A 5-year field experiment was conducted to study the effects of special controlled release fertilizer on tobacco yield,appearance quality,chemical components and nutrient use efficiency.The results showed that,compared with local recommended fertilization,the special controlled release fertilizer increased the tobacco yield by 14.1-51.8 kg/hm2,significantly improved NPK use efficiency by 2.3-6.7,1.9-3.6 and 1-3.1 percentage point,respectively.The application of special controlled release fertilizer obviously improved the appearance quality and increased the rate of supper tobacco by 3.9-5.8 percentage point;decreased total nitrogen and alkaloid contents and increased reducing sugar contents in tobacco leaves;and also increased the potassium content of middle and upper tobacco leaves;raised the output value by 1404.6-8764.0 yuan/hm2.The average output value of five years was increased by 3385 yuan/hm2.In addition,the application of the controlled release fertilizer reduced fertilizer application frequency and improved economic benefits.These illustrated that the special controlled release fertilizer could supply and balance nutrients for tobacco growth need in time and sufficiently.
tobaccospecial controlled release fertilizeragronomic charactersyieldqualitynutrient use efficiency
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NSTL
维普
万方数据
