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通过控释肥养分释放试验和烤烟盆栽试验,研究了控释肥料对植烟土壤供肥特性、烟株伤流液和烤烟根系活力的影响。结果表明:施用控释肥提高了土壤养分含量及其空间有效性;提高了土壤真溶液的钾含量,烟株旺长期土壤真溶液的养分含量最高;大幅度提高了成熟期伤流液中钾的累积量。控释肥能够降低K+与Ca2+、Mg2+拮抗作用,提高钾的有效性;控释肥为烤烟培育了强大的根系,根系活力的动态变化呈双峰曲线,与烟叶的钾含量曲线相吻合。
Through controlled release fertilizer nutrient release experiment and pot experiment of flue-cured tobacco, the effects of controlled release fertilizer on the characteristics of soil fertility of tobacco planting, the injury liquid of tobacco and the root activity of flue-cured tobacco were studied. The results showed that the application of controlled release fertilizer increased the soil nutrient content and its spatial availability, increased the potassium content of the soil true solution, and the highest content of soil nutrients in the long-term tobacco plant was achieved. The K The cumulative amount. Controlled-release fertilizer can reduce the antagonism of K +, Ca2 + and Mg2 +, and increase the availability of potassium. Controlled-release fertilizer fosters a strong root system for flue-cured tobacco and the dynamic changes of root activity show a bimodal curve, which coincides with the curve of potassium content in tobacco leaves.