Kim Yangmin X, Kwon Min Cheol, Lee Seulbi, Jung Eun Sung, Lee Choong Hwan, Sung Jwakyung
National Institute of Agricultural Sciences, Rural Development Administration, Wanju, South Korea.
Department of Bioscience and Biotechnology, Konkuk University, Seoul, South Korea.
Front Plant Sci. 2020 Sep 25;11:562399. doi: 10.3389/fpls.2020.562399. eCollection 2020.
Tomato cultivation in the greenhouse or field may experience high surplus salts, including magnesium (Mg), which may result in differences in the growth and metabolite composition of fruits. This study hypothesized that decreasing the supply of nutrients and/or water would enhance tomato fruit quality in soils with excess Mg that are frequently encountered in the field and aimed to find better supply conditions. For tomato plants cultivated in plastic pots using a plastic film house soil, the fertilizer supply varied in either the nitrogen (N) or potassium (K) concentration, which were either 0.1 (lowest) or 0.75 times (lower) than the standard fertilizer concentrations. Water was supplied either at 30 (sufficient) or 80 kPa (limited) of the soil water potential. Lycopene content on a dry-weight basis (mg/kg) was enhanced by the combination of lowest N supply and sufficient water supply. However, this enhancement was not occurred by the combination of the lowest N supply and limited water supply. Sugars and organic acids were decreased by limiting the water supply. Therefore, we carefully suggest that an adjustment of nitrogen with sufficient watering could be one of strategies to enhance fruit quality in excess Mg soils.
温室或田间种植的番茄可能会出现高盐分过剩的情况，包括镁（Mg），这可能导致果实的生长和代谢物组成存在差异。本研究假设，减少养分和/或水分供应会提高田间常见的镁过量土壤中番茄果实的品质，并旨在找到更好的供应条件。对于使用塑料薄膜温室土壤在塑料盆中种植的番茄植株，肥料供应在氮（N）或钾（K）浓度方面有所不同，分别为标准肥料浓度的0.1（最低）或0.75倍（较低）。水分供应分别为土壤水势30（充足）或80 kPa（有限）。以干重计的番茄红素含量（mg/kg）通过最低氮供应和充足水分供应的组合得到提高。然而，最低氮供应和有限水分供应的组合并未出现这种提高。通过限制水分供应，糖和有机酸含量降低。因此，我们谨慎建议，在镁过量的土壤中，调整氮素并充分浇水可能是提高果实品质的策略之一。
