苜蓿地土壤—根系复合体力学特性及机械化耕作机理研究

项目名称： 苜蓿地土壤—根系复合体力学特性及机械化耕作机理研究

项目编号： No.51505088

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 高爱民

作者单位： 甘肃农业大学

项目金额： 20万元

中文摘要： 本课题拟针对我国产业化苜蓿生产中，种植期内不易耕作，土壤结构变劣，影响苜蓿产量和品质的问题，选择苜蓿地土壤—根系复合体为研究对象，利用材料力学、土力学、复合材料力学、植物解剖学的有关方法研究苜蓿根系及土壤—根系复合体的力学性能，获取苜蓿根系在外力作用下的变形和破坏规律，分析苜蓿根系组织结构与其力学性能相互关系，研究苜蓿地土壤—根系复合体的抗剪强度、应力—应变关系，意在探明苜蓿根土复合体抵抗耕作部件切削作用机理；利用调查法和计算机建模技术，建立苜蓿地土壤—根系复合体结构模型和力学模型；利用农业机械试验法、有限元分析法，研究不同工况下，不同部件对苜蓿地土壤—根系复合体的切削性能的影响，进行不同耕作部件与苜蓿地土壤—根系复合体相互作用有限元分析，探明基于苜蓿地的机械化耕作机理。以期促进苜蓿地土壤改良机械研发，保证苜蓿高产稳产。

中文关键词： 农业机械；土壤—根系复合体；力学特性；耕作机理；苜蓿

英文摘要： This stduy fouces on the problem of low Alfalfa yield and qualities since soil is not suitable for farming in Alfalfa production. we choose the Alflafa soil-root composite as the research object, we will use the material mechanics, soil mechanics, composite materials mechanics and plant anatomy to study the mechanical properties of soil-root composite Alfalfa roots and the mechanical properties of Alfalfa roots, and to abtain the regularity of deformation and failure under the action of external force about Alfalfa roots. We will analyzing the relationships between alfalfa roots structure and its mechanical properties and to study the shear strength and stress-strain relationship of soil-root composite, We Intend to proven mechanism of soil-root composite resistance to farming parts cutting action；The survey method and computer modeling techniques will be used to establish structure model and mechanical model of Alfalfa soil-root composite;We also intend to use the agricultural mechanical test method and the finite element analysis method to study the influence of different tillage components on cutting performance of soil-root composite under different conditions, the finite element analysis about relationship between different tillage components and alfalfa field soil-root composite will be made，from this we can proven mechanized farming mechanism based on alfalfa field. Through the above research，we want to promote the Alfalfa soil reclamation machinery research and development, Ensure that alfalfa obtain high and stable yield.

英文关键词： Agricultural machinery;Root-soil Composite;Mechanical Properties;Cultivation Mechanism;Alfalfa