Influence of plastic film material and thickness on plastic film recovery and cotton growth
In order to optimize the suitable plastic film material and thickness for cotton cultivation,three different materials of polyethylene plastic film,A plastic film(FB2230),B plastic film(90％FK1828+10％resin)and C plastic film(80％DFDA7042+20％FK1828),were selected.Three thicknesses of 10,15 and 20 µm were set,and the commercially available linear low-density polyethylene plastic film(DFDA7042)was used as the control(CK).Plastic film experiments were conducted in cotton fields in the Wusu region of Xinjiang.Electronic tensile testing machine was taken to test the mechanical properties of plastic film at different coverage periods,and the performance of plastic film by combining impurity content,recovery rate,soil temperature and humidity after film covering,and cotton yield were comprehensively evaluated.The results show that:1)In terms of mechanical properties,the A,B,and C films have at least 42.8％,33.1％and 12.9％better longitudinal tensile strength than CK films.Among which,the A film has the best mechanical properties,followed by the B film.Both films have the best mechanical properties at 15 μm,with tensile strength and less deformation,making them suitable for mechanized film production.2)In terms of recycling performance,with the increase of thickness,the impurity content of the plastic film decreases and the recycling rate increases.Both the A and B plastic films have good recovery effect at 15 μm,which are easy to recover and contain less impurities.3)In terms of plastic film materials,A plastic film material FB2230 has excellent strength and anti-aging ability,B plastic film material FK1828 has good initial strength and poor anti-aging ability,but FK1828 has better application prospect as a mixed material.At the same time,FK1828 displays better effect on increasing ground temperature,and can promote cotton yield.In summary,at a thickness of 15 μm,plastic films that the main components of are polyethylene FB2230 and FK1828.have better mechanical properties,higher recovery rate and less impurities.The films can effectively maintain soil temperature during the planting process,increase cotton yield,and are suitable for cotton planting and mechanized recycling.
mulching film materialsmechanical propertiesimpurity contentpickup ratesoil temperature and humidity
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