The winter temperature is lower than usual, coupled with more rainy weather, the grafted cucumbers of overwintering larvae generally show a difference in scorpion growth, melon stalks are slowly growing, and gray mold and sclerotia are heavier, resulting in a higher vegetable market price and planting yield. Low situation. In recent days, the author has conducted a detailed investigation into the shed area, and proposed the following five management measures for the current production situation for the reference of the vegetable farmers.
First, temperature management
In the temperature management, we must coordinate the relationship between the aboveground and underground, long pods, and melons. We should control the temperature between 27°C and 29°C in the sunny morning, and control the temperature between 20°C and 22°C in the afternoon and 10°C～12°C in the early morning. To prevent the root from being damaged due to the low temperature of the greenhouse, to prevent the temperature from being excessively high, to make the root system obtain insufficient nutrition, and to reduce the frost resistance of the plant. In case of overcast and cool temperature, temporary warming should be carried out. The corn shaft or firewood can be used to ignite the smoke outside the shed and put it in the waste iron drum. The shed can be placed in several places. This method is simple and effective.
Second, moisture management
In the cold season, we must strictly control watering, not drought or pouring. When watering must be done, it should be selected according to the weather forecast on a sunny morning. After watering, there should be 2 to 3 sunny days. The amount of water should not be too large, so as to avoid injury. The combination of water and water applied nutrients and rooting agents, such as per mu with Jingnong root root strength agent 1500 ml + gene activator 500 g + naphthalene acetic acid 500 ml, with obvious hair root strong and strong, cold production increase effect.
Third, nutrient management
In winter, the ground temperature is low, soil nutrient conversion is slow, and the root absorption capacity is poor. The high-level chelated ecological formula fertilizer, biological water rush fertilizer, or humic acid fertilizer should be used for topdressing, so that the mantle has good hair roots, and the strong fruits grow rapidly. obvious. The specific amount used should be reasonably determined based on the nutrient content of the selected fertilizer, the strength of the plant, and the amount of the fruit, avoiding the use of too much fertilizer to cause root burning. Foliar fertilizer is best to use pure product potassium dihydrogen phosphate 300 times + Yi Miao 3000 times liquid + plant essence 1500 times, 7 to 10 days spray 1 time.
IV. Disease Prevention
The low-temperature and high-humidity shed environment can easily lead to the spread of gray mold, sclerotinia, and bacterial diseases. It is necessary to pay attention to regular medications to prevent diseases. The spray agents with better effects are: 70% thiophanate-methyl 600x solution + 25% methamphetazole 600x solution, or 70% pyrimethanil 1500x solution + 80% ethyl allicin 1500x solution, or 50 % of procymidone 800 times + 50% of trichloroisocyanuric acid 800 times. When rainy weather or high humidity in the shed after watering, it is best to use dust or aerosol control, its efficacy is significantly better than the spray control method.
V. Irrigation
In the low-temperature season, the main reason for the poor growth of melons and melons is the root system, which is characterized by the atrophy of the root groups, the lack of new roots, and a serious decline in root absorption capacity. To solve this problem, efforts should be made to improve insulation and warming. Another effective method is to use the rooting solution to irrigate the roots. The specific formula is (15 kg of water to the dose): Jingnong root root strength agent 50 ml + gene activator 25 g + cytokinin 20 g + power Pioneer 40 grams + root Fuxing 20 ml, 50 to 100 ml per strain of liquid, 2 inches deep from the root 2 inches deep hole, the liquid injection to facilitate the root absorption.
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