Design and Experiment of Rebound Dipper Hill-drop Precision Direct Seed-metering Device for Rice

TIAN Liquan, TANG Han, WANG Jinwu, LI Shuwei, ZHOU Wenqi, YAN Dongwei

Abstract

Aiming at the need of precision rice hill-direct-seeding, the precision hill-direct-seeding seed-metering device for rice was designed with the rebound dipper, the work principle of seed-metering device was stated and the movement track of rice seed was analyzed in the process of seeder’s dropping by means of the Matlab software, the evaluation test of the seed-metering device was conducted by using three kinds of rice, which were Longdao 6, Longqingdao 2 and Longqingdao 3, and rotational quadratic orthogonal experiments was carried out to further analyze the effects of qualified rate, reseeding rate and missing rate on seeding performance, including rotation speed of spinning disk and height of hopper. The JPS-12 detecting and experimental set of seed-metering device was selected to test sowing performances. Experimental data was analyzed by Design-Expert software so as to establish the mathematical model between the experimental factors and indexes. The result showed that the best operational parameter combination was that as the rotation speed of spinning disk was 29.34r/min and height of seed hopper was 60mm, the qualified rate and reseeding rate of Longdao 6 were 87.23% and 9.56%, the qualified rate and reseeding rate of Longqingdao 2 were 90.86% and 6.97%, the qualified rate and reseeding rate of the Longqingdao 3 were 89.12% and 7.46%, The sowing performance can meet the requirement of precision rice hill-direct-seeding. The research provided a theoretical reference for the improvement design of precision hill-direct-seeding seed-metering device for rice.

 

Keywords: rice, seed-metering device, rebound dipper, precision hill-direct-seeding, design, experiment

 

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