石家庄市郊区谈固乡白伏大队科技户白上海,土法制备 CO_2,用于温室黄瓜育苗获得成功。在温室内,每日按每立方米空间用5毫升浓盐酸滴在70克碎青石上,使每立方米空间含1,700PPmCO_2,达到了苏联和日本每立方米1,000—2,000PPm 的要求补给标准。采用这种办法育出的黄瓜苗颜色青绿,无病,茎杆粗壮,根系发达,叶片厚,生长速度快,3月1日育苗,4月6 Shijiazhuang Suburban Tan Guxiang white volt Brigade technology households in Shanghai, soil preparation CO 2, for greenhouse cucumber seedling success. In the greenhouse, daily drops of 5 ml of concentrated hydrochloric acid per cubic meter of space were placed on 70 grams of vermiculite to provide 1,700 ppm of PMCO 2 per cubic meter of space, meeting the required supply standards of 1,000-2,000 ppm per cubic meter in the Soviet Union and Japan. Cucumber seedlings grown using this method are green, disease-free, stalks stout, developed root system, leaf thick, fast growth, March 1 nursery, April 6