【摘要】 为了探究干旱胁迫及氮用量对烤烟干物质与氮、磷、钾积累的影响,以烤烟品种吉烟9号为材料,设置5个氮用量处理进行了盆栽试验。结果表明,在农艺性状上,干旱胁迫下处理E(0.60 g/kg)的各项指标都优于其他处理,正常供水条件下处理D(0.45 g/kg)表现最佳,当氮用量增至0.60 g/kg时会抑制烟株的生长;干物质和N、P、K的日积累量都随着施氮量的增加而增加,并且日积累量都呈现慢、快、慢的变化趋势,干旱处理的干物质日积累高峰比正常供水处理提前4 d;K的日积累高峰比N和P提前4 d,说明钾对干旱反映比较敏感。更多还原

【Abstract】 In order to explore the effects of drought stress and nitrogen rate on dry matter and N,P,K accumulation in flue-cured tobacco,with flue-cured tobacco variety Jiyan 9 as materials,5 treatments of different nitrogen rate were set up to do pot experiment.The results showed each index of agronomic traits in treatment E(0.60 g/kg) were better than that in other treatments under drought stress.Under the conditions of normal water supply,the performance in treatment D(0.45 g/kg) was best.And when nitrogen rate was increased up to 0.60 g/kg,the growth of tobacco plants was inhibited.The daily accumulation of dry matter and N,P,K were increased with the increasing of nitrogen application rate and the daily accumulation all showed the change trend of slow-fast-slow.The daily accumulation peak of dry matter under drought stress was advanced 4 days than that in the treatment of normal water supply.The daily accumulation peak of K was advanced 4 days than that of N and P,which indicated that K was more sensitive to drought.更多还原