Effect of soil surface roughness on emergence rate and yield of mechanized direct-seeded rapeseed based on 3D laser scanning  

作　　者：Hui Chen Liping Gao Mengcheng Li Yitao Liao Qingxi Liao 

机构地区：[1]School of Energy and Power Engineering,Xihua University,Chengdu 610039,China [2]College of Engineering,Huazhong Agricultural University,Wuhan 430070,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第3期110-119,共10页国际农业与生物工程学报（英文）

基　　金：This work was financially supported by the China Postdoctoral Science Foundation(Grant No.2020M672371);the National Key Research and Development Program of China(Grant No.2018YFD0200901);the Postdoctoral Science and Technology Activities project of Hubei Province;the Talent Introduction Project of Xihua University(Grant No.Z221029).

摘　　要：The quality of seedbed after sowing such as soil surface roughness is one of the key factors affecting the seedling emergence of rapeseed,which ultimately affected crop yield.However,the effect of soil surface roughness on seedling emergence and yield of rapeseed is still unclear.In this study,field experiments at the experimental site of Jianli and Shayang were carried out.Three treatments were designed:relative slow(M1),medium(M2),and fast(M3)forward speed of the unit.Soil surface roughness measured by a 3D laser scanner,seed quantity of the seeder,emergence rate and yield of rapeseed were determined to investigate the soil surface roughness effect on emergence rate and yield of rapeseed.The results showed that as the forward speed of the unit increased,the compartment surface became rougher.Compared with the M1 and M2 treatments,soil surface roughness under the M3 treatment increased by 36.5%and 9.8%,respectively.The actual seed quantity of the seeder under different treatments ranged from 3806.56 to 4158.18 g/hm2.The average error rate of the actual and theoretical seed quantity was less than 5%,which met the operational quality requirements for seeding rapeseed crops.As the forward speed of the unit increased,the actual seed quantity of the seeder gradually increased while the emergence rate and yield of rapeseed decreased.The seed quantity under the M3 treatment increased by 6.9%and 4.7%,while the emergence rate of rapeseed decreased by 3.3%and 2.0%,and the yield decreased by 23.2%and 13.1%,compared with the M1 and M2 treatments,respectively.Correlation analysis indicated that emergence rate and yield of rapeseed were negatively influenced by soil surface roughness.Considering rapeseed emergence rate,seed yield,and economic benefits,the M1 treatment was recommended.But considering the factor that the M1 treatment may reduce the unit operation efficiency,and thus resulting in lower cost of production,M2 could be recommended in actual farming.The results of this study laid a theoretical foundation for analyzi

关 键 词：mechanized direct-seeder soil surface roughness RAPESEED seed emergence rate YIELD 

分 类 号：S23[农业科学—农业机械化工程]