种植密度对烤烟生长发育特征的影响

通过改变植烟密度形成不同的烤烟群体结构，分析测定烤烟生长发育、农艺性状、光合作用和产量、产值、化学成分等指标，得出优质适产的栽培密度。试验结果表明，较低的种植密度有利于提高烟株的农艺性状、叶绿素相对含量及光合作用，烟株的个体发育较好，但其产量、产值、烟叶化学协调性则低于种植密度较高的处理。种植密度为18 510株/hm2处理的产值、产量、烟叶化学协调性最好，适宜于兴仁县当前的烤烟生产。

Effect of planting density on growth and development characterstics of tobacco

By changing the planting density of tobacco to form different population structure, growing period, agronomic traits,photosynthesis, yield, output value and chemical composition was determind to obtain optimal planting density. The results showed that, low planting density improved the agronomic traits, chlorophyll content and photosynthesis of tobacco, and the plant individual development was good, but the yield, output value and chemical coordination was lower than the treatments of high planting density. In this study, as the yield and output value was highest, and chemical coordination was also good, the optimal planting density was 18 510 plants/hm2 for current production of flue-cured tobacco in Xingren county.