Effects of Different Soil Selenium Concentrations on Pepper Yield and Selenium Content
Using sodium selenite as exogenous selenium fertilizer,different concentrations of selenium fertil-izer were applied in soil to explore the rule of selenium enrichment on pepper yield and plant organs at different growth stages.This study aims to establish a theoretical foundation for the production,development,and utiliza-tion of selenium-rich peppers.The results showed that when the concentration of selenium was above 10mg/kg,the yield of pepper increased by 7.50%～10.8%.At the seedling stage,the selenium content of pepper plants increased first,and then decreased,after that it maintained a stable trend with the increase of soil selenium con-centration.At the flowering and fruit setting stage,the selenium content of pepper plants continued to increase,and the selenium enrichment law of stems and roots was obviously different from that of leaves.At the harvest stage,the selenium content in the leaves was significantly higher than that in other organs of the plant,and the selenium content in each organ followd the order of leaves>roots>fruits>stems.The variation of selenium accumulation in single pepper fruit was consistent with the variation of selenium content in pepper fruit,and reached the highest value at 10mg/kg concentration level.After evaluating the yield,selenium content and fruit selenium accumulation of pepper,it was concluded that the soil selenium concentration of 10mg/kg is the most suitable level for cultivating selenium-rich pepper.
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