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化学除草已在国营农场广泛使用,但其灭草效果相差很大.其原因一般除药剂的配合、药剂的选用、机具的准备等因素外,更重要的是机车速度与给定的垧(或亩)喷量不相符的缘故.有的按垅长和药缸的容量来估计喷洒的速度,结果往往一开始作业时,驾驶员因怕药液不够,采用快速喷洒,快到地头时,看药液有余又放慢机车速度,从而造成前段药量少,灭草效果差;后段药量过大,产生药害.也有的单位计算车速搞的很复杂,驾驶员不易掌握,造成驾驶员心
Chemical weeding has been widely used in state-run farms, but the effects of weed control vary widely, except for the combination of medicaments, the choice of medicaments, the preparation of equipment, etc. More importantly, the locomotive speed is proportional to the speed given by 垧 (or Mu) spray volume is not consistent with the reason.According to the length and the cylinder capacity to estimate the spraying speed, the results are often the beginning of operation, the driver because of fear of liquid is not enough, the use of rapid spraying, approaching to see Surplus liquid chemicals and slow down the locomotive, resulting in the previous paragraph less drug, the effect of poor weed control; the latter part of the drug is too large, resulting in injury. Some units calculate the speed of the car is very complex, the driver is not easy to grasp, causing the driver heart