The bitter vegetable, also known as the chives, is a perennial wild vegetable that people like to eat. It not only has high nutritional value, but also has medical functions such as detoxification and detoxification. Bitter herbs are very adaptable and can grow in fields and roadsides. If the plastic greenhouse is cultivated artificially, it will produce more than 1,000 kilograms per mu, compared to 40-50 days in the city of Ludi. The cultivation techniques are as follows: 1. Seeding time The cultivation period for the cultivation of bitter herbs in the greenhouse is from late July to mid-August. Late seedlings, cold resistance, drought resistance, production decline. Because bitter seeds do not have a dormant period, seeds can be sown and produced in the same year. For the first time, wild seed can be picked. 2, sowing method is conducive to the growth of bitter herbs, to choose loose and fertile plots of sowing, sowing before deep-sowing fine ploughing, combined with soil preparation of 3,000 kg of organic fertilizer per acre, and then press the shed area to do 畦, generally 畦 1 Meters, open face 8 cm deep ditch 7, 12 cm from the groove. The bottom water is soaked. After the water seeps, the seeds are sown in the ditch, and the ditch is covered with fine soil. The surface of the bowl is covered with a plastic film and the grass is covered with a film to prevent the high temperature of the sun from affecting germination. The general sowing rate per square metre is 3 grams. 3, field management 7-8 days after sowing can be planted, the roots of the newly unearthed seedlings are weak, to keep the soil moist by spraying water, to prevent dry seedlings from watering 2-2-3 days later, loose soil, can inhibit the soil Water evaporation, but also promote root growth. Weeds are the main factor affecting the normal growth of seedlings, so they must be removed at any time. After the beginning of autumn, the weather is cool, the growth of bitter herbs is relatively strong, and in order to promote its thick roots and accumulate more nutrients, it is necessary to chase a thin manure in combination with irrigation, 1,000 kg per mu. 4, the second year, management of sheds: In order to make bitter vegetables and the morning market, but will not suffer from frost damage, generally in March, the middle and upper film. After the soil is thawed, weeds are removed from the ground. When the depth of the ground reaches 5 to 4 degrees Celsius, the bitter herbs begin to sprout. Fertilizer: If there is little snow in winter and the soil moisture is not good, water should be irrigated 3 to 5 days after returning green. The water level should be soaked in 15 cm soil layer. The amount of water passing through the ground will reduce the temperature and affect the growth. Later, according to soil conditions , Irrigate 1--2 times of water before harvest to meet the need. Bitter herbs are mainly leafy and require more nitrogen. In order to obtain high yields, it is necessary to top-dress the leaves at the 2- to 3-leaf stage and spray 0.5% urea solution. Humidity: bitter vegetables like cold weather conditions, high temperatures in the shed is not conducive to growth, so when the shed temperature reaches 25 degrees Celsius, ventilation and cooling should be timely, to ensure that the temperature is around 20 degrees Celsius. When the leaves grow to more than 4 cm, the market can be harvested.
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