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Recently, many readers have asked whether the tomato plants in recent greenhouses have a large area of ​​wilting. Is this what is happening? 2.3 After fermentation Orange (Orange made enzyme solution navel orange), seized after the hand, breaking and other processes made of navel orange sauce.
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Companies registered capital of 35 million yuan, the end of 2014 the total assets of 48.69 million yuan, including fixed assets of 37.52 million yuan. The company's existing cooperation Orange cultivation base 7043.5 acres, the company production base is located in Jiangxi County Tech Industrial Park Chu Tan industrial area, covers an area of 120 acres, it has built a standard plant 9,000 square meters, Nissan 6000 kg Orange enzymes and other liquid enzyme products. Enzyme, known as enzyme, refers to a polymer substance having biocatalytic functionality. In the catalytic reaction system an enzyme, the reactant molecules are known as substrates, enzyme substrates by catalytic conversion to another molecule. Almost all cellular activity of enzymes involved in the process are required to improve efficiency. Similar to other non-biological catalysts, enzymes chemical reactions by lowering the activation energy to accelerate the rate of the reaction, most of the enzyme catalyzed reaction rate can be increased a million times; in fact, the enzyme is to provide an activation energy needs than another low way, so that more particles to have less than the activation energy of the reaction kinetic energy, thus speeding up the reaction rate. Enzyme as a catalyst, in itself is not consumed during the reaction, it does not affect the chemical equilibrium reactions. Positive enzyme catalysis, but also a negative catalytic effect, not only to accelerate the reaction rate, but also to reduce the reaction rate. And other non-living catalysts is different, having a high degree of specificity of enzyme, only a catalytic reaction or produce a particular specific configuration.
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According to the survey, in some of the winter greenhouse greenhouse cultivation in Shouguang City, there are some wilting phenomenon in the greenhouse. The specific symptom is that the upper leaves and the growing point are beginning to wilt and return to normal sooner or later. There were no obvious lesions on the leaves, and there were no obvious lesions in the roots; the disease progressed, and the area of ​​wilting expanded slightly, resulting in serious death of the whole plant. The roots of the diseased plants showed no abnormalities; the vascular bundles in the stems had no brown lesions, and the occurrence of the disease was not related to agricultural operations such as watering. The symptoms did not have a rapid infection and spread. From this, it can be concluded that it is not an epidemic, root rot, Bacterial wilt, blight, root nematodes, etc. What is it? For this reason, after consulting the vegetable experts, the author summarizes the following points:
Common factors that cause tomato plant wilting are:
First, the plots that have been continuously used for more than 3 to 5 years are seriously affected. There are also rotary ploughs to plow the ground. When the depth is less than 10 cm, the overly compacted sheds in the tilling layer are seriously affected. Second, excessive nitrogen fertilizer at the seedling stage, too long seedling age, tomato plants serious wilting is more severe. Or some greenhouses have high colonization density, too much nitrogen fertilizer, excessive growth of stems and leaves, and when the leaf area is too large, the incidence is serious. After the planting, the management measures are not suitable, or serious sheds such as whitefly, locusts and other pests occur. The third is that after a few days of rainy weather (foggy weather), it is fine; if the temperature is too high, it will cause severe disease. In addition, the degree of wilting in tomato plants has recently occurred more severely than in previous years; in the past, each year in the early spring, when tomatoes in greenhouses have wilted, they can naturally recover after several days of continuous management. This year’s situation is rather stubborn; the experts analyzed the reasons for this. The bad weather last year led to abnormal growth of tomatoes in greenhouses, decreased root absorption, and caused physiological plant wilting.
Preventive measures: If there is physiological wilting phenomenon, it should cover grasshoppers at noon during strong light, reduce light; timely topping, inhibit growth, reduce the consumption of water and fertilizer in the shoot; also can spray water on the wilt plants, also can ease Sickness (Don't rush to water, some growers report that after wilting vegetables, wilting is reduced). Although this method can supplement the water needed for transpiration of plants and temporarily alleviate wilting, it has damage to the root system of plants and reduces plant resistance. In later production, wilting occurs more easily. The correct approach should be: All agricultural management should be based on "momentum", water and nutrients can be added in the short term; the temperature should be steadily warmed and controlled when the temperature is regulated, and the temperature and temperature of the greenhouse should not be caused by the ups and downs of the tomato plant. Underground growth disorders. The foliar spray can be used: For example, Harvest No. 1 1000 times solution or 0.2% KH 2 PO 4 plus 72% agricultural streptomycin, but also suitable foliar spraying iron, zinc, calcium, boron, manganese, molybdenum, etc. Trace elements in fertilizers. In addition, the most important thing is to raise the roots and protect the roots, which can be used to flush Hai Li, and also to flush the roots of humic acid and microbial fertilizers to protect the roots of the plants.
To completely avoid this phenomenon, the following measures can be taken: 1 Do not weigh more than 3 years, soil before the cultivation of more than 25 cm deep. Or application of plough-free soil conditioners to spray the ground; or use Haili Chong Shi, can effectively improve the soil environment, is conducive to robust growth of roots, also can choose live particles EM bacteria. 2 appropriate sowing and planting, avoid high temperature and light period. 3 appropriate density of colonization, not too dense, seedlings to prevent leggy, seedling age to 7 to 8 leaves, the first flower bud is now appropriate. 4 When cultivating, attention should be paid to avoiding injury, timely prevention and control of diseases and insect pests, and simultaneous spraying of No. 1 or Yunda 120, to promote photosynthesis, to produce more nutrients, and to ensure root growth and development. 5 fertilization formula fertilizer, topdressing should be combined with nitrogen, phosphorus, potassium, while with a variety of high-quality biological bacterial fertilizer such as fertilizer field, live EM bacteria.