土壤2025，Vol.57Issue(3)：540-548,9.DOI:10.13758/j.cnki.tr.2025.03.007
滴灌追肥统筹方式对烤烟氮磷钾吸收利用的影响
Effects of Drip Fertigation Modes for Top-dressing on N,P and K Uptake and Utilization of Tobacco
摘要
Abstract
Inorder to explore the suitable integrated method of drip irrigation and top-dressing for tobacco,a field plot experiment was conducted,with the conventional dry fertilization as the control(CK),to study the effects of 2,3,and 4 drip irrigation and top-dressing on the biomass of tobacco,soil mineral nitrogen contents,and the absorption and utilization of nitrogen,phosphorus,and potassium.Results showed that with the increase of drip fertigation times,the biomass of tobacco leaves and the whole plant at maturity stage,as well as the average content of soil mineral nitrogen during the vigorous growth stage and the whole growth stage,increased accordingly.Nitrogen and potassium contents in the leaves,as well as the accumulation and use efficiency of nitrogen,phosphorus,and potassium also increased.There was a significant correlation between nitrogen accumulation in the leaves and the whole plant at maturity stage and the average content of soil mineral nitrogen during the vigorous growth stage(r=0.526-0.816,P<0.01).Compared with CK,there was no significant difference in the utilization rates of nitrogen and potassium fertilizers under 2 and 3 times of drip fertigation.However,use efficiencies of nitrogen and potassium fertilizers were significantly improved by 57.7%and 58.5%(P<0.05)under 4 times of drip fertigation,while the use efficiency of phosphorus fertilizer significantly decreased by 35.7%-50.0%(P<0.05)under drip fertigation,with no significant difference among all fertigation treatments.Compared with 2 and 3 times of drip fertigation,4 times of drip fertigation is more beneficial for maintaining and stabilizing soil mineral nitrogen content during the vigorous growth stage,promoting the growth,development,and nutrient absorption and utilization of tobacco plant,thus is most suitable for tobacco top-dressing in the experimental area.关键词
烤烟/滴灌施肥/氮磷钾/吸收利用Key words
Tobacco/Drip fertigation/N,P and K/Uptake and utilization分类
农业科技引用本文复制引用
马二登,赵正雄,薛如君,高天,刘忠华,封幸兵,徐照丽,李军营,童文杰,邓小鹏..滴灌追肥统筹方式对烤烟氮磷钾吸收利用的影响[J].土壤,2025,57(3):540-548,9.基金项目
云南省技术创新人才项目(202105AD160004)和云南省烟草公司科技计划重大项目(2022530000241033,2024530000241018)资助. （202105AD160004）
