Design and field evaluation of hill-drop pneumatic central cylinder direct-seeding machine for hybrid rice  

作　　者：Baolong Wang Xiwen Luo Zaiman Wang Le Zheng Minghua Zhang Yizheng Dai He Xing 

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

出　　处：《International Journal of Agricultural and Biological Engineering》2018年第6期33-40,共8页国际农业与生物工程学报（英文）

基　　金：The authors acknowledge the funding from the Introduction of the National Key Research and Development Program of China(2018YFD0100800);the earmarked fund for China Agriculture Research System(CARS-01-41);International Advanced Agricultural Science and Technology Program(948 plan)(Project No.2016-X24);National Postdoctoral Program for Innovative Talents(BX201700083).

摘　　要：To meet the requirement of the precision direct-seeding for hybrid rice,this study aimed to design a hill-drop pneumatic central cylinder direct-seeding machine to sow ten rows at a time.A series of orthogonal experiments were conducted to investigate the performance of the cylinder seeder.The influences of the hole diameters,degree of vacuum,and rotational speed of the cylinder were tested on JPS-12 computer-vision seeding test platform,and the rotational speed of 10-50 r/min,diameter of 135 mm and a negative pressure of 1.0-2.0 kPa were employed.Test results showed that the optimal parameter combination was a vacuum of 2.0 kPa and a hole diameter of 2.0 mm(straight hole),with a rotational speed of 30 r/min.The probability of(2±1)seeds in each hole was 95.3%,while the probability of seed-missing hole was 2.0%.A series of field experiments were then conducted to test the seeder performance according to China National Standard Test Methods,and the field test results showed that for the hill-drop pneumatic central cylinder direct-seeding machine,the probability of(2±1)seeds in each hill was 91.6%,while the probability of seed-missing hill was 2.7%.The yield data showed that the average effective panicle had 231.25 ears,the average seed setting rate was 9.92%,the average 1000-grain weight was 22.45 g,and the average yield was 7107.9 kg/hm^(2) that was 26.14%higher than the average yield of rice(5634.9 kg/hm^(2))of Guangdong Province in 2016.The results showed that the hill-drop pneumatic central cylinder direct-seeding machine for hybrid rice could be applied in practical precision rice seeding.

关 键 词：direct-seeding machine hybrid rice precision rice seeder pneumatic cylinder platform test field test 

分 类 号：F42[经济管理—产业经济]