Changes of yield and quality of cigar tobacco leaves and soil available nutrients content by replacing chemical fertilizer with rapeseed cake fertilizer at equal amount of nitrogen
In order to explore the effects of application of different proportions of organic fertilizer nitrogen on the growth and quality of cigar tobacco leaves,a field experiment was conducted,with cigar tobacco variety CX80 as the material and rapeseed cake fertilizer as the source of organic fertilizer nitrogen,and four treatments were set according to different proportions of organic fertilizer nitrogen and chemical fertilizer nitrogen,including CK(0:10％),T1(10％:90％),T2(20％:80％)and T3(30％:70％).The effects of each treatment on pH and nutrient content of soil,and growth and quality of tobacco leaves were studied.The results showed that,with the increase of the replacement ratio of organic nitrogen,the content of soil available potassium,alkali-hydrolyzed nitrogen and available boron gradually decreased,the available molybdenum continued to increase,and the pH value,organic matter,exchangeable calci-um,exchangeable magnesium and cation exchange capacity increased first and then decreased.Compared with the control,the plant height and leaf number of T2 increased by 12.02％and 3.09％,respectively,and the maximum leaf area of T3 increased by 7.69％.The yield of treatment T2 and T3 was significantly higher than CK,and the average price of tobacco leaves was increased by 7.64％and 7.57％compared with CK.With the increase of the proportion of organic fertilizer nitrogen replacing chemical fertilizer nitrogen,the contents of nicotine,total sugar and total nitrogen in tobacco leaves after air-curing increased first and then decreased,and the ra-tio of sugar to alkali and the ratio of potassium to chloride increased.The sensory taste showed a fluctuating trend,and T3was the high-est,followed by T1 and T2.
rapeseed cake fertilizerequal nitrogen replacementcigar tobaccotobacco planting soilyield and quality of tobacco leaves
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