Effects of Biochar Addition on Soil Nutrients,Yield and Quality of Flue-cured Tobacco
In order to explore the impact of biochar on tobacco planting soil and the yield and quality of cured tobacco leaves,the flue-cured tobacco variety 0110-142 and corn stalk biochar were used as test materials to carry out field positioning experiments.Four treatments were set up,with biochar 5 t·hm-2(B1),biochar 15 t·hm-2(B2),biochar 25 t·hm-2(B3)and no application of biochar(CK),which were used to measure soil nutrients,dry matter weight of flue-cured tobacco,chemical composition and economic properties of tobacco leaves,so as to analyze the effects of different amounts of biochar on soil nutrients,growth and quality of flue-cured tobacco,and conduct correlation analysis between soil nutrients and economic traits of flue-cured tobacco.The results showed that the content of soil organic carbon would be increased by increasing the application rate of biochar,and B2 and B3 treatments significantly increased by 22.76%and 30.31%compared with CK;B3 treatment increased the dry matter accumulation in the roots of flue-cured tobacco during the cluster stage,while B2 treatment increased the dry matter accumulation in the leaves of flue-cured tobacco during the budding stage.After the application of biochar,the chlorine content in the upper leaves of B3 treatment and the lower leaves of each treatment significantly increased,the nicotine content in the lower leaves of B2 treatment significantly increased by 35.71%,the sugar and alkali content significantly decreased compared with CK,and the total nitrogen content in the middle and lower leaves significantly increased;B2 and B3 treatments reduced reducing sugar,and the chemical quality of flue-cured tobacco increased.In terms of economic benefits,B2 treatment significantly increased the proportion and output value of medium tobacco in flue-cured tobacco,while B3 treatment significantly increased yield.Combined with the correla-tion analysis,it was found that soil organic matter and available potassium were significantly positively correlated with the superior to-bacco rate and yield of flue-cured tobacco leaves,respectively.To sum up,B2 and B3 treatments were conducive to the accumulation of soil nutrients and dry matter weight of tobacco plants.At the same time,B2 treatment was conducive to improving the quality and economic properties of tobacco leaves and B3 treatment improved the yield.The application of biochar can improve the soil nutrient status of tobacco planting and the quality of tobacco leaves,which has a certain effect on increasing the yield of flue-cured tobacco.
万方数据
维普
