Effect of Fenoxaprop-P-Ethyl on Mechanical Properties of Different Chinese Thorowax Root Stem

Authors Wang Xin; Yang Jing; Guo Pingyi; Yuan Xiangyang; Zhang Jinhua; Wen Yinyuan

Journal Journal of Biomathematics , 2012,1:27

Abstract In order to study different doses of herbicide on the secure effect of bupleurum by using biomechanics properties of stems.This experiment was conducted by using B.scorzonerifohum and Bupleurum chinense as test materials,fenoxaprop-p-ethyl as herbicide.Section two of the base of stem was tested by using non-metallic materials universal testing machine,and the machanical properties such as maximum loads,stress,strain,youngs modulus,tensile strength and shear strength were studied with statistical software.The results showed that stem diameter,maximum loads and tensile strength of Bupleurum chinense is higher than the B.scorzonerifolium,and the maximum loads of Bupleurum chinense is 13%higher than the B.scorzonerifolium.The tensile strength showed a linear correlation of the stem pole diameter(R = 0.9194).The tensile strength and shear strength with bupleurum stem in jointing period are higher than the flowering period. The tensile strength and shear strength have no significant effect after the bupleurum treated by low doses(0-1500ml/hm~2) of the fenoxaprop-P-ethyl,but the tensile strength and shear strength of bupleurum stem are reduced sharply after using the high dose(3000ml/hm~2) of fenoxapropP -ethyl,which can reduce the capability of resistance to lodging,and the quality and yield are decreased correspondingly.The result can provide reference for the safety application of herbicide on the bupleurum field and harvest medicinal materials with mechanization.

Species covered 北柴胡 Bupleurum chinense