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Experiment and analysis of residue flow/blockage characteristics for no/minimum till seeding

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2018 ASABE Annual International Meeting  1800450.(doi:10.13031/aim.201800450)
Authors:   Hongbo Zhao, Hongnan Hu, Jin He, Hongwen Li, Zhiqi Zheng, Yifu Zhang, Wenzheng Liu
Keywords:   No/minimum till seeding; strip tillage seeder; residue blockage; high-speed camera.

Abstract. In order to resolve the problem of residue-blockage in no/minimum till wheat seeding in maize-straw covered field in double cropping area of North China-Plain, a field experiment was conducted to study the residue flow characteristics with the widely used strip rotary seeder and a controlled seeder. High speed video analysis showed that during no-minimum till seeding process, residue had two major motion forms: translation and rotation, and two blocking forms: twining on one opener or blocked between openers. The strip-tillage seeder could throw the residue up and bury them with soil to reduce residue accumulation thus avoid blockage. Dual factors test of straw length and straw coverage showed that straw length and straw coverage significantly influenced anti-blockage performance, the longer the straw was,

the heavier the straw coverage was, the higher the blockage grade was. In order to archive a satisfied anti-blockage performance that do not impact no-till seeding, the maize straw length of straw should not be longer than 9.1cm. Working parameter test of the strip tillage seeder showed that travel speed and rotate speed significantly influenced blockage index and torque, while the travel speed become faster, the blockage index turned higher, and the torque turned up at fist then turned down at 4km/h, the higher the rotate speed was, the lower the blockage index was and the bigger the torque was, optimal working parameter was choose at 320r/min of rotate speed and 4km/h of travel speed.

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