Looking at the status quo of greenhouse cucumber production in southern Anhui, there are four misunderstandings in the following areas:
The first is re-treatment light defense. In the prevention and treatment of pests and diseases, some vegetable farmers are greedy for cheap, casually buy some cheap drugs to finish the child, the effect is not guaranteed, once the disease spread and have to beat the fight, the result is that the disease has not yet been completely cured, the leaves are given Focused, the melon tires were also burned, and the output of the hand was running out.
The second is blind fertilization. Some vegetable farmers do not use different formulas according to their appearance and quantity. Instead, they look at what fertilizers they use and what they do with them. Point, there is often no obvious effect after the use of fertilizer, severe cases will also burn roots and die.
The third is to ignore the root-causing measures. The root is the plant's "stomach." Like a human, the appetite is good. The body is good, the stomach is not good, and there is no absorption capacity. Fertilizing can no longer play a role. It can also cause damage. Many vegetable farmers did not realize the importance of rooting. They found that they were not growing well. They only knew that they would increase the amount of fertilizer. However, the more chemical fertilizers were used, the slower the recovery of the roots and the delay in the growth of medlars.
The fourth is the abuse of growth regulators. Any kind of growth regulator has strict application concentration and interval between different crops in different growth stages. If you use it blindly for your own sake, it will often affect the normal growth of the crop, which will affect the increase of yield.
The author investigates and analyzes the above-mentioned problems, summarizes the management experience of high-yield typical households in each district, and recommends that the following four improvement measures be done:
Change one's re-treatment to light defense to prevent it. The humid microclimate in the greenhouse is conducive to the occurrence of various diseases such as downy mildew, gray mold, and target spot disease. Based on the reasonable adjustment of temperature and humidity, regular drug use prevention is an important measure to control cucumber disease. "If you don't get sick, don't fight drugs, get sick and fight drugs," "it would rather kill and die." These wrong ideas should be reversed. In the use of drugs, qualified products produced by regular pesticide plants should be used.
Second change blind fertilization for formula fertilization. Studies have shown that cucumbers absorb nitrogen, phosphorus, and potassium in a ratio of 5:2:6. Fertilizing cucumbers should be based on this principle and should select suitable N, P, and K fertilizers, but also pay attention to calcium supplements, and zinc. The boron, iron and other trace element fertilizers can only be balanced with fertilization in order to meet the high yield requirements of cucumber. At the same time, we must pay attention to the rational use of humic acid fertilizers and biological bacterial fertilizers.
Three changes in topdressing topdressing are the combination of top dressing and root promotion. The growth of the cucumber plant aboveground and below the ground is related. When it is found that the growth of melons is not good or the melon is topping, the reason is actually rooted in the underground roots, indicating that the root system is affected by a variety of unfavorable factors and begins to yellow, and the number of new roots Reduced, in this case, increasing the amount of fertilizer is not conducive to the recovery of the root system. The correct method is to use less or less chemical fertilizers, change to humic acid water-soluble fertilizer or microbial fertilizer, with the use of rooting agents to facilitate Rapidly restore the number of root groups and achieve the goal of deep rooted and high yield.
Fourth, scientific growth regulators and foliar fertilizers should be used. There are many types of foliar fertilizers. If you do not understand the characteristics of a certain kind of foliar fertilizer and do not analyze the growth status of your own cucumbers, buying a kind of foliar fertilizer will go upwards and you will often backfire. The appropriate growth regulators and foliar fertilizers should be determined according to the trend of growth, the amount of melons, and the weather conditions so as to achieve high yield and high efficiency.
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