The production of shallots in the summer mainly involves the four steps of species selection, planting, field management and pest control. The shallots planted in May were harvested in August. At this time, the quality was good and the price was high. The output per mu was 4,000 kg and the output value was about 8,000 yuan. Variety selection choose high temperature, good varieties of goods. The Yiwu region in Yiwu of Zhejiang Province was selected as a local chives variety and was planted in batches in May. This variety grew well during this period. In the period of July-September, there was no yellow head in the high-temperature period, and the commodity was good. The cultivation advantages in summer were obvious. Colonization generally uses land that has not been planted with green onions and garlic for 2-3 years. If the second year of continuous cropping, 100 kg of lime per acre should be sterilized, then planted after sun exposure. Slightly sandy red mud is most suitable for the cultivation of scallions. Generally, the sorghum width (even ditch) is 1.5 meters and 9-10 lines are planted. The hole distance is 15 centimeters and 2 points per hole. Plants are preferably deep, but they do not exceed 5 cm. This increases the length of light blues and increases yield and quality. Due to frequent rainstorms in the summer, the soil is easy to compact. If the planting is too deep, the bottom rhizosphere will have poor permeability, which will cause poor growth and even light blue rot. If it is planted in shallow depths, although the tree is growing early, the roots are green and the commodity is slightly poor. Basal fertilizer is best for cultivating 3,000 kg of fertilizer per acre (pig excrement, chicken excrement, etc.) and 100 kg of compound fertilizer per acre. After planting, planting water was planted on the day of water planting, and watering was performed once every 7-10 days. The roots of chives are underdeveloped, with shallow distribution and weak water absorption capacity in the roots. Therefore, the drought should adhere to the groundwater irrigation to prevent drought and prevent stains. After survival, horse water can be fed at 4 o'clock on a sunny day. Therefore, the water and soil temperatures are the same, and after the sun comes out, the water in the ditch has basically dried out. If water is sprayed at noon, the temperature difference between water and soil is large, and it is not only easy to burn the roots, but also easily induce a variety of diseases. Two days after weeding and planting, 60 grams per acre is sprayed on the gourd, and 33% of the herbicide can be sprayed with 100-200 ml of water per acre. When using herbicides, it should be noted that when the temperature is high or the soil moisture is high, the amount of herbicide is low, the temperature is low, or the soil is dry, the amount can be increased appropriately. The general temperature of more than 30 °C can not be used, otherwise it is easy to produce phytotoxicity. Since the onion root system is less, loose soil may cause damage to the roots, so the application of herbicides is more common. Top dressing of rainy days, withdrawal of urea or fecal water, should be applied less frequently, thin fertilizer applied. If urea has not been applied to rain, drip irrigation facilities should be turned on or water sprayed with a kettle to prevent burns. Pest control The main insect pests of chives include the onion thrips and beet armyworm. The control of onion thrips can be achieved by using 33% of water to kill 500 times of chlorine or 20% of good year of winter 1000-2000 times of spraying. By July-August, it is better to control Spodoptera exigua in the evening with 20% of rice full of suspension agent 1000 times. Because Spodoptera exigua 3-4 years of age, its food intake increased significantly, its food intake increased significantly, and will wear through the onion tube into the onion tube feeding to leave the epidermis overnight, causing a large area of ​​leaf holes, coupled with incense Onion surface with wax powder, liquid is not easy to stick, so the use of pesticides control effect is minimal. In the use of pesticides should be added equal or half the amount of elimination liquid, but the best method is to use black light traps to kill adults, the reduction rate of insects mouth up to 70%. The diseases of chives include gray mold and disease. Commonly used medicinal agents are 800 times resistant to dry fungus and 600 times liquid of acaricidal wettable powder. The specific production is mainly prevention. When lime is used to plough the land, it can effectively reduce the occurrence of pests and diseases.
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