摘要
针对中国华北平原小麦-玉米一年两熟地区,玉米收获后秸秆覆盖量大,免耕播种冬小麦易产生堵塞等问题,设计了2BMDF-12型小麦免耕播种机,提出了动力驱动粉碎刀轴与双圆盘播种镇压单体联合防堵机构,并进行了田间播种性能试验。试验结果表明,破茬尖角开沟器前的动力驱动粉碎刀轴解决了铲柄堵塞问题,紧随其后的双圆盘播种单体解决了相邻两组播种机构的壅堵问题,通过性良好,播种深度变异系数分别为19.8%、21.3%,提高了播种质量;一次作业可同时完成秸秆粉碎、开沟、施肥、播种、镇压等多道工序,作业费用降低了50%左右;作业时刀轴上甩刀不入土,动土量为20%,土壤扰动小。
A new-concept of no-till wheat planter, named 2BMDF-12 no-till wheat planter, has been developed by China Agricultural University to solve an extremely important problem, of which zero tillage planting of wheat in narrow row spacing （150-200 mm） between rows of very highlevels full length, standing maize stubble in one pass in double cropping area of North China. The combine anti-blocking device that composed power chopping axle and the planting unit of double-disc opener was designed. Field performance test＇s result showed that the machine could accomplish many procedures, such as stubble chopping, furrow opening, seeds and fertilizer placement etc, in one pass, so the charge of operation could be decreased about 50%. The machine worked well for planting wheat into standing maize stubble and maize stubble shattered. The powered chopping axle resolved the anti-blockage problem that ahead of shank, and the double-disc opener unit reduced the blockage between planting units. Meanwhile the variations for seed depth reduced to 19.8% and 21.3% respectively. So this machine can be a good solution to no-till wheat planting in double cropping areas.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2007年第8期57-61,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
"十五"国家科技攻关计划资助项目(项目编号:2004BA524B03)
关键词
小麦免耕播种机
保护性耕作
一年两熟
防堵
No-till wheat drill, Conservation tillage, Double cropping, Anti-blockage
