues is a valuable process, producing both energy and a residue, anaerobic digestate (AD), with a high content of plant nutrients. In this study, peat was partly substituted with AD of plant material origin up to 80% in a growing substrate for basil (Ocimum basilicum). Germination, yield and plant nutrient content were measured as well as chemical and physical properties of the growing media. The results showed that with 50% substitution of peat the growth in the AD/peat mix gave the same yield as for the fertilised peat on its own. No toxic or deficiency symptoms could be seen in the 50% mix. The important physical properties of the substrate were similar in peat and AD/peat mixes. However, the water-holding capacity was slightly decreased when part of the peat was substituted.

摘要

由于对环境和气候的负面影响，泥炭作为植物生产的生长介质的普遍使用受到质疑。因此，寻找具有相似积极特性的泥炭替代品非常重要，这使得泥炭成为园艺领域最重要的基质之一。从有机残余物中生产沼气是一个有价值的过程，它既可以产生能量，也可以产生具有高含量植物养分的厌氧消化物 (AD)。在这项研究中，在罗勒 ( Ocimum basilicum）。测量发芽、产量和植物养分含量以及生长介质的化学和物理特性。结果表明，使用 50% 的泥炭替代物，AD/泥炭混合物中的生长与单独施肥泥炭的产量相同。在 50% 的混合物中未观察到有毒或缺乏症状。底物的重要物理性质在泥炭和 AD/泥炭混合物中是相似的。然而，当部分泥炭被替换时，持水能力略有下降。