种植密度、施钾期及留叶数对烤烟上部叶质量的影响

Effects of Density,Period of Potassium Fertilization and the Number of Remaining Leaves on Quality of the Upper Part of Flue-cured Tobacco

为了寻求影响丽江市永胜县上部烟叶质量的主要栽培制约因素,为干热河谷区域大面积生产提供指导,进行了种植密度、施钾期以及留叶数试验。结果表明:种植密度以1 111株(120 cm×50 cm)、在揭膜培土时水施钾肥75 kg/hm^2、留叶数为20片的条件下,烟株的产量最高为2 351.26 kg/hm^2,产值最高为30 448.82元/hm^2,上等烟比例最高为48.32%,均价最高位12.95元/kg,净光合速率最高为14.72 mmoL/(m^2·s)。

In order to find the effect of quality of the upper part of flue-cured tobacco leaves which limits main cultural measures in Yongsheng of Lijiang, for huge areas in a hot and dry river valley provides cultivation guidance. Processing the experiment that effects of density, period of potassium fertilization and the number of remaining leaves on quality of the upper part of flue-cured tobacco. The results showed that： in the condition of planting density was 1111 （120 cm×50 cm）, K was 75 kg/hm^2 with water solution at the time of removing membrane and covering soil and the number of remaining leaves was 20, the yield, output value, ratio of high grade, average price and net photosynthetic rate were the highest, reach 2351.26 kg/ hm^2, 30448. 82 Yuan/hm^2 , 48. 32% , 12.95 Yuan/kg, 14. 72 retool/ （m^2·s）.