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目前,我国农、林、牧业航空作业大都采用常规喷撒法,即按设计亩用量一次喷撒作业。采用此法,撒播树种、草种漏播面积较多,有苗面积率低。从一九七九年至一九八二年,十九个省(区)飞播牧草一百五十多万亩,据云南、河北、陕西、山西四个省七个播区调查,漏播面积一般15％,高的达30％。因此,如何减少漏播,增加有种面积,提高喷撒质量,是飞播牧草的一项重要课题。为了探索提高飞播牧草喷撒质量,我们于一九八三年五月至七月,在云南昭通横山和贵州威宁头坡播区,进行了不同喷撒方式试验研究。
At present, China’s agriculture, forestry, animal husbandry, aviation operations are mostly used conventional spraying method, that is, according to the design of the amount of mu spraying operation. Using this method, sowing trees, grass breach sowing more area, the rate of seedlings area is low. From 1979 to 1982, more than 1.5 million hectares of pasture were planted in 19 provinces (districts). According to the survey of seven sown areas in four provinces of Yunnan, Hebei, Shaanxi and Shanxi, the sown area Generally 15%, up to 30%. Therefore, how to reduce leakage, increase the kind of area, improve the quality of spray, is an important issue of airborne forage. In order to explore ways to improve the quality of aerial sprayed pasture, we conducted different spray test studies in May-July 1983 in Yokota, Zhaotong, Yunnan Province and Weining Taupo, Guizhou.