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The existing residual plastic film recovery techniques in Xinjiang's cotton fields primarily focus on mechanical properties, neglecting the dragging effect of root stubble on the film during collection. This results in residual film readily becoming entangled in the root stubble. It confirmed the operational parameters of the pick-up teeth by analyzing the recovery of residual film when picking up teeth in conditions containing root stubble. Employing a coupled finite element method (FEM) and smooth particle hydrodynamics (SPH) algorithm, the tines, stubble, and residual film were modeled as FEM meshes, while the soil was represented as SPH particles. This enabled simulation of the shear strain, peak stress, pick-up height, and tensile stress exerted by root stubble on the residual film. The recovery of residual plastic film in the presence of cotton root stubble was simulated and the recovery efficiency was analyzed. Field trial results indicated that when root stubble height ranged from 5 cm to 9 cm, the average recovery rate of residual film reached 91.25%, with a residual film retention rate on root stubble of 4.30%. When root stubble height was 10~12 cm, the average residual film recovery rate across plots was 82.66%, with 12.55% of residual film remaining on the root stubble. Plots with root stubble heights of 5~9 cm exhibited an 8.59 percentage point increase in recovery rates compared with plots with root stubble heights of 10~12 cm, alongside an 8.25 percentage point reduction in residual plastic film on stubble. In trial plots with root stubble heights of 5~9 cm, the residual film retention rate on root stubble was 45.34% lower than in plots with root stubble heights of 10~12 cm. The research findings can provide theoretical support for the correlation between root stubble and plastic film remnants, as well as for enhancing the recovery rate of plastic film remnants.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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