收获期烟秆的拉拔力及影响因素  

Relationship between harvest tobacco stem pullout force and related factors

作　　者：谭谦[1,2] 孙松林[1,2] 李军政[1,2] 陈魁[1,2] 高翔宇[1,2] 全伟[1,2] 

机构地区：[1]湖南农业大学工学院,湖南长沙410128 [2]湖南省现代农业装备工程技术研究中心,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2013年第3期319-322,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：中国烟草总公司湖南分公司重点项目(11-13Aa05)

摘　　要：测定并分析烟秆拉拔力与拉拔位移、烟秆直径、土壤含水率、土壤紧实度之间的相互关系。结果表明:拉拔烟秆是一个拉拔力上升阶段和拉拔力下降阶段的综合作用过程,当土壤含水率较低(13.2%)、土壤紧实度较大(18.6 kg/cm2)时,烟秆拉拔位移为14 cm,拉拔力最大值为1 654 N;当土壤含水率较高(21.8%)、土壤紧实度较小(11.54 kg/cm2)时,烟秆拉拔位移为16 cm,拉拔力最大值为1 628 N。烟秆直径与起拔力之间呈正相关直线回归关系,相关系数为0.88,烟秆直径为26.1～38.3 mm时,起拔力为551～1 840 N;土壤含水率越大,起拔力越小;土壤紧实度越大,起拔力越大。Mensurated and analyzed the relationship among the tobacco stem pulling force and pull-out displacement, tobacco stem diameter, rate of soil moisture, soil compactness. The results indicated that the pulling force and displacement curves reveal that the tobacco stem pulling is a comprehensive effect pulling force rising stage and the pulling force decreased stage, when the soil moisture content was low（13.2%）, the soil compactness was large（18.6 kg/cm2）, the pull-out displacement was 14 cm, the maximum pullout force was 1 654 N, when the soil moisture content was high（21.8%）, the soil compactness was small（ll.54 kg/cm2）, the pull-out displacement was 16 cm, the maximum pullout force was 1 628 N; the tobacco stem diameter and the pulling force between was positively related to the linear regression relation, correlation coefficient is 0.88, tobacco stem diameter in the range of 26.1-38.3 mm, the pullout force value between 551-1 840 N; the soil moisture was negatively correlated with the pulling force, the soil moisture content was greater, pulling force was small; the soil compactness was positively correlated with the pulling force, the soil compactness was greatei：, the pulling force was greater.

关 键 词：烟秆 拉拔位移 直径 土壤含水率 土壤紧实度 起拔力 

分 类 号：TB12[理学—工程力学]