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.
出处
《云南农业大学学报(自然科学版)》
CAS
CSCD
北大核心
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)
关键词
钙
烤烟
拉断强度
拉伸强度
Ca
flue-cured tobacco
draw strength
tensile strength