Potassium magnesium sulphate is a new type of multi-element fertilizer produced by Qinghai Zhongxin Guoan Technology Development Co., Ltd., which contains 23% of potassium, 8% of magnesium, and 14% of sulphur. To determine the application effect of this fertilizer on major crops in Hebei Province, Hebei Province The Institute of Agricultural Resources and Environment of the Academy of Agricultural Sciences carried out field comparison tests on greenhouse cucumbers.

The experiment was set up in the greenhouse cucumber production area of ​​Luosheng Village, Gaocheng City, Shijiazhuang City, Hebei Province. The soil type was limedy loam soil, soil nutrient content was 2.06%, total nitrogen was 0.096%, alkaline nitrogen was 89.65mg/kg, and available phosphorus. 43.35 mg/kg, available potassium 102.5 mg/kg, pH 7.8.

The cucumber species tested was Jinchun No. 3. The potassium sulfate and magnesium sulfate fertilizers were supplied by Qinghai Zhongxin Guoan Technology Development Co., Ltd. The nitrogen fertilizers used for the trial were Shijiazhuang Fertilizer Plant for the production of urea, and the phosphate fertilizers for the United States were diammonium, potassium sulfate and potassium chloride for Canadian production.

The experiment was conducted on the basis of iso-nitrogen and phosphorus in combination with different potash fertilizers such as potassium chloride, potassium sulfate and potassium magnesium sulfate. A comparison experiment was conducted with potassium-free treatment as the control. The other three potassium-treated fertilizers were designed for a total amount of potassium, and a total of 4 were designed. deal with.

All the fertilizers in the experiment were applied on March 25, 2005 as a base fertilizer and applied uniformly to the soil and then tilled with cucumbers. Cucumber fruit during the expansion period of acres of topdressing urea 20kg, other cultivator weeding, watering, fighting drugs and other management measures consistent. The fruit was picked on April 20th and picked for the first time on April 26th. At the same time, the growth traits of cucumber were observed and the yield was tracked. The last harvest was performed on July 20. The fruit samples were collected during the cucumber harvest to determine the Vc content.

The test results showed that four different treatments had little effect on cucumber plant height, but from the perspective of functional leaves, the application of potassium chloride, potassium sulfate and potassium magnesium sulfate increased compared with monourea and diammonium alone. The number of functional leaves of cucumber increased by 1 to 3 tablets, of which the combination of potassium sulfate, magnesium, and cucumber had the largest increase, which was 3 tablets. From the stand number, the use of potassium sulfate and potassium magnesium sulfate increased. The number of cucumbers per plant was the number of cucumbers, of which the number of the individuals with potassium magnesium sulfate was the highest, which was 7. The results showed that potassium magnesium sulfate was applied on the basis of nitrogen and phosphorus. The number of functional leaves and the number of melons per plant were the most, and the growth was the best and the yield potential was the greatest.

Compared with single application of nitrogen and phosphate fertilizers, the application of equal amounts of different types of potash fertilizer has increased the appearance, single fruit weight and Vc content of cucumber in varying degrees; from the perspective of different varieties of potassium fertilizer, the appearance of potassium magnesium sulfate cucumber is applied. The traits performed best, and the Vc content increased the most.

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