期刊论文

Soil hole opening methods and parameters optimization of pot seedling transplanting machine for rapeseed

Wu, M.

中文

农业工程学报

1002-6819

2020

36

11

13-21

10.11975/j.issn.1002-6819.2020.11.002

国家油菜产业技术体系(CARS-12) 湖南省自然科学基金项目(2020JJ5254) 湖南农业大学“双一流”建设项目(SYL201802018) 湖南省科技厅重点项目(2019NK2151)。

本校为第一且通讯机构

针对油菜移栽机成穴器对土壤扰动大、孔穴穴壁土壤孔隙度低影响钵苗生长质量的问题,该研究根据油菜钵苗移栽农艺要求,选取成穴器成穴方式(取土式、挤压式)、成穴器下端尺寸、成穴器入土深度为试验因素,利用离散元法对成穴过程进行仿真分析,以穴内截面回土系数和穴壁土壤孔隙度为指标评价各试验因素对孔穴形态及土壤扰动效果的影响。仿真结果表明,取土式成穴是相对较优的成穴方式,所成孔穴的横截面形状为矩形,形成符合农艺要求孔穴的较优参数组合为:成穴器下端尺寸50 mm,入土深度40 mm,所成孔穴上端尺寸的长和宽分别为69和79 mm,有效深度为40 mm,穴壁土壤孔隙率为48.5%,穴内截面回土系数为0.08。...

In order to solve the problem of poor growth quality of pot seedling caused by large soil disturbance and low soil porosity of the hole wall during the hole forming process of soil opener for rapeseed transplanting machine, simulation analysis of the hole forming process of two different types of soil openers was carried out by using the discrete element method software EDEM according to the physical size parameters of rapeseed pot seedlings and the agronomic requirements of transplanting pot seedlings of rapeseed in this paper. The discrete el...