As we all know, the price of cucumber before the Spring Festival is generally the highest price in a year. In order to achieve high efficiency in the past years, vegetable growers generally increase the amount of melons and melons, and thus “predatory†the plant nutrition, resulting in weak growth of cucumbers, yellowing of leaves, shortening of melons and parts of melons. On the move, many sheds have suffered from severe melon peaks. If it encounters even cloudy days, it can easily lead to a “stop†phenomenon, and the prices of cucumbers after the holidays are often relatively stable. If the management is not strengthened, the losses will be quite serious. In order to avoid this problem, generally take measures to prevent it before the Spring Festival.
I. Reasons for the occurrence of cucumber "resting"
1, stay too much
Due to the high price of cucumber during the Spring Festival, vegetable farmers often take improper measures to increase their output:
(1) stay Guaduo. All the melons that can sit are left, and the excess female flowers are not removed.
(2) Harvesting is not timely. Due to instability in the price of guarana, sometimes in order to wait for high prices, the melons that have already grown up are left on the quails, causing "falling into torrents". The result of this is to break the balance between vegetative growth and reproductive growth of the plant, which results in excess organic nutrient consumption in the plant.
2, improper fertilization. In the production, there are many “chaos, chaos and miscellaneous†phenomena in the fertilization of vegetable farmers. In particular, the excessive use of compound fertilizers makes the concentration of soil solution too high, resulting in root damage, rust color or partial necrosis of the root tip, weakening the absorption capacity of the root, affecting the normal growth of the plant.
3, overdose. During the wintering of cucumbers in solar greenhouses, if the environment in the greenhouse is not well controlled, it is extremely prone to diseases. Most vegetable farmers only pay attention to chemical control, neglecting agricultural measures, making medicines short time intervals and concentrations exceeding the standards, resulting in excessive use of fungicides, the formation of phytotoxicity, the shrinkage of plant leaves, and decline in photosynthetic function. Hormone pesticides cause physiological disorders in cucumber plants and prevent the growth of cucumbers from growing normally.
4, improper watering. Farmers do not pay attention to weather conditions when watering, nor do they analyze the pros and cons of watering according to the law of plant growth. If the watering meets the influence of adverse weather such as continuous cloudy days, low temperature and strong cold current, the ground temperature is lower than 12°C, and the relative humidity of the soil is higher than 85%, causing the roots of cucumber to be rooted, thus inhibiting the growth of roots, The impact of growth is greater.
Second, cucumber "stop" defense measures
1. Strengthen plant adjustments. It is necessary to pay special attention to the fact that when cucumbers fall, they cannot fall too low at once. Too low is not conducive to the normal growth of cucumbers. After falling, the cucumber plants are maintained at 1.5 meters, ensuring that there are more than 15 functional leaves on the plants to ensure normal photosynthesis and maintain normal growth. In addition, for more plants sitting melon, should be appropriate sparse melon, cut can not see the melon stay, otherwise it is easy to cause break in the middle and late. The yellow leaves at the bottom should be removed in time to reduce consumption.
2, even cloudy days to strengthen light management. Before and after the Spring Festival, there are many snowy weather, many vegetable farmers only consider the insulation and not pull grass weir. I have done experiments: When the cloudy days near the noon when the grass is pulled open, if the appropriate release of wind for 2 hours, not only will not reduce the temperature of the greenhouse, Instead, it will increase by 2°C. Even when the cloudy sky suddenly turns to fine, it is not possible to suddenly uncover all the grasshoppers. They should “unveil the flowers†​​so as to avoid “flashing seedlingsâ€.
3, pay attention to fertilizer management. During the deep winter, the temperature is low, the light is weak, and the number of times of watering can not be too diligent. Generally, water can be poured in about 20 days, and flood irrigation can not be performed. Also note that after the watering, wait until the temperature in the shed increases to above 30°C before releasing the air, and the air outlet should be small to large. Do not overdo it at one time, causing flicker phenomenon. Fertilizers are usually flushed with water, and fertilizers containing humic acid or amino acids that are easily absorbed by cucumbers should be applied. The amount of one-time use should not be excessive.
4, strengthen disease prevention and treatment. In winter, cucumbers are susceptible to downy mildew, brown spot disease, gray mold, and bacterial keratopathies. For these common diseases, we must establish the idea of ​​“prevention, prevention, and comprehensive prevention and control†to ensure that there is no disease in the shed. Plants. In addition, during the deep winter, due to lack of timely ventilation, sheds are prone to phytotoxicity after spraying. Therefore, when using drugs, the concentration should be strictly controlled, and do not mix 35 pesticides to reduce the occurrence of injury.
Rhubarb Extract,Gastrodia Elata Extract,Dried Rhubarb Tea,Section Tea
Lixian Spring Pharmaceutical Co., Ltd. , https://www.lxctyy.com