论文部分内容阅读
烤烟是卷烟工业原料。不仅要求一定的产量,更重要的是要求较优的质量.营养条件是影响烤烟产量与质量的重要因素,生产优质烟叶总的要求是氮素适当,磷钾较多。在五、六十年代我省烤烟产量虽高,但品质较好,当时土壤氮素水平较低,磷钾水平较高,氮磷钾比例比较符合优质烟
Flue-cured tobacco is an industrial raw material. Not only requires a certain yield, more importantly, requires better quality.Nutritional conditions are an important factor affecting the yield and quality of flue-cured tobacco, the general requirements for producing high quality tobacco is appropriate nitrogen, phosphorus and potassium more. In the 1950s and 1960s, the output of flue-cured tobacco in our province was high, but the quality was better. At that time, the soil nitrogen level was lower, the phosphorus and potassium levels were higher, and the ratio of nitrogen,