Get out of the misunderstanding of applying cucumber base fertilizer in the greenhouse
Recently, when I visited the countryside, I found that some vegetable farmers had some misunderstandings in fertilizing cucumbers in greenhouses, which affected the yield and planting efficiency of cucumbers. The main misunderstandings are summarized as follows.
Misunderstanding 1: Use animal manure that is not completely decomposed. Some vegetable farmers believe that the more smelly the chicken manure, the better the effect. Actually, this is a misunderstanding. The decomposed chicken manure has almost no foul smell. Chicken manure that has not been fully decomposed is applied to the ground and undergoes secondary fermentation in the shed, which can easily produce ammonia damage. After buckling the film, when the ammonia concentration in the air in the greenhouse reaches 5 mg/L, cucumbers can be harmed; when the ammonia concentration reaches 40 mg/L, root rot and seedling burning can occur. In recent years, the phenomenon of burning seedlings caused by insufficient decomposing of raw manure is very common, so vegetable farmers should pay attention to it.
Misunderstanding 2: Reapply base fertilizer and neglect the use of foliar topdressing and trace element fertilizers. Foliar fertilization can better compensate for the lack of trace elements. The trace elements have the irreplaceable role of other elements. Practice has proved that calcium, boron, sulfur, iron, manganese, zinc, molybdenum and other medium and trace elements are very important for improving cucumber yield and quality. For example, when cucumber lacks calcium, the cucumber root system is not developed, the growth point stops growing, the leaf edge rolls up, and the leaf does not stretch; when the cucumber lacks magnesium, the bud growth stops, the leaf surface turns yellow and white, and the leaf edge becomes necrotic and chlorosis; zinc deficiency is tender The leaves grow abnormally, and the buds are clustered. These symptoms cannot be solved by the nitrogen, phosphorus and potassium in the basal fertilizer, and must be effectively alleviated by topdressing foliar fertilizer.
Misunderstanding 3: Choose quick-acting fertilizers and ignore long-acting fertilizers. Some vegetable farmers only pay attention to some quick-acting fertilizers in fertilizer selection, especially some hormone-containing flush fertilization, which contains high nitrogen and more hormones. The leaves are enlarged and the seedlings are prosperous 1 to 2 days after the flush application. However, only growing the seedlings does not produce results. , Backfired.
Misunderstanding 4: Ignore the use of microbial fertilizer. Biological fertilizers improve root nutrition environment through the life activities of microorganisms, such as fixing nitrogen in the air, transforming nutrients to promote plant absorption of nutrients, secreting hormones to stimulate plant root growth, and inhibit harmful microorganisms. Due to the continuous cropping of cucumbers in greenhouses for many years and the single cropping area, soil-borne diseases have been severe in recent years. The use of biological bacterial fertilizers is necessary to improve the soil, prevent soil-borne diseases, and increase cucumber yield. However, the application of biological fertilizer is not widespread at present. Due to the influence of temperature and soil pH, the application effect is different. Vegetable farmers also have some misunderstandings about biological fertilizer.
Misunderstanding 5: Concentrate fertilization and ignore repeated use of fertilizer. Some vegetable farmers save trouble and worry about the lack of yield of cucumbers, so they use too much base fertilizer at a time, which will cause the early loss of nitrogen fertilizer and the fixation of phosphorus and potassium fertilizers by the soil. Therefore, a small amount of fertilization should be adopted many times, so as to keep the fertilizer not wasted in the early stage and the cucumber will not be defertilized in the later stage.
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