论文部分内容阅读
地膜覆盖栽培技术推广应用时间不长,打孔器还处在一个不断改革和发展的阶段。起初,覆盖地膜后播种,有的用剪刀在地膜上绞口,再用小铲挖坑取土。这样膜孔形状不规则,有大有小,边缘不齐。如果播种后压不好土,易被风刮破薄膜,并且坑的深浅不一,周围不平,劳动效率低。后来,一些地方用废手电筒,将后盖打开,在地膜上往下一按,即可打一个圆坑。由于手电筒上下直径相同,很容易将土塞到里面倒不出来。用的时间长了以后,手电筒里塞满了刻下的膜片和夹杂的泥土,用起来就不方便了。后来辽宁、河北等不少地方就生产了下面要介绍的这种打孔器。
Film mulching cultivation technology to promote the application of time is not long, the puncher is still in a stage of continuous reform and development. At first, sow the seeds after covering the mulch. Some sculpt the mulch on the mulch and dig the soil with a spatula. This film hole shape irregular, big and small, the edge is missing. If the pressure after sowing is not good, it is easy to be shattered by the wind, and the shades of the pit are uneven and the work efficiency is low. Later, in some places with waste flashlights, the back cover is opened, the next press on the film, you can play a pit. As the flashlight diameter up and down the same, it is easy to soil plug to pour out inside. After a long time, the flashlight is stuffed with carved diaphragm and mixed soil, which is inconvenient to use. Later, Liaoning, Hebei and many other places to produce the following to introduce this punch.