When is the Chinese cabbage suitable for planting? How should I be?
The planting time of Chinese cabbage is quite different because of different regions and seasons. This paper introduces the efficient planting techniques of Chinese cabbage in the northern autumn. Seeds, vegetables and seed markets are sold in all counties and cities.


1. Select good varieties. There are many varieties of Chinese cabbage, which can be divided into three basic ecological types: straight tube type, original head type and oval type. However, due to the reason of growing season, it is necessary to choose the middle and late mature varieties of disease resistance, cold tolerance, high yield and storage resistance. The seeds of Chinese Cabbage Cultivated by Shandong Hua Liang seed company are of high quality and high yield.


Two. Sowing time. Under normal circumstances, it is advisable to sow 3 to 5 days before and after autumn, and the high temperature year can be postponed to mid August. Late maturing varieties with long disease resistance and long growth period can be sowed early, and medium maturity varieties with short maturity can be sowed for several days.


Three. Preparation before sowing. Chinese cabbage can not be continuous cropping, and can not rotate with other cruciferous vegetables. This is one of the important measures to prevent pests and diseases. 5 - 10 cm deep ditch, first ditch the ditch water, water infiltration, the seeds evenly spread in the ditch, and cover 0.8 - 1 centimeters of thick soil, each mu of 0.5 kilograms of seed, live big white cabbage after the sprouts are unearthed, to keep the ground wet and reduce surface temperature measures. In the absence of rain, usually water 1 times on the day of sowing or the next day, so as to make the ridge wet through, and sowing second times of water for third days to make most of the sprouts unearthed.


The management of the seedling stage. The management of the period from the unearthed sprouts to the period of the regiment. At this time, it should be time seedlings, and in 2 - 3 or 4 - 5 pieces of true leaves, each seedling is once removed, and weeds, disease seedlings and weak seedlings are removed. When 6 pieces of true leaf were planted, the seedlings should be fixed and cultivated in time to avoid damaging the roots and damaging the leaves. The cultivation should be shallow and not deep. The direct seeding is usually planted in 5 - 6 pieces of true leaf.


Transplant and colonize. Seedling age is generally 15 to 20 days, and 5 to 6 true leaves of seedlings are suitable for transplanting. Transplanting is best carried out in the afternoon. The suitable density is determined according to the characteristics of the variety. Water immediately after planting. After every morning and evening, water is poured once a day for 3 to 4 days in order to keep the seedlings alive.


Four. The management of fat and water


1. The yield of Chinese cabbage is high and the amount of fertilizer needed is large. Top dressing should be determined according to different growth stages and seedling conditions. The seedling stage is generally not fertilized. If the bottom fertilizer is insufficient, the first time can be 3 to 4 pieces of true leaf period, and 10 kg of ammonium sulfate per mu is applied on both sides of the seedlings, and water is put on the two sides of the seedlings, and immediately water is used, which is called "lift the seedling". The second time, after the seedling or seedling transplanting, apply 15 - 20 kg of ammonium sulphate per mu on the two sides of the ridge, called "hair tree fertilizer", and third times in the lotus period, every mu. Ammonium sulfate 25 - 30 kg, calcium superphosphate 10 - 15 kg, fertilizer into the trench or hole, and then a little earth raising the ridge, and then water, called "big fertilizer", fourth times in the middle of the ball, each mu of ammonium sulfate 15 - 20 kilograms, can be washed with water, called "heart fertilizer."


2. Water. Chinese cabbage from the tree to the lotus seat period, the temperature is declining, the weather is mild, this can be properly watered, the end of the lotus seat can be properly controlled for several days to third times after fertilizer. Chinese cabbage needs to have the most moisture after entering the heading stage. Therefore, just after finishing the seedling, it is necessary to irrigate the seedlings. Then 2 - 3 days are then poured in second times. This time is very important. When the soil is dry and cracked, the lateral root will break, and the fine roots will die and affect the ball. After that, water should be watered once every 5 to 6 days to keep the soil moist.


Five, bales and harvest. In the late growth stage of Chinese cabbage, the weather is changeable and the temperature is decreasing. Usually, 10 to 15 days before harvest, stop watering, hold the lotus leaf Ye Fuqi, hold the leaf ball, and then tie the leaves with soaked sweet potato seedlings or millet straw. Make the heart more tight and continue to grow. 2 to 3 days before the snow should be harvested in time and dry in the field.