不同留杈部位对高海拔地区烤烟早花处理的影响

Effects of Different Branch-remaining Positions on Premature Flowering of Flue-cured Tobacco in High Altitude Areas

对四川泸州市南部高海拔烟区早花程度严重的烟株采取不同留杈方式,研究了其对烤烟性状、抗病性及烟叶质量等的影响,结果表明:正常打顶处往下第2、4、6片叶处留杈的烟叶产量分别为1779.0、1803.6、1734.3 kg/hm2,产值分别为23927.55、24474.90、21592.05元/hm2,均高于不留杈对照。以正常打顶往下第4片叶处留杈最有利于提高烟叶产量、改善烟叶外观质量、协调烟叶化学成分,抗病能力也随着留杈部位的降低而增强。

Tests were conducted in the southern high altitude areas of Luzhou city in Sichuan province to study the effects of different branch-remaining positions on the characters,disease resistance and economic quality of flue-cured tobacco which had the symptom of serious premature flowering.The results indicated that the yield of tobacco whose branch on the second,fourth or sixth leaf-position below the normal topping position was remained was 1779.0,1803.6,or 1734.3 kg/hm2 respectively,and the production value was 23927.55,24474.90,or 21592.05 yuan per hectare respectively,all of them were higher than those of CK（not remaining the branch）.Remaining the branch on the fourth leaf-position below the normal topping position was most helpful to the increase of tobacco yield,improvement of appearance quality,and harmonization of the inner chemical constituents of tobacco leave.The disease resistance strengthened with the decline of branch-remaining position.