Optimal Concentrations of Silicon Enhance the Growth of Soybean (Glycine Max L.) Cultivars by Improving Nodulation, Root System Architecture, and Soil Biological Properties
Source abstract
Abstract
Abstract Today, the beneficial role of silicon (Si) in increasing the growth and yield of monocotyledons has been proven. But the effect of this useful element on dicotyledonous plants such as legumes has been less studied. In addition, the effect of Si on the development of roots and on nodulation in soybeans is still an unexplored research area. In this study, the effect of different levels of Si (0, 100, 200, 400, 600 and 800 mg Si kg-1 soil) from potassium silicate source on some soil biological properties, root morphological characteristics and nutritional responses of four soybean cultivars (cv., Katool, Sari, Saland and Saman with specific growth groups and identity cards) was studied under greenhouse conditions. The results showed that Si application in all cultivars caused a significant increase in shoot dry weight, root length and increased Si and nitrogen uptake in soybean shoots. Also, the application of Si increased nodulation in four soybean cultivars compared to the control treatment. The observed different responses to Si addition were cultivar-specific, probably related with the various Si efficiency strategies developed by these four soybean cultivars. The responses of soybeans to the application of Si levels were finally positive up to the level of 600 mg Si kg-1 and at higher levels there were no any increase (or an inhibitory effect) in nutritional responses and other growth characteristics compared to control. Silicon also caused a significant increase in total bacterial population, silicate-solubilizing bacteria population, microbial biomass, and microbial respiration rate of the soil under cultivation of different soybean cultivars. In this study, the improved growth (shoot dry weight) of soybean cultivars associated with Si treatment was highly correlated with nodulation, root morphological traits, and soil biological properties. In general, our findings suggest that optimal concentrations of Si can be a promising way to improve the production of soybean cultivars.
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Research context
OpenAlex topics: Silicon Effects in Agriculture · Aluminum toxicity and tolerance in plants and animals · Geochemistry and Elemental Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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