Impact of Graphene Addition on the Growth of Bromus inermis and Soil Nutrients
To investigate the effects of graphene addition on the growth of artificial grassland grass and soil nutrients in arid areas of Bromus inermis.Five levels of graphene supplementation(0 mg/L,25 mg/L,50 mg/L,100 mg/L,and 200 mg/L)were applied to potted Bromus inermis plants on June 1,2023.Growth parameters of the grass and soil physicochemical characteristics were evaluated on the 45th,75th,and 100th days post-planting.The findings indicated that:(1)Graphene had a positive impact on the growth of Bromus inermis,with the base diameter,leaf width,and leaf length of Bromus inermis reaching their peak under the C2 treatment,exhibiting increases of 12.32%,39.33%,and 13.10%compared to the C0 treatment(P＜0.05).Additionally,the total biomass fresh weight and dry weight of Bromus inermis was highest under the C2 treatment,showing respective increases of 44.28%and 47.91%compared to the C0 treatment(P＜0.05).(2)The levels of available nitrogen and available phosphorus in the soil reached their peak under the C2 treatment,showing a respective increase of 22.99%and 12.97%compared to the C0 treatment(P＜0.05).Additionally,the available potassium content reached its maximum under the C4 treatment,exhibiting a 24.26%increase compared to the C0 treatment(P＜0.05).(3)Following princi-pal component analysis,19 indicators were reduced to 5 relatively independent indicators,accounting for a cumulative contribution rate of 84.257%.Among these indicators,total biomass dry weight made the larg-est contribution.Subsequently,cluster analysis was used to categorize the concentration of graphene into three groups,with the 50 mg/L treatment yielding the most favorable results.The presence of graphene was found to enhance the growth of Bromus inermis by augmenting soil nutrient levels;however,excessive concentrations of graphene were observed to impede the growth of Bromus inermis.
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