In recent years, the application of cucumber planting technology in greenhouses has been gradually expanded, which not only can improve the actual economic benefits of farmers, but also play a certain role in promoting the quality of cucumber cultivation. Therefore, in the current greenhouse cultivation process of greenhouse greenhouses, it is necessary to fully grasp the difficulties and key points of planting techniques, and carry out special analysis on the current greenhouse cucumber planting, so as to improve the practical effect of greenhouse cucumber planting in greenhouses. Planting work provides favorable technical support. I. Main points of cucumber planting technology in greenhouse Variety selection The selection of cucumber varieties is very important. It has a basic role in the development of greenhouse cucumber cultivation in greenhouses. There are many varieties of cucumbers that can be selected in actual greenhouse greenhouse cucumber cultivation, such as Jinyan No. 6, Jinyan No. 7, Changchun Sting and so on. 2. Seed treatment Seed treatment is required before cucumber cultivation, and the operation should be divided into three stages. The first is the pretreatment of the seed. In this stage, the seed should be placed in warm water for stirring. The actual water temperature should be controlled at about 60 °C. In terms of mixing time, it can be determined according to the type of seed and the actual conditions of planting, and the time can usually be determined to be 10-15 minutes. When the water temperature drops to about 30 °C, the seeds can be soaked, and the soaking time is controlled at 5 h. This is followed by the cleaning phase of the seed, which is mainly used to clean the seeds. After the seed immersion is completed, an appropriate amount of rinsing liquid is added and sterilized, and then the seed is dried, and after ensuring that it has no residual impurities and moisture, it can be placed in an environment of 30 ° C to germination. Finally, the management phase of seed treatment, which requires repeated flipping of the seeds and ensuring uniform heating of the seeds at room temperature. After the time reaches 24 h, it can be cooled down, and the temperature environment should be kept at about 25 °C until it shows obvious apex or sprouting. 3. Grafting technology In the grafting process, attention should be paid to the selection of grafting materials. Black seed pumpkin should be selected as the grafting rootstock to improve the disease resistance of the seed and effectively overcome the obstacles of continuous cropping. Due to the strong nutrient absorption capacity of black seed squash, the ability of plants to resist pests and diseases can be further improved, and the grafted cucumber plants can be stably grown as expected. The sowing time of the cucumber seeds as the scion should be selected 3 days before the pumpkin rootstock is planted in order to improve the grafting effect. 4. Seedbed preparation The preparation of the seedbed during the cucumber planting process is particularly important. The appropriate location should be selected for planting, and the seedbed should be eutrophicated in order to improve the absorption capacity of the seed. If the soil environment in the actual planting area is not good, the soil should be improved and upgraded in time, and the seedling seedling planning should be done according to the actual planting area of ​​the cucumber. Second, the greenhouse management points of greenhouse greenhouse 1. Temperature management The management of temperature in greenhouse greenhouse cultivation cannot be ignored, and it will have an impact on the whole growth period of cucumber. Different types of cucumbers in different regions have different temperature requirements for different growth periods. During the grafting process, the temperature should be roughly controlled at about 28 °C. Even if the planting environment and type are different, the temperature error should be controlled within 3 °C. For example, in the actual planting process, the greenhouse temperature in the greenhouse is too high, so it is necessary to adjust the indoor temperature in time to ensure the smooth grafting of the cucumber. If the actual temperature is relatively high during grafting, the two-layer membrane should be properly opened. Night temperature management should grasp the temperature change in real time. If the night temperature is lower than 8 °C, it is necessary to take measures to improve the indoor temperature in time to effectively ensure the stable growth of cucumber. 2. Water and fertilizer management After planting, according to the temperature change and growth picking, the water and fertilizer should be properly controlled to ensure a balanced nutrition. In the process of water and fertilizer management, the fertilizer should be combined with the decomposed manure to ensure the water and fertilizer of the cucumber root melon. 3. Pest control Tripping disease The squatting disease usually occurs during the seedling stage of cucumber. When the cucumber in the greenhouse is found to be infected, the Dasheng M-45 can be mixed with carbendazim in the same proportion. For the cucumber that has been infected with the disease Spray. powdery mildew When the cucumber is just infected with powdery mildew, white spots appear on the leaves, and then the spots slowly expand. It can be diluted with 1200 times of water and then sprayed to prevent it. It can be cured after 21~28 days. The above is the key points of greenhouse cultivation and management of greenhouse greenhouses compiled by Huinong. The anti-season greenhouse greenhouse cucumber planting can increase the planting profit for growers.
Chloride is a common inorganic anion in water and wastewater. Chloride ions are found in almost all natural water,and their levels vary widely. In rivers, lakes. In marshes, chloride levels are generally low,but in seawater,salt lakes,and some groundwater levels can be as high as tens of grams per liter. In the human survival activities,chloride has very important physiological functions and industrial uses.Because of this,a considerable amount of chloride ions are contained in domestic sewage and industrial wastewater.
If the content of chloride ion in the book reaches 250mg without litres,the corresponding cation is sodium,will feel salty; High levels of chloride in water can damage metal pipes and buildings and hinder plant growth.
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