Effects of green intelligent fertilizer on N,P nutrient loss of tobacco field and economic benefit of flue-cured tobacco in Erhai Lake Basin
[Objective]The application of organic fertilizer instead of chemical fertilizer is one of the important means to reduce the loss of nitrogen and phosphorus nutrients in tobacco fields in the Erhai Lake Basin.However,the previous data show that the fertilizer release of organic fertilizer is not consistent with the nutrient demand of tobacco plants,which leads to the problem of high environmental risk and low quality of tobacco leaves.Therefore,it is urgent to develop fertilizers that are consistent with the growth and development of tobacco plants and are not easy to cause nitrogen and phosphorus loss in tobacco fields in the Erhai River Basin and ensure the green production of tobacco leaves.[Method]In this study,the method of in-situ determination was used to explore the differences of nitrogen and phosphorus loss,growth status and economic benefits of flue-cured tobacco under different fertilization treatments,namely farmers'conventional fertilization(RFF),company recommended fertilizer(RF),green intelligent fertilizer(GIF).[Result]The results showed that:1)The application of green intelligent fertilizer reduced the nitrogen and phosphorus nutrient input in tobacco field;2)During the growth period,the plant height and biomass of tobacco plants treated with green intelligent fertilizer(GIF)were higher than those of farmers'conventional fertilization treatment(RFF)and tobacco companies'recommended fertilizer treatment(RF).Compared with RFF treatment,the biomass of tobacco plants treated with GIF increased by 16.33%.3)The yield and output value of cured tobacco leaves under different treatments ranked as follows:GIF>RF>RFF.Compared with that of RFF,the yield of GIF treatment increased by 8.00%,the output value increased by 19.00%,and the proportion of medium and high-grade cigarettes increased by 9.70%.4)The total nitrogen loss of runoff from each treated tobacco field during the growth period ranked as follows:RFF>RF>GIF,and the total phosphorus loss was RFF>GIF>RF.Compared with RFF treatment,the total nitrogen loss and total phosphorus loss of GIF treatment decreased by 38.00%and 20.00%.[Conclusion]The results of this study show that the application of green intelligent fertilizer can not only improve the yield of flue-cured tobacco and increase farmers'income,but also reduce the nitrogen and phosphorus loss of tobacco fields and thus reduce the their emissions in the Erhai Lake Basin,which is of great significance for ensuring the green and high-quality production of flue-cured tobacco and protecting the water quality of the lake basin.It can realize the synergy of agricultural green development and environmental protection,and provide new ideas for the management of tobacco fields in lake basins.
flue-cured tobaccogreen intelligent fertilizernitrogen and phosphorus losseconomic benefits
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