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在航播中,播带宽度确定得是否合适,对提高播种质量,降低造林成本关系很大。确定播带宽度必须以播幅的大小及其位移量为依据,而它们又以航高、风速及风向(风向与播带的交角)为转移。1967年我们在开远地医航播时,于Ⅱ、Ⅲ两播区在中航分别播带记载了近地风向、风速及航高。同时,在正摇带及前后各一播带内等距设立接种布10块,控制范围约200米。每次落种后均分别接种布统计落种数,借以了解上述因素对播幅及其位移
In aerial broadcast, whether the width of the sowing tape is properly determined is of great significance for improving the quality of planting and reducing the cost of afforestation. Determine the width of the broadcast must be based on the size of the broadcast and its displacement, and they again in the altitude, wind speed and direction (wind and sow angle) as the transfer. In 1967, when we televised at Kaiyuan, we recorded the near-surface wind direction, wind speed and altitude in the broadcast areas of Ⅱ and Ⅲ in AVIC respectively. At the same time, 10 sets of inoculation cloths were set up at equal intervals in and before and after the live band and the control range was about 200 meters. After each type of seeding were vaccinated cloth seeds statistics, in order to understand the above factors on the sowing and its displacement