ABSTRACT

Previous research into the effects of ultrafine bubbles (UFB) on plant growth have been contradictory. To facilitate the resolution of these contradictions, the aim of the present study was to clarify the interspecific differences in growth responses among cereal/leguminous species under different levels of UFB concentrations. Seedlings of six species were grown hydroponically with three different UFB concentrations and two levels of plant nutrition to evaluate biomass and elongation growth. UFB growth promotion under zero-nutrition occurred in all species. Interspecific differences were noted in response to differing UFB concentration levels. Rice and soybean had higher above-ground biomass production at both low and high concentrations. Conversely, other crops exhibited promoted growth at only one of the concentrations. Negative effects occurred in full nutrient conditions except for root elongation. This study demonstrated that growth-promoting effects with UFB depended on the crop species being tested and the concentration of UFB used.

摘要

先前关于超细气泡 (UFB) 对植物生长影响的研究是相互矛盾的。为了促进这些矛盾的解决，本研究的目的是阐明不同UFB浓度水平下谷物/豆类物种之间生长反应的种间差异。用三种不同的UFB浓度和两种植物营养水平对六种植物的幼苗进行水培生长，以评估生物量和伸长生长。零营养条件下UFB生长促进作用在所有物种中均有发生。响应不同的UFB浓度水平，注意到种间差异。水稻和大豆在低浓度和高浓度下都具有较高的地上生物量产量。相反，其他作物仅在其中一种浓度下表现出促进生长。除根伸长外，在全营养条件下发生负面影响。这项研究表明，UFB 的生长促进作用取决于所测试的作物种类和所用 UFB 的浓度。