据法国科学家研究,生产1吨油菜籽需要提供亚硫酸盐0.0625吨。照此推算,法国一般油菜籽产量为每公顷2.5～3吨(每亩330～400斤),就需要补给亚硫酸盐0.162～0.188吨(每亩21y～25斤)。他们在2月间每公顷施硫酸钾200公斤(每亩27斤),得到了每公顷增产油菜籽0.6吨(每亩80斤)的效益。在英国,油菜在春季常呈现缺硫症 According to French scientists, producing 1 ton of rapeseed needs to provide 0.0625 tons of sulfites. According to this calculation, the general output of rapeseed in France is 2.5-3 tons per hectare (330-400 jin per acre), which will require the supply of sulfites 0.162-0.188 tons (21 to 25 kg per acre). In February, they applied 200 kilograms of potassium sulfate per hectare (27 kilos per hectare), yielding 0.6 tons of rapeseed per hectare (80 kilos per acre). In the United Kingdom, rape often shows signs of sulfur deficiency in the spring