烤烟土壤有效钼临界值的初步研究

Preliminary Study on Critical Level of Available Mo in Flue-cured Tobacco Planting Soil

摘要: 为有效合理施用钼肥,通过盆栽和田间试验研究了钼素营养对烤烟不同性状指标的影响和土壤有效钼的临界值。结果表明,施钼能提高烟叶产量,改善和提高烟叶品质。在盆栽试验条件下,对于烟叶产量性状的土壤有效钼临界值约为0.30 mg/kg,对于烟叶油分性状的土壤有效钼临界值约为0.10 mg/kg。在大田试验条件下,对于烟叶产量性状的土壤有效钼临界值为0.15 mg/kg,对于上等烟和杂色烟性状的土壤有效钼临界值均约为0.20 mg/kg。

Abstract: For applying Mo fertilizer in a reasonable and effective way,the effects of molybdenum nutrient on various trait indexes of flue-cured tobacco and critical value of available Mo in soil were studied by field trial and pot experiment. The results showed that tobacco leaf yield was increased and leaf quality was improved by Mo applying. The pot experiment indicated that the critical values of available Mo in soil were 0.30 and 0.10 mg/kg based on yield traits and oil characters of tobacco leaf, respectively. The field trial demonstrated that the critical value of available Mo in soil was 0.15 mg/kg based on yield traits and about 0.02 mg/kg when the proportions of high grade and variegated leaves were concerned.