The price of cucumber before the Spring Festival is generally the highest price in a year. In order to obtain high yields before the farmers, the farmers usually increase the amount of melons, which will “grab” the nutrition of the plants. As a result, the cucumbers generally grow weaker after the year, the leaves are yellow, the melons are shorter, and the melons are moved up. Serious melon topping occurred in the shed. If you encounter even cloudy days, it will easily lead to "resting" phenomenon, and the price of cucumber after the holiday is often relatively stable. If you do not strengthen management, the loss is quite serious. To avoid this problem, the following measures can be taken to prevent it in advance.

First, the cause of the cucumber "rest"

　　 1. Too much melon. Due to the high price of cucumber during the Spring Festival, in order to increase production, vegetable farmers often take improper measures:

(1) More melons. All the melons that can sit still are left, and the extra female flowers are not removed.

(2) The harvest is not timely. Because the price of melon is unstable, sometimes in order to wait for the high price, the melon that has grown up is left on the melon, causing "falling". The result is that the balance between vegetative growth and reproductive growth of the plant is broken, and the organic nutrient consumption in the plant is excessive. 2. Improper fertilization. In production, there is a phenomenon of “multiple, chaotic, and miscellaneous” in the fertilization of vegetable farmers. In particular, excessive use of compound fertilizer makes the soil solution concentration too high, causing damage to the roots, rust or local necrosis of the root tip, which weakens the absorption capacity of the roots and affects the normal growth of the plants.

　　 3. Overdosing. During the wintering of greenhouse cucumbers, if the environment in the greenhouse is not well regulated, it is highly prone to disease. Many vegetable farmers only pay attention to chemical control, but ignore agricultural measures. The interval between drugs is short, the concentration is large, the phytotoxicity is formed, the leaves of the plants become wrinkled, the photosynthetic function is reduced, and the hormonal pesticides are applied, causing physiological imbalance of cucumber plants. The cucumber growth point cannot grow normally.

　　 4. Improper watering. Watering does not pay attention to the weather conditions. If it encounters adverse weather such as cloudy weather, low temperature and strong cold current after watering, the ground temperature is lower than 12 °C, and the relative humidity of the soil is higher than 85% , which will inhibit the growth of roots. The growth impact is greater.

Second, the cucumber "rest" defense measures

　　 1. Strengthen plant adjustment. It is important to note that when the cucumber is vine, it cannot be too low, and too low is not conducive to the normal growth of cucumber. After the vines are planted, the cucumber plants are maintained at about 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 plants with more melons, it is necessary to properly disperse the melons, and the melons are not visible. Otherwise, it is easy to cause "breaking" in the middle and late stages. The yellowed leaves at the bottom should be removed in time to reduce consumption.

　　 2. Strengthen the lighting management even in cloudy days. In the deep winter, many vegetable farmers only consider the insulation without pulling the grass. I have done experiments: when the cloudy day is approaching noon, the grass is opened. If the wind is properly released for 2 hours, it will not lower the temperature of the greenhouse, but will increase the temperature by 2 °C. After a cloudy day, the grass can not be completely uncovered, and one should be uncovered to avoid the phenomenon of "flashing seedlings".

　　 3. Pay attention to fertilizer and water management. During the depths low temperature, low light, watering frequency can not be too frequently, generally water pouring 1 to about 20 days, not flood irrigation. Also note that after watering, the temperature in the shed should be increased to above 30 °C before the air can be released, and the air outlet should be small to large. Fertilizers are generally applied with water. Fertilizers containing humic acids or amino acids that are easily absorbed by cucumbers should be applied. The dosage should not be too much.

　　 4. Strengthen disease prevention and control. In the deep winter, cucumber is prone to downy mildew, brown spot, gray mold, bacterial angular spot disease, etc. For these common diseases, it is necessary to establish the idea of ​​“preventing prevention and comprehensive prevention” to ensure that there is no disease in the shed. Plant. In addition, during the deep winter period, due to the untimely release of the wind, it is very easy to cause phytotoxicity after the medicine is sprayed in the shed, so the concentration should be strictly controlled when using the medicine.