Design and experimental analysis of rice pneumatic seeder with adjustable seeding rate  

作　　者：He Xing Zaiman Wang Xiwen Luo Ying Zang Siyu He Peng Xu Shuncai Liu 

机构地区：[1]Key Laboratory of Key Technology on Agricultural Machine and Equipment,Ministry of Education,South China Agricultural University,Guangzhou 510642,China [2]College of Engineering,South China Agricultural University,Guangzhou 510642,China [3]Guangdong Provincial Key Laboratory of Agricultural Artificial Intelligence(GDKL-AAI),Guangzhou 510642,China

出　　处：《International Journal of Agricultural and Biological Engineering》2021年第4期113-122,共10页国际农业与生物工程学报（英文）

基　　金：The authors are thankful for funding from the National Natural Science Foundation of China under Grant No.31871529,the earmarked fund for the National key research program of China under Grant No.2017YFD07000700,2017YFD07000704,and China Agriculture Research System under Grant CARS-01-41.The authos also acknowledge the anonymous reviewers for their critical comments and suggestions for improving the manuscript.

摘　　要：To adapt to the diversity of hybrid rice and meet its requirements of precision seeding,a rice pneumatic seeder with adjustable seeding rates was designed in this study.The seeder employed an independent vortex pump to provide the air source for the seed metering device.According to the requirements of air flow in the seed metering device,a sub-pipeline and a general pipeline were designed.The performances of the two types of pipelines were verified by the air pressure uniformity tests.The results showed that the sub-pipeline can distribute the air pressure more evenly than the general pipeline.The coefficient of variation of the sub-pipeline pressure was less than 5%.Wuyou 1179 hybrid rice was selected as the experimental object.The field seeding tests were carried out with different negative pressures and different numbers of groups of sucking holes as experimental factors.The results showed that the average qualified rate of seeding was 93.35%when only 2 groups of sucking holes were working under the seed sucking negative pressure of 2.0 kPa.The average qualified rate of seeding was 87.21%when 3 groups of sucking holes were working under the seed sucking negative pressure of 1.6 kPa.The average qualified rate of seeding was 83.73%when 4 groups of sucking holes were working under the seed sucking negative pressure of 1.6 kPa.The average qualified rate of seeding was 79.86%when 5 groups of sucking holes were working under the seed sucking negative pressure of 1.6 kPa.The main factors affecting the seeding effect were analyzed and the feasibility of a rice pneumatic seeder with adjustable seeding rates was verified by field tests.The research results can provide a basis for its practical production and application.

关 键 词：agricultural machinery adjustable seeding rate SEEDER PNEUMATIC RICE PIPELINE 

分 类 号：S22[农业科学—农业机械化工程]