Harmful symptoms Greenhouse salt damage often causes cucumber stems to atrophy, heart leaves to turn green, undeveloped petioles to bend inward, central leaves appear "inlaid with gold edges", and middle and lower leaves show "parachute" shape. At the same time, the ratio of carbon to nitrogen in the plant decreased, which could easily cause downy mildew and cause premature plant failure. Prevention and control measures Irrigation washing salt: In the greenhouse set up drainage ditch, you can rinse the soil with water in a short time, repeated 2 or 3 times, you can wash away the salt. Adding straw fertilizer: Because the nitrogen content of straw is low and carbon content is high, it can absorb the free nitrogen in the soil. The specific method is to cut the straw, sorghum, corn and other straws into 3 to 4 centimeters in length after the cucumbers are pulled. Spread the fields evenly, and sprinkle about 1,000 kilograms per mu. Then plunge deep, fill the water, and close the greenhouse with soil to increase room temperature. One month later, the film was peeled off and dried. In this way, it can play a role in removing salt, fertilizing and sterilizing. Reasonable application of chemical fertilizers: Salt damage is mainly caused by excessive use of chemical fertilizers. Therefore, it is necessary to scientifically apply fertilization according to planned yield, cucumber growth requirements, and soil fertility. In the cultivation and management, a single nitrogen fertilizer should be used as compound fertilizer. Greenhouse cucumber is generally topdressed with N and P compound fertilizers or chase 1~2 times nitrogen fertilizers, 1 times phosphate fertilizers or potash fertilizers. Note that it is advisable to use phosphorus phosphate in the greenhouse to pass calcium phosphate. Our Pp Resin has a very stable physical and chemical properties according to our professional tests. In addition to the great resistance of shocking strength and other mechanics performance, it also has a good processing performance. Our products have a high heat resistance property which allows us to apply the products in a high temperature environment. Also, the resin pellet has a lazy chemical property, it will not have a react with our daily medical medicine easily. And this also gives us a safety guarantee. Pp Resin For Soft Bottle,Pp Copolymer Resin,Polypropylene Resin,Pp Homopolymer Resin For Bottle SUZHOU CRH PHARMACEUTICAL TECHNOLOGY CO.,LTD , https://www.crh-health.com
Due to no loss of greenhouse conditions, most of the fertilizers are absorbed by the crops, and all the unabsorbed nitrogen, potassium, and other fertilizers remain in the soil. Concentration all the year round will make the soil concentration too high, causing the accumulation of salts on the soil surface and the production of cucumbers. Different degrees of harm.