施钙对烟叶拉断强度、拉伸强度的效应  

Effects of Ca on Flue-cured Tobacco Leaf Draw and Tensile Strength

作　　者：杨悦章[1] 胡小曼[1] 李佛琳[1] 李成杰[2] 蔡寒玉[2] 崔宇翔[1] 杨焕文[1] 

机构地区：[1]云南农业大学烟草学院,云南昆明650201 [2]云南省烟草公司丽江市公司,云南丽江674100

出　　处：《云南农业大学学报（自然科学版）》2011年第B12期74-76,83,共4页Journal of Yunnan Agricultural University:Natural Science

基　　金：中国烟草总公司重大专项(110200902034);云南省烟草公司科技项目(09YN022);云南省应用基础研究项目(2008ZC051M);云南省科技厅人才项目(2010CI030)

摘　　要：为了探讨钙对烟叶拉断强度、拉伸强度的效应,在丽江烟区开展了Ca(OH)_2施用量0,150,750,1 500,2000,2 500 kg/hm^2对烟叶拉断强度、拉伸强度效应的试验。结果表明:(1)上部叶中处理6[Ca(OH)_22 500 kg/hm^2]的烟叶拉断强度最大为1.87 N,中部叶中处理6的烟叶拉断强度最大为1.19 N,下部叶中处理5[Ca(0H)_2 2000 kg/hm^2]的烟叶拉断强度最大为1.14 N。(2)上部叶中处理4[Ca(OH)_2 1 500 Kg/hm^2]的最大拉伸率最大为8.64%;中部叶中处理5[Ca(0H)_2 000 kg/hm^2]的最大拉伸率最大为6.07%;下部叶中处理5的最大拉伸率最大为4.78%。(3)拉断强度和拉伸强度均存在上部叶>中部叶>下部叶的关系,说明上部烟叶的弹性和抗破碎性最好,而下部烟叶最易破碎。In order to find out effects of Ca on flue-cured tobacco leaf draw and tensile strength, the usage of Ca（OH）2 0, 150, 750, 1 500, 2000, 2500 kg/hm^2 was set in Lijiang area. The results showed： （1） In upper leaves, the strongest effect of tobacco on draw strength with 1.87 N was application of Ca（OH）2 2500 kg/hm^2 ; In central leaves, the best effect of tobacco draw strength with 1.19 N was application of Ca（OH）2 2500 kg/hm^2 ; In the lower leaves, the best effect of tobacco draw strength with 1.14 N was application of Ca（OH）2 2000 kg/hm^2. （2） In upper leaves, the best effect of tobacco tension strength with the 8. 64% tension rate was application of Ca（OH）2 1500 kg/hm^2 ; In central leaves, the best effect of to- bacco tension strength with the 6. 07% tension rate was application of Ca（OH）2 2000 kg/hm^2 ; In the lower leaves, the best effect of tobacco tension strength with the 4. 78% tension rate was application of Ca（OH）2 4. 78% 2000 kg/hm^2. （3） For tobacco draw and tensile strength, upper leaves 〉 central leaves 〉 lower leaves. The best of elasticity and resistance was upper leaves, the worst was lower leaves.

关 键 词：钙 烤烟 拉断强度 拉伸强度 

分 类 号：S158.3[农业科学—土壤学]