水肥耦合对烤烟钾吸收的影响

Effects of Water and Fertilizer Coupling on Potassium Uptake in Flue-cured Tobacco

试验研究了水肥耦合对烤烟钾吸收的影响,为推广烤烟水肥一体化技术提供理论依据。试验于田间条件下,试验设常规施肥(雨养)、常规施肥结合补灌(对照)、50%水肥耦合(基肥占50%)和100%水肥耦合4个处理,随机区组设计,3次重复。结果表明:补灌与雨养相比,下部烟叶和中部烟叶钾吸收量分别提高了30.28%和11.25%;50%水肥耦合与补灌相比,茎、中、上部叶和总钾吸收量分别提高了16.06%、20.07%、14.25%和18.45%;100%水肥耦合与补灌相比,茎钾吸收量提高了11.80%。综合分析认为,50%水肥耦合有利于烤烟钾吸收。

The test studied the effect of potassium absorption of flue-cured tobacco by water and fertilizer coupling,and then it want to providing theoretical basis for popularizing integrated technology of water and fertilizer for flue-cured tobacco.The test was carried out under field conditions,at the same times,it was set 4 treatment as conventional fertilization(rain fed),conventional fertilization combined with supplementary irrigation(control),50% water-fertilizer coupling(basal fertilizer accounts for 50%),100% water-fertilizer coupling,plot experimental design and repeat 3 times.The results showed that:comparedsupplementary irrigationwith rainfall,the lower leaves and middle leaves potassiumuptakeincreased by 30.28%,11.25%;50% water-fertilizer coupling compared with supplementary irrigation,stems,middle and upper leaves,total potassiumuptakeincreased by 16.06%,20.07%,14.25%,18.45%;100% coupling of water and fertilizer compared withsupplementary irrigation,the stem potassium uptakeincreased by 11.80%.According to the comprehensive analysis,50% coupling of water and fertilizerwasfavorable for potassium absorption in flue-cured tobacco.