Correct Application of potassium Nutrition in rapeseed

(agricultural Wealth net) the potassium requirement of Brassica napus is about 4.25 to 6.35 kg per mu to produce 100 kg of rapeseed. More than 100 to 150 kilograms per mu need to be supplemented with potash fertilizer in order to maintain the balance of soil potassium. 5 kg, 10 kg and 15 kg of potassium sulfate were applied per mu. The increase in production ranges from 11.7% to 51.9%. Compared with those without potassium application, the yield increased by 23.1% and 30.9%, while the effect of potassium fertilizer was not obvious when the content of soil available potassium was higher than 100 mg per kilogram.