The effect of increasing production is obvious. The test results showed that under the same conditions of nitrogen and phosphorus fertilizers, Chinese cabbage was increased with potassium fertilizer (50% potassium sulfate) 18 kg/mu, and the increase rate was as high as 33.2%. The average yield per kg of potassium sulfate was 159 kg.
Increase disease resistance. The application of potash fertilizer can significantly increase the disease resistance of Chinese cabbage and reduce the incidence of disease. According to statistics, the incidence of disease caused by cabbage fertilizer application was only 1.9%, the incidence rate in the control area was 11.4%, and the incidence rate was reduced by 9.5%.
Increase product rates. The potash-causing Chinese cabbage was tightly packed, and there were few virtual leaves. The cabbage in the control area was not tight and the difference was obvious. In the winter storage, 3 tightly packed green leaves are used as the standard commercial vegetables. The rate of Chinese cabbage with potash fertilizer is 88.5%~91.2%, and that of the control area is 80%~83.1%. Potash fertilizer is used to increase the quality of cabbage products. Rate, thus improving economic efficiency.
The basic method of potassium application: Chinese cabbage produces more than 10,000 kilograms, requires 300 to 500 kilograms of refined organic manure, 300 kilograms of dried chicken manure, and 3 manure from manure, and applies compound fertilizer (NPK content is 35 More than %), such as Sacred-rich potassium sulfate compound fertilizer with 30 to 40 kg; the above two kinds of fertilizer can be mixed and applied. Nitrogen fertilizer (46% of urea, 15 kg), phosphate fertilizer (14% of calcium superphosphate, 30 kg), and potassium fertilizer (50% of potassium sulfate, 12 kg) were used as compound fertilizer without compound fertilizer. It is best to concentrate on ditching, ridge up with soil, and sow cabbage seeds on ridges.
Topdressing: Chinese cabbage needs more than 60% of the total amount of fertilizer during the entire growth period. In addition to topdressing nitrogen fertilizer (urea 20~25kg), another 5~7kg of potassium sulfate is recovered during this period. , Application of trenches between ridges and soil watering.
Foliar spraying: 0.2% potassium dihydrogen phosphate can be sprayed from rosette stage to ball stage, spraying once every 7-10 days, spraying 3 times in total, spraying in the morning, evening or cloudy day Shi.