Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning
Straw returning has shown great advantages in residue management and soil protection in crop planting systems. Mechanized retention of straw is the primary straw returning method, which can reduce costs and improve efficiency. It is important to increase the chopping quality in the field of straw re...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/12/2/220 |
| _version_ | 1827657978707181568 |
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| author | Han Lin Jin He Hongwen Li Qingjie Wang Caiyun Lu Wenchao Yang Shenghai Huang Peng Liu Yongbin Chang |
| author_facet | Han Lin Jin He Hongwen Li Qingjie Wang Caiyun Lu Wenchao Yang Shenghai Huang Peng Liu Yongbin Chang |
| author_sort | Han Lin |
| collection | DOAJ |
| description | Straw returning has shown great advantages in residue management and soil protection in crop planting systems. Mechanized retention of straw is the primary straw returning method, which can reduce costs and improve efficiency. It is important to increase the chopping quality in the field of straw returning, because poor chopping quality will provoke a series of problems including seeding blockage. Straw chopping pass rate (CPR) is an important indicator to measure the chopping quality. Therefore, the CPR of straw should be improved during the chopping process. This paper introduced a novel maize straw chopping device. With the ground as the support, the maize straw was chopped rapidly in the vertical direction. The key parameters of the chopping device were determined by establishing mathematical models and kinematics simulation analysis methods via ADAMS. The effects of rotational velocity, installation positions of chopping units, and the tractor forward velocity on the CPR of maize straw and soil bulk density (SBD) were examined through the Box–Behnken design method. The test factors were the rotational velocities of the chopping units (RV, 550 rpm, 650 rpm, 750 rpm), the installation distance of the two chopping units (IDTCU, 480 mm, 600 mm, 720 mm), and the velocity of the tractor (VT, 3 km/h, 4 km/h, 5 km/h). The results showed that the maximum CPR value and better value of SBD were obtained under the RV of 610 rpm, the IDTCU of 526.8 mm, and the VT of 3.96 km/h. Finally, field validation experiments were conducted under the RV of 610 rpm, the IDTCU of 550 mm, and the VT of 4 km/h. The results showed that the CPR of maize straw was 92.0%, which was superior to the requirement as stipulated in the National Standards of China (CPR ≥ 85%). In addition, in 0–50 mm and 50–100 mm soil layers, the bulk density was decreased by 25.42% and 13.24%, respectively. These results become of considerable importance for crop production in China. |
| first_indexed | 2024-03-09T22:53:24Z |
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| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-09T22:53:24Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-9b5ed54a8036499dbe0bff4b88f482ab2023-11-23T18:16:36ZengMDPI AGAgriculture2077-04722022-02-0112222010.3390/agriculture12020220Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw ReturningHan Lin0Jin He1Hongwen Li2Qingjie Wang3Caiyun Lu4Wenchao Yang5Shenghai Huang6Peng Liu7Yongbin Chang8College of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaHebei Nonghaha Agricultural Machinery Co., Ltd., Shijiazhuang 052560, ChinaStraw returning has shown great advantages in residue management and soil protection in crop planting systems. Mechanized retention of straw is the primary straw returning method, which can reduce costs and improve efficiency. It is important to increase the chopping quality in the field of straw returning, because poor chopping quality will provoke a series of problems including seeding blockage. Straw chopping pass rate (CPR) is an important indicator to measure the chopping quality. Therefore, the CPR of straw should be improved during the chopping process. This paper introduced a novel maize straw chopping device. With the ground as the support, the maize straw was chopped rapidly in the vertical direction. The key parameters of the chopping device were determined by establishing mathematical models and kinematics simulation analysis methods via ADAMS. The effects of rotational velocity, installation positions of chopping units, and the tractor forward velocity on the CPR of maize straw and soil bulk density (SBD) were examined through the Box–Behnken design method. The test factors were the rotational velocities of the chopping units (RV, 550 rpm, 650 rpm, 750 rpm), the installation distance of the two chopping units (IDTCU, 480 mm, 600 mm, 720 mm), and the velocity of the tractor (VT, 3 km/h, 4 km/h, 5 km/h). The results showed that the maximum CPR value and better value of SBD were obtained under the RV of 610 rpm, the IDTCU of 526.8 mm, and the VT of 3.96 km/h. Finally, field validation experiments were conducted under the RV of 610 rpm, the IDTCU of 550 mm, and the VT of 4 km/h. The results showed that the CPR of maize straw was 92.0%, which was superior to the requirement as stipulated in the National Standards of China (CPR ≥ 85%). In addition, in 0–50 mm and 50–100 mm soil layers, the bulk density was decreased by 25.42% and 13.24%, respectively. These results become of considerable importance for crop production in China.https://www.mdpi.com/2077-0472/12/2/220maizestraw mulchingstraw returning devicechopping pass ratesoil bulk density |
| spellingShingle | Han Lin Jin He Hongwen Li Qingjie Wang Caiyun Lu Wenchao Yang Shenghai Huang Peng Liu Yongbin Chang Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning Agriculture maize straw mulching straw returning device chopping pass rate soil bulk density |
| title | Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning |
| title_full | Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning |
| title_fullStr | Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning |
| title_full_unstemmed | Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning |
| title_short | Design and Experiment of a Reciprocating Intermittent Chopping Device for Maize Straw Returning |
| title_sort | design and experiment of a reciprocating intermittent chopping device for maize straw returning |
| topic | maize straw mulching straw returning device chopping pass rate soil bulk density |
| url | https://www.mdpi.com/2077-0472/12/2/220 |
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