Agricultural College, Shihezi University, Shihezi, Xinjiang, 832003, PR China.
Agronomy College, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China.
Plant Physiol Biochem. 2024 Nov;216:109165. doi: 10.1016/j.plaphy.2024.109165. Epub 2024 Sep 27.
Silica nanoparticles (SiNPs) and brassinolide (BR) have been used as nano-fertilizer and growth regulator, respectively to enhance crop tolerance to abiotic stress. However, it is unclear whether a combination of the two (BR + SiNPs) is more beneficial than single application of BR or SiNPs to improve the growth of deficit-irrigated sugar beets. In this study, a two-year (2022-2023) field experiment was conducted to investigate the effects of foliar spraying of water (CK), SiNPs, BR, and BR + SiNPs on the antioxidant defense, photosynthetic capacity, dry matter accumulation, nutrient uptake, and yield of sugar beets under full irrigation (100% of crop evapotranspiration (ETc), W1) and deficit irrigation (60% ETc, W2). The results showed that compared with the application of BR or SiNPs, the application of BR + SiNPs could enhance the antioxidant defense, osmoregulation, and photosynthesis of the full-irrigated and deficit-irrigated sugar beet leaves, and ultimately improved the water status, growth, and yield of sugar beet plants. There was no significant difference in the net revenue (NR) between BR + SiNPs treatment and CK under W1 conditions. However, the NR of the BR + SiNPs treatment increased by 27.0% (p < 0.05) compared with that of CK under W2 conditions, and there was no significant difference in NR between BR + SiNPs and SiNPs treatments. A comprehensive evaluation using entropy weight combined with technique for order preference by similarity to ideal solution method found that under deficit irrigation condition, spraying SiNPs could improve the growth of sugar beet, increase the TY, NR, and water use efficiency, and reduce costs compared with spraying BR + SiNPs. Therefore, foliar spraying of SiNP on deficit-irrigated sugar beets can be used to improve sugar beet growth and reduce the potential economic losses caused by deficit irrigation.
硅纳米颗粒（SiNPs）和油菜素内酯（BR）分别被用作纳米肥料和生长调节剂，以提高作物对非生物胁迫的耐受性。然而，目前尚不清楚将两者（BR+SiNPs）组合使用是否比单独使用 BR 或 SiNPs 更有利于提高亏缺灌溉甜菜的生长。本研究通过两年（2022-2023 年）田间试验，调查了叶面喷施水（CK）、SiNPs、BR 和 BR+SiNPs 对全灌（100%作物蒸发蒸腾量（ETc），W1）和亏缺灌溉（60% ETc，W2）条件下甜菜抗氧化防御、光合能力、干物质积累、养分吸收和产量的影响。结果表明，与单独施用 BR 或 SiNPs 相比，BR+SiNPs 的施用可以增强全灌和亏灌甜菜叶片的抗氧化防御、渗透调节和光合作用，最终改善甜菜植株的水分状况、生长和产量。在 W1 条件下，BR+SiNPs 处理与 CK 之间的净收益（NR）没有显著差异。然而，在 W2 条件下，BR+SiNPs 处理的 NR 比 CK 增加了 27.0%（p<0.05），BR+SiNPs 处理与 SiNPs 处理的 NR 没有显著差异。基于熵权与理想解法相结合的技术对偏好排序法的综合评价发现，在亏缺灌溉条件下，与喷施 BR+SiNPs 相比，喷施 SiNPs 可以改善甜菜的生长，提高 TY、NR 和水分利用效率，降低成本。因此，在亏缺灌溉条件下，叶面喷施 SiNP 可以促进甜菜生长，降低亏缺灌溉造成的潜在经济损失。
