Optimization and experiment on key structural parameters of no-tillage planter with straw-smashing and strip-mulching  

作　　者：Yinyan Shi Xiaochan Wang Zhichao Hu Fengwei Gu Feng Wu Youqing Chen 

机构地区：[1]College of Engineering,Nanjing Agricultural University,Nanjing 210031,China [2]Nanjing Institute of Agricultural Mechanization,Ministry of Agriculture and Rural Affairs,Nanjing 210014,China

出　　处：《International Journal of Agricultural and Biological Engineering》2021年第3期103-111,共9页国际农业与生物工程学报（英文）

基　　金：The authors acknowledge the financial support provided by the National Natural Science Foundation of China(Grant No.51905281);Jiangsu Agriculture Science and Technology Innovation Fund(Grant No.CX(17)1002)

摘　　要：Accelerate the quality of smashed-straw laying and enhance the effect of seed-bed arranging for no-tillage planter with straw-smashing and strip-mulching in full stubble covered paddy have become imperative in implementing modern conservation tillage.Considering the perfect operating performance(passability and stability)of the developed no-tillageplanter,this study intends to optimize the structure design of smashed-straw diversion device and strip-rotary tillage device.Dynamics equations of smashed straw and kinematics models of rotary blades were established through theoretical analysis,and the principal factors that affecting straw strip-laying quality and seed-bed arranging effect were specified.The influence of out-enlarge angle(η)and slide-push angle(γ)of the diversion device on the coefficient of variation(ζ1)of cover-straw width,and the influence of rotary tillage-blade number(N)and configuration in a singlerotary plane on the broken rate(ζ2)of strip soil were completely analyzed.And then,based on the systematic analysis and integrated scheme,operating performance and field verification tests using the optimized no-tillage planter were thoroughly performed.The results of the performance tests indicated that the out-enlarge angle(η)had a highly significant influence on the coefficient of variation(ζ1),and the slide-push angle(γ)had a significant influence on(ζ1).The rotary tillage-blade number(N)had a highly significant influence on the broken rate(ζ2),and the slide-push angle(γ)had a significant influence on(ζ2).The obtained optimal combination of these key structure parameters through comprehensive analysis wasη=45°,γ=40°,and N=4.Field verification test results indicated that the optimized no-tillage planter achieved mean values of ζ1=10.47%and ζ2=90.95%,which satisfied the relevant operation quality and cultivation agricultural requirement of conservation tillage equipment,and provided technical references for developing the similar no-tillage planter of straw crushing and returning.

关 键 词：no-tillage planter smashed-straw laying strip rotary tillage optimization test 

分 类 号：S15[农业科学—土壤学]