Seed Treatment with Illite Enhanced Yield and Nutritional Value of Soybean Sprouts

Abstract

Soybean sprouts, a nutritional food product, can contribute to food security because they can be grown within a week and do not require sophisticated technology. The yield and quality of soybean sprouts are influenced by various factors, including seed priming and growing conditions. The objective of this study was to investigate the effects of seed soaking in different concentrations of illite, a clay mineral, on the yield and quality of soybean sprouts. Soybean seeds soaked in five concentrations (0.5%, 1%, 3%, 5%, and 10%, w/v) of illite or tap water for 8 h were named IP-0.5, IP-1, IP3, IP-5, IP-10, and control, respectively. The highest sprout yield was found in IP-3, followed by IP-1, and IP-5, which had 11.1%, 8.8%, and 7.4% increments, respectively, compared to the control. The content of vitamin C, mineral element, isoflavone, total polyphenol, and total flavonoid was higher in many of the illite-treated soybean sprouts than in the control. The overall results indicated that pre-soaking soybean seeds in lower concentrations (0.5−3%, w/v) of illite could be helpful to enhance the yield and nutritional value of soybean sprouts in an easy and inexpensive way.

Effects of Illite-Containing Fertilizer Prototypes on Nutrients Uptake and Antioxidant of Lettuce (Lactuca sativa L.)

“…In particular, in AC-NPS, illite was significantly increased content of total polyphenols (19.5 mg g -1 ), flavonoids (3.8 mg g -1 ), and ABTS scavenging capacity (37.2%). This is the similar pattern to previous observations with tomato and soybean (Lee et al, 2021;Ha et al, 2022). Therefore, antioxidant activity is greatly depended on the level of available nutrients in soil due to the relatively higher nutrient of illite-containing prototypes.…”

“…The prototype-B also showed the similar effect in AK-NRS, which enhanced the level of T-N, Ca and Mg. This is the similar to the result that illite treatment increased mineral content of bean sprouts (Ha et al, 2022). The T-C was significantly higher in the AC-NPS-grown lettuce compared to those in AK-NRS, and it is closely related to N content.…”

Nutrient Inputs for Rehabilitation of Non-responsive Soils in the Guinea and Sudan Savannah Agroecological Zones of Ghana: Impact on Grain Yield and Soil Quality

“…It could be inferred that the supply of Ca, Mg, S, Zn, and B was critical for achieving the maximum P utilization and yield. Calcium may have increased the levels of plant hormones, indoleacetic acid, and gibberellin, which boost soybean growth and yield (Ha et al, 2022). Magnesium is required for a number of biological processes in leaves, including CO 2 fixation in photosynthesis, photophosphorylation, protein and chlorophyll production, phloem loading, and assimilate translocation (Wang et al, 2020).…”

Effect of illite pretreatment on germinated Brown rice with Special Reference to amino acids, antioxidants, texture, and mineral elements

“…However, a simple, innovative method that could be accessed by a layperson to improve the quality of BR is lacking. Therefore, we hypothesized that the application of illite, a clay mineral that contains several different mineral elements, may significantly enhance the growth, germination, and mineral nutrients of BR based on the previous experiment by Ha et al [ 17 ]. There are limited reports on how illite affects plant growth and development or how it improves the germination and nutritional quality of seeds.…”