生物钾肥对烤烟含钾量和经济性状的影响

试验研究了生物钾肥对烤烟含钾量和经济性状的影响.结果表明,与对照相比,施用生物钾肥能够显著提高烤烟中、上部叶,上、中、下茎部和叶脉中的含钾量;增大上、中、下部茎以及叶脉、叶片之间的钾浓度梯度,使烤烟钾素的分布更集中于烟株的地上部,为提高中、上部烟叶的含钾量提供钾源,增加钾素的积累.同时提高产量、单叶重、上等烟比例和均价,显著提高产值.

Effects of biotic potassium application on potassium content and economic characters of flue-cured tobacco

Field experiment was conducted in 2001 at Xiangcheng to test the effects of biotic potassium application on potassium content and economic characters of flue-cured tobacco.The experiment included four treatments,which were given biotic potassium at rates of 15,30,45 kg / hm2 respectively.The results showed that compared with treatment 1,treatments 2,3 and 4 could significantly promote the content of potassium in middle and upper leaves,and in stalk and midrib,increase the gradient of potassium content between midrib and lamina,cause potassium distribute more in stalk,suppling potassium source for middle and upper leaves and increase potassium accumulation.Biotic potassium application could increase yield,weight of middle leaf,the proportion of top class leaf and average price,could increase value per 667m2 significantly.