农业机械学报2026，Vol.57Issue(7)：175-182,8.DOI:10.6041/j.issn.1000-1298.2026.07.016
播量可调式水稻穴播排种器设计与试验
Design and Experiment of Rice Hill-drop Seeding Metering Device with Adjustable Seeding Rate
摘要
Abstract
Aiming to meet the diverse seeding rate requirements of different rice varieties and improve the adaptability of rice seed metering devices to rice seeds of different grain types,based on the seeding agronomy of multiple rice varieties,taking four types of rice seeds with significantly different grain types as test objects,based on their basic physical properties,a seed metering device with adjustable opening of ladle-shaped holes was designed.The device adopted a composite structure of hole-type and fluted roller-type.It drived the transverse displacement of the adjusting wheel of the seed metering wheel through a gear-linked spring mechanism,realizing stepless adjustment of the hole opening(0～14 mm).Based on the three-axis dimensions of rice seeds,the optimized key parameters of the holes were as follows:hole length was 13 mm,width was 6 mm,depth was 4 mm,and a seed quantity adjusting plate(with a height of 58 mm)integrated with a flexible seed cleaning brush and a guiding tooth structure.A three-factor test was conducted on the seed metering device,and the test results showed that as the hole opening increased(from 0 mm to 14 mm),the average seeding rate per hill of indica rice was increased from 1.55～3.30 grains to 15.95～23.09 grains,and that of japonica rice was increased from 1.89～3.98 grains to 16.54～21.69 grains.When the rotation speed of the seed metering wheel was in the range of 40～140 r/min,the coefficient of variation of the seeding rate was decreased from 67.42%to 9.27%as the opening increased.The seed metering device realized stepless adjustment of 3～20 grains with a coefficient of variation of 10%～70%,meeting the precision seeding requirements of different rice varieties.关键词
水稻/排种器/播量可调/穴播Key words
rice/metering device/adjustable seeding rate/hill-drop seeding分类
农业科技引用本文复制引用
张明华,王称称,刘嘉文,臧英,王在满,乔君,秦伟,严伟杰..播量可调式水稻穴播排种器设计与试验[J].农业机械学报,2026,57(7):175-182,8.基金项目
国家重点研发计划项目(2021YFD2000400)、国家自然科学基金项目(32001426)、广东省重点领域研发计划项目(2020B0202010007)和江西省重点研发计划"揭榜挂帅"项目(20223BBF61025) （2021YFD2000400）
