Design, DEM Simulation, and Field Experiments of a Novel Precision Seeder for Dry Direct-Seeded Rice with Film Mulching

被引:16
作者
Li, Hui [1 ,2 ]
Zeng, Shan [1 ]
Luo, Xiwen [1 ,2 ]
Fang, Longyu [2 ]
Liang, Zhanhao [1 ]
Yang, Wenwu [1 ]
机构
[1] South China Agr Univ, Key Lab Key Technol Agr Machine & Equipment, Minist Educ, Guangzhou 510642, Peoples R China
[2] Jilin Univ, Coll Biol & Agr Engn, Changchun 130022, Peoples R China
来源
AGRICULTURE-BASEL | 2021年 / 11卷 / 05期
关键词
film mulching; mini shovel; telescopic pipe; discrete element modelling; hill-drop sowing; CROP ESTABLISHMENT PRACTICES; WATER-USE EFFICIENCY; YIELD;
D O I
10.3390/agriculture11050378
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Existing devices for dry direct-seeded rice with film mulching in northern China have limitations such as imprecise sowing, unadjustable sowing depth, and seeding device blocking. In this regard, this study proposes a combined seeding method of 'mini shovel + telescopic pipe' for dry direct-seeded rice with film mulching. A precision seeder for dry direct-seeded rice with film mulching was developed through theoretical calculations, discrete element modelling (DEM) simulations, and field experiments. The configuration and diameter of the rollers were obtained. Twelve telescopic pipes were evenly distributed on the circumference of the roller, with a contact ratio exceeding one. This ratio reduced the slip rate of the roller effectively. Subsequently, DEM was used to develop a 3(3) central composite design. The response surface was established with the sowing depth as the response value. According to agronomic requirements, the sowing depth was set to 20 mm. The optimal combination of working parameters was obtained by optimizing the regression equation. The field experiments showed that the performance of the precision seeder for dry direct-seeded rice with film mulching satisfied the requirements of agricultural production, working stably and reliably. The developed device represents a useful solution for dry direct-seeded rice with film mulching.
引用
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页数:15
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