饼肥与化肥配施对烤烟硝酸盐、亚硝酸盐及钾素的影响

通过大田试验,研究了饼肥与化肥配施对烤烟硝酸盐、亚硝酸盐及钾素的影响。结果表明,烟叶硝酸盐、亚硝酸盐和钾素含量因部位而异,且除上部烟叶硝酸盐与钾素和下部烟叶亚硝酸盐与钾素含量分别为负相关外,其他部位烟叶硝酸盐或亚硝酸盐与钾素含量均为正相关。饼肥与化肥各半配施对稳定中部烟叶硝酸盐含量,降低中、下部烟叶亚硝酸盐含量的作用效果较好,75%化肥和25%饼肥配施提高上部烟叶钾素含量的作用较为明显。

Effects of Proportional Application of Cake Fertilizer and Chemical Fertilizer on Leaf Nitrate, Nitrite and Potassium of Flue-cured Tobacco

The effects of proportional application of cake fertilizer and chemical fertilizer on leaf nitrate,nitrite and potassium of flue-cured tobacco were investigated in a field experiment.The results indicated that the nitrate,nitrite and potassium contents were different in different positions of leaves.Except the negative correlations between nitrate content and potassium in upper leaves and between nitrite content and potassium in lower leaves,both nitrate and nitrite contents had positive correlation with potassium content in other positions of leaves.50% cake fertilizer with 50% chemical fertilizer could effectively stablize the nitrate content in middle leaves and decrease the nitrite content in middle and lower leaves.25% cake fertilizer with 75% chemical fertilizer were better than other treatments in increasing the potassium content of upper leaves.