求翻译：首先通过药剂筛选试验，选出对大麻出苗率、保苗率、收获株数提高和原茎、纤维增产及防病虫效果优异的药剂组合两个是什么意思？

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First of all, through pharmaceutical screening test, elected the Miao rate on cannabis, replant trees, harvest rates of increase and the original stems, fiber yields results merit of insects and disease pharmaceutical mix in two

First through the medicament screening experiment, selects to the hemp rate of seedlings emergence, maintains an adequate supply of seedlings rate, the harvest number enhancement and the original stem, the textile fiber production increase and guards against the disease-carrying insect effect outsta

First screening test, elected on the rate of cannabis seedling emergence, keep a full stand of seedlings, harvesting stem and fiber yield increase of number of plant and the original excellent insect and disease control effect of chemical combine two

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