南平烟区中部烟叶含钼状况及烤烟施钼效应

2007～2009年对福建省南平烟区202个中部烟叶样品钼含量的测定结果表明,南平烟区中部烟叶钼含量平均为0.56mg/kg,以缺或低为主。不同烟区中部烟叶钼含量变异系数较大,全区平均为65.83%,顺昌、政和烟区变异系数较小,但其中部烟叶钼含量均小于1mg/kg。田间试验表明,少量钼酸铵作基肥或在团棵期喷施少量的钼酸铵均能明显提高烟叶产量、质量及烟叶中的钼含量。用7.5kg/hm2钼酸铵作基肥或在团棵期喷施一次0.2%钼酸铵,烟叶可增产2.3%～3.6%,产值增加1068.9～2353.2元/hm2,上等烟比例提高1.0～6.7个百分点,烟叶的品质也得到改善。

Status of Mo Content in Middle Leaves of Flue-cured Tobacco in Nanping Area and Tobacco Responses to Ammonium Molybdate Application

The Mo content in 202 middle tobacco leaf samples from tobacco-planting areas of Nanping city was analyzed during 2007-2009,the results showed that the mean value of Mo content was 0.56 mg/kg for these samples.There was a huge difference in Mo content among the tobacco leaves of different tobacco-planting areas.The results of field tests showed that spraying 0.2% ammonium molybdate at flue-cured tobacco resettling stage or applying 7.5 kg/hm2 ammonium molybdate as base fertilizer could increase the yield of flue-cured tobacco by 2.3%-3.6%,enhance the production value by 1068.9-2353.2 yuan/hm2,raise the proportion of superior tobacco leaves by 1.0-6.7 percent,and also improve the quality of flue-cured tobacco leaves.