烤烟对不同硼肥力土壤中硼的反应及丰缺值研究

Study on Response to Boron Nutrient of Flue-cured Tobacco and Its Abundance or Deficiency in Different Fertility Soil

采用盆栽试验,研究6种不同硼肥力土壤施用硼肥对烤烟不同部位对硼的吸收积累和养分吸收的影响。结果表明,1在烤烟生长过程中,叶片对硼、氮和钾的积累量上均表现为团棵期〉打顶期;打顶后烟叶叶片对硼、钾含量大小均表现为下部叶〉中部叶〉上部叶〉茎,而氮含量则表现为上部叶〉中部叶〉下部叶〉茎;2土壤有效硼含量在一定值（0.56~0.75 mg/kg）时,烟叶硼、钾、氮含量随土壤硼含量的增加而增加,而高于0.75 mg/kg时,烟叶对硼、钾、氮的积累受到抑制。因此,烤烟生产中土壤有效硼丰缺值在0.56~0.75 mg/kg之间。

Using pot experiment, the effect of flue-cured tobacco absorption of boron accumulation and nutrient absorption were studied with six different boron fertilizer force soil application of boron fertilizer. The results showed that ： 1The content of boron,nitrogen and potassium were displayed rosette stage topping stage in the process of growth; And the content of boron and potassium of the different part of leaves showed that lower leafmiddle leafleafstem after topping; But the content of nitrogen showed that upper leafmiddle leaflower leafstem. 2The content of nitrogen, boron and potassium was increased with the content of available boron increased,while content of the available boron in soil was lower than the critical range（0.56~0.75 mg/kg）,which would inhibit the absorption and utilization of nitrogen in tobacco plant while content of the available boron in soil was higher than 0.75 mg/kg. So the critical value of available boron in the soil between 0.56~0.75 mg/kg.