机械覆膜前的准备工作 (1)地膜覆盖机的安装与调试机具在使用前,首先应在室内进行组装,并粗略地调整、检查一遍,然后再到田间进一步调整试验,直到达到技术要求,作业质量符合标准,方能正式投入作业。 (2)地块的选择和准备土地条件是影响机械覆膜的一个重要因素。如土地条件不好,不仅影响作业质量,还会影响作物的生长和产量。因此,土地条件应达到下列要求:①要秋翻地、秋整地,普施农肥。②地块要稍有垄向坡度,以便自流灌溉和涝时排水。两头高、中间洼的内涝地块,不适合覆膜种植。③低洼地块不适合覆膜。④芦苇多的地块不能覆蟆,因芦苇会刺破地膜,使之失效。⑤地块的土壤要细碎、疏松、无茬子。⑥垄作或畦作地块,垄和畦的宽窄要一致,高度适合。 (3)选用合适的地膜①地膜的质量要符合标准。机械覆膜作业所使用的地膜各项指标,必须达到部颁标准。②膜卷两边必须整齐,如果里出外进,就会与放膜架两端挂卡,无法作业。③膜卷直径不宜过粗,一般不超过 Preparation before mechanical filming (1) Installation and adjustment of plastic film covering machine Before using, the machine should be assembled in the room first, then be roughly adjusted, checked again, and then further adjusted to the field test until it meets the technical requirements, Job quality in line with the standard before formally put into operation. (2) The selection and preparation of plots Land conditions are an important factor affecting the mechanical coating. Poor land conditions, not only affect the quality of operations, but also the crop growth and yield. Therefore, the conditions of the land should meet the following requirements: ① to turn the autumn, autumn and land preparation, general fertilizer. ② plots to a slight ridge slope, in order to runoff irrigation and waterlogging drainage. Two high, mid-depression waterlogging plots, not suitable for film planting. ③ low-lying land is not suitable for coating. ④ reeds and more plots can not get hold, because the reeds will pierce the film, so that failure. ⑤ plots of soil should be fine, loose, no stubble. ⑥ ridge or 畦 for the plot, ridge and ridge width should be consistent, highly suitable. (3) choose the appropriate plastic film ① film quality to meet the standards. Plastic filming operations used by the various indicators of film, must meet the ministerial standards. ② both sides of the film roll must be neat, if the inside out, it will hang with both ends of the film frame card, unable to work. ③ film roll diameter should not be too coarse, generally not more than