Experimental study on the correlation between hill direct seeding rate and field seedling rate of typical rice varieties in cold areas  

作　　者：Han Tang Yeming Jiang Changsu Xu Wenqi Zhou Qi Wang Yijia Wang 

机构地区：[1]College of Engineering,Northeast Agricultural University,Harbin 150030,China [2]Department of Industrial and Manufacturing Systems Engineering,The University of Hong Kong,Pokfulam Road,Hong Kong,China

出　　处：《International Journal of Agricultural and Biological Engineering》2021年第5期63-71,共9页国际农业与生物工程学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.31901414);the Natural Science Foundation of Heilongjiang Province of China for Excellent Youth Scholars(YQ2021E003);the Youth Talent Support Program of Northeast Agricultural University of China(Grant No.19QC41).

摘　　要：In order to examine the relationship between the seeding rate of a hill-direct-seeding machine and seedling rate in field,six rice varieties typical for cold areas were selected to conduct the indoor germination tests and field seedling experiment using a hill-direct-seeding machine.Indoor germination and field seedling tests were performed to study the correlation among the mechanical precision seeding process,machine seeding rate and field seedling rate.The results showed that the indoor germination rates were higher than 90%.The series of spoons was adaptable to the hill-direct-seeding process.The number of seeds was 28-30,18-20 and 8-10 grains/hill.The field seedling rates were higher than 85%.The rice variety of Suijing-18 achieved the best field seedling rate,and the highest seeding rate was 18-20 grains/hill,while the average field seedling rate was 94.25%.On this basis,the action law of the hill-direct-seeding machine and the main factors influencing the field seedling rate were analyzed.Mechanical vibration resulted in a higher average seeding rate of the middle seed metering device of the hill-direct-seeding machine than that of both ends.The force between the seed spoons and rice seeds mechanically damaged the seed buds,resulting in the actual field seedling rate being lower than the ideal indoor germination rate.The experimental results can provide a reference for the selection of typical direct seeding rice varieties,the improvement of key components of hill-direct-seeding machines,and the promotion of agronomic models.

关 键 词：cold areas RICE machine hill-direct-seeding SEEDING RATE SEEDLING RATE 

分 类 号：S51[农业科学—作物学]