烤烟施用菜籽饼对烟田土壤后期供氮及烟叶品质的影响

 在云南省通海县进行了烤烟施用菜籽饼肥不同用量试验;不同生育期检测烤烟根际土壤NO₃^--N变化和烟株第一平展叶硝酸盐含量,结果显示:施用菜籽饼提高了烟叶品质。田烟效果比地烟明显。田烟施用菜籽饼对氮碱比的协调作用最为明显。地烟施用菜籽饼对烟叶糖碱比有较好的协调作用。施用菜籽饼对烟田土壤后期供氮具有微弱促进作用。但对烟叶硝态氮衰退趋势影响较小。

Impact on Later-stage Nitrogen Supply and Leaf Quality in Tobacco Field after Rapeseeds Cake Applied to Flue-cured Tobacco

The experiment was conducted on different rate of rapeseeds cake applied to flue-cured tobacco in Tonghai Yunnan; monitoring the changes of NO_3~- level and the content of nitrate in the first top expanded leaf of tobacco plant during growing stages. The results showed that the chemistry quality of the leaf improved by applying the rapeseeds cake. This effect is more obvious for tobaccos growig in the paddy field than tobaccos growing in the dry-land field. Harmonization on ratio of nitrogen and nicotine is rather significant by applying rapeseeds cake in tobaccos growing in paddy field, while harmonization on ration of sugar and nicotine is clearly by applying rapeseeds cake in tobaccos growing in dry-land field. It has little promotion effect on later stage nitrogen supply by applying rapeseeds cake in tobacco field, and has little effect on degradation of NO_3~--N as well.