Effects of threshing and storage conditions on post-harvest insect infestation and physical characteristics of maize grain

Geremew, Messenbet; Molla, Aynadis; Gabbiye, Nigus; Harvey, Jaggar; Mahroof, Rizana; Abay, Fetien

doi:10.1016/j.jspr.2023.102131

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…Zhang et al [16] developed a double-row maize harvester matched with walking tractor, but the supporting power of this machine was small, so it can only realize the process of snapping ears, and the operating efficiency needs to be improved. Xu et al [17] developed a single row maize harvester, and studied the technology of maize snapping, transportation and peeling with low dip angel and low loss without branch. However, due to the relatively unreasonable structure, the loss of ear and grain was large.…”

Section: Introductionmentioning

confidence: 99%

Design and experiment analysis of the small maize harvester with attitude adjustment in the hilly and mountainous areas of China

Chen,

Xu,

Wei

et al. 2024

International Journal of Agricultural and Biological Engineering

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To solve the problem of small planting plots and large sloping land for mechanized maize harvesting in China hilly and mountainous areas, a small maize harvester with attitude adjustment was designed to realize maize snapping, peeling, straw crushing and attitude adjusting at on time in this study. The basic structure and working principle of the small maize harvester were described, and the key components were designed as follows. The maize snapping device adopted the combination form of maize snapping plates and straw pulling rollers, and the gap of the straw pulling rollers can be adjusted to adapt to different maize varieties. Two pairs of peeling rollers formed a groove arrangement to improve peeling rate and reduced ear grain loss. The pressure feeding device mainly comprised drive chain and three grade pressure feeding rollers to increase the friction between ears and the peeling rollers, and help ears slide. The attitude adjustment advice was designed according to the high point stationary pursuit leveling method. When the attitude angle of the rack approached 0, the small maize harvester reached the level state. The actual range of attitude adjustment was obtained and the accuracy of static attitude adjustment was verified through attitude adjustment test. The influencing factors of ear loss rate and bract peeling rate were determined by orthogonal test, including the rotational speed of straw pulling rollers, peeling rollers and pressure feeding rollers. The mathematical regression model between the experimental factors and indicators was established by using Design Expert, and through the analysis variance to verify the significance of the evaluation indicators, the best combination of operation parameters was determined that the rotational speed of straw pulling rollers, peeling rollers and pressure feeding rollers were 1440 r/min, 1535 r/min and 406 r/min. Under the optimal combination of the operation parameters, the ear loss rate and bract peeling rate were 1.33% and 93.98%. The design indicators of the small maize harvester can meet the relevant national standards, and can satisfy the need of maize mechanized harvesting in China hilly and mountainous areas.

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Section: Introductionmentioning

confidence: 99%

Design and experiment analysis of the small maize harvester with attitude adjustment in the hilly and mountainous areas of China

Chen,

Xu,

Wei

et al. 2024

International Journal of Agricultural and Biological Engineering

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“…To date, there has been a lot of research on single grain drying and static storage of corn grains (Geremew et al, 2023); however, the research on the wet heat field of corn pile drying remains to be further studied. In addition, the applicability of COMSOL porous media model in maize drying has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Coupling drying of wet and heat field of corn pile based on porous medium model

Liu,

Liu

et al. 2024

J Food Process Engineering

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Corn that are not properly dried can result in a lot of waste. Therefore, in this study, the corn pile was used as porous medium for hot air drying, and the coupling method of multiple physical fields was used to simulate and analyze the corn air‐drying silo with different initial conditions and different sizes. The results show that increasing the temperature of hot air could increase the temperature gradient inside corns and promote the evaporation of water. The higher the wind speed, the better the convective heat transfer effect between corn and air, thus improving the drying efficiency. The smaller the ratio of height to diameter of air‐drying silo, the more corn dried in the direction of hot air flow, resulting in poor drying effect. Increasing the inner diameter of the air‐drying silo will reduce the heat transfer efficiency. The lower the bed of the air‐drying silo, the closer the corns are to the hot air inlet, the faster the heating rate and the better the drying effect. The model has good performance and can be used as a mathematical tool to predict the change of maize wet heat field.Practical applicationsIn order to solve the integral problem of corn drying, the model uses corn grain pile as porous medium for hot air drying. The model investigated the changes of temperature field and humidity field during the drying process of grain pile in corn air‐drying silo. In addition, the characteristics of the model introduced in this study may qualify it for automatic control of corn air‐drying silo and online prediction of drying times to achieve the desired drying effect.

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Effects of threshing and storage conditions on post-harvest insect infestation and physical characteristics of maize grain

Cited by 2 publications

References 37 publications

Design and experiment analysis of the small maize harvester with attitude adjustment in the hilly and mountainous areas of China

Design and experiment analysis of the small maize harvester with attitude adjustment in the hilly and mountainous areas of China

Coupling drying of wet and heat field of corn pile based on porous medium model

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