泸州地区不同耕作和覆盖方式对烟草产量及品质的影响

在泸州烟区连续3年采取不同耕作方式、种植方式和覆盖方式的定位研究，结果表明，翻耕处理与免耕处理相比能够有效提高烟株株高、茎围、节距、有效叶数，从而提高烟叶产量和产值，同时翻耕还能降低总糖和可溶性糖，提高氮、钾和烟碱含量，改善烟叶品质，特别是在翻耕条件下轮作对增加烟叶产量、产值改善烟叶品质具有显著作用。另外，轮作和秸秆还田能够一定程度增加烟株株高、茎围和节距，改善烟叶品质，提高烟叶的产量和产值。综合而言，以绿肥-烟叶→绿肥/小麦/玉米→绿肥-烟叶轮作处理产量和品质最优，是最适宜的种植模式。 

Effects of different tillage and mulching methods on tobacco yield and quality in Luzhou

A 3-year fixed-site field trial was carried out to study effects of different tillage and mulching methods on tobacco yield and quality in Luzhou. Results showed that tillage treatment could effectively improve plant height, stem diameter, pitch, and effective leaf number of tobacco than no-tillage treatment, thus increased tobacco yield and output value. Content of total sugar and reducing sugar was reduced while content of nitrogen, kalium and nicotinamide was increased, which ameliorated tobacco quality. Crop rotation under tillage treatment had significant effects on tobacco yield, output value and quality. Moreover, crop rotation and straw mulching could improve plant height, stem diameter and pitch, which also improved tobacco yield and output value. Therefore, the most appropriate cultivation pattern for tobacco yield and quality should be the crop rotation in the order of green manure- tobacco, green manure/wheat/corn, and green manure- tobacco.