Effect of Spraying Sodium Selenite at Full Pod Stage on Selenium Content in Soybean Seeds and Yield Per Plant
In order to investigate the effect of spraying sodium selenite on selenium content in soybean seeds and yield per plant,a split plot design was adopted.The main plot was sprayed with different amounts of sodium selenite at the full pod stage,comprising a total of five treatments(CK(clear water):0 g/hm2,C1:30 g/hm2,C2:60 g/hm2,C3:90 g/hm2,C4:120 g/hm2),while the subplot consisted eight soybean varieties.The chan-ges in grain selenium content and yield per plant of eight soybean varieties were analyzed when sprayed with five levels of sodium selenite.The results showed that the soil in the experimental site reached selenium enrichment levels.In the CK treatment,the selenium content in the grains of different soybean varieties did not meet the standard for elenium enrichment soybeans,necessitating additional selenium fertilizer spraying.With the increase of the amount of sodium selenite sprayed,the selenium content in the seeds of eight soybean varieties exhibited an increasing trend.There was a significant or extremely significant positive correlation between the amount of so-dium selenite and the selenium content in soybean seeds.The mean selenium content in the seeds of eight soy-bean varieties increased with the increase of sodium selenite dosage.Compared with CK,C1 to C4 treatment sig-nificantly increased the mean selenium content in the seeds of eight soybean varieties by 571.186%～2 489.831%.The effect of sodium selenite dosage on the selenium content of soybean seeds was greater than that of soybean varieties.The linear regression equation between the amount of sodium selenite sprayed(X)and the mean selenium content(Y)of eight soybean seeds under each amount was Y=0.012X+0.003,r=0.986,reaching a very significant positive correlation.According to this equation,when the selenium content in soybean seeds reached the selenium-rich soybean standard(0.1～1 mg/kg),the range of sodium selenite spraying a-mount was 8.08～83.08 g/hm2.The effect of sodium selenite dosage on the selenium content of soybean seeds was greater than that of soybean varieties.The linear regression equation between the amount of sodium selenite sprayed(X)and the mean selenium content(Y)of eight soybean seeds under each amount was Y=0.012X+0.003,r=0.986,reaching a very significant positive correlation.According to this equation,when the seleni-um content in soybean seeds reached the selenium-rich soybean standard(0.1～1 mg/kg),the range of sodi-um selenite spraying amount was8.08～83.08 g/hm2.Analyzing the regression equation between the amount of sodium selenite sprayed and the selenium content of soybean seeds indicated that'Zheng 9525'had the steepest slope.In C4 treatment,the selenium content of seeds reached a maximum value of 1.997 mg/kg,demonstrating the strongest selenium enrichment ability in seeds.The slope of Qi Huang 34 had the smallest slope,the seleni-um content in grains reached the minimum value of 1.133 mg/kg in C4 treatment,indicating the weakest seleni-um enrichment ability in grains.Under the experimental conditions,spraying sodium selenite did not significanl-ty affect soybean yield per plant.The effect of soybean varieties on yield per plant was greater than that of sodium selenite dosage.
Sodium seleniteSoybeanSelenium contentSelenium rich abilityYield per plant
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NSTL
万方数据
