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Improving uniform scattering device for straw-smashing,back-throwing,no-tillage planter under complete straw mulching condition

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International Journal of Agricultural and Biological Engineering 2018年第6期11卷 49-57页

作者： Fengwei Gu Xuemei Gao Feng Wu Zhichao Hu Youqing Chen Chong Zhang Nanjing Research Institute for Agricultural Mechanization of National Ministry of Agriculture and Rural Affairs Nanjing 210014China

With the objective of obtaining a completely straw-mulched field,when no-tillage mechanical sowing is implemented with straw smashing,delivering,and back-throwing approaches,it may be difficult to scatter the smashed straw uniformly during a succeeding wheat sowing *** is because the previous rice straw is substantial in quantity and has a high humidity and toughness,which may easily result in non-uniform straw mulching and thus sparse and weak seedlings of *** a force-dispersing and uniform-scattering device was *** the number of scattering impellers,impeller angle,and impeller rotation speed as the main factors and the percentage of pass for the scattering width and non-uniformity of the straw mulching as the assessment indices,single-factor experiments and orthogonal regressive tests were performed,and a dual-index(percentage of pass for the scattering width and non-uniformity of the straw mulching)fitted regression equation was *** test results suggested that the main factors(from primary to secondary)that influence the indices were the impeller rotation speed,number of scattering impellers,and impeller *** optimal parameter combination for the uniform scattering device was four rows of impellers with an angle of 15°,rotation speed of 1015 r/min,percentage of pass of 72.65%for the scattering width,and a non-uniformity of 13.8%in the straw *** combination can be used to realize a uniform scattering of the smashed straw along the seedling rows on the after-sowing *** to the field investigation of the wheat growth,the wheat emergence rate was 90.7%.The research results can provide a reference for improving the uniform scattering device for a straw-smashing,back-throwing,no-tillage planter for obtaining a completely straw-mulched field,enhancing the quality of the machinery operation,and ensuring good and strong seedlings after sowing.

关键词： complete straw mulching no-tillage planter uniform scattering of straw

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