Cultivation Techniques
Summer sowing Chinese Cabbage production season is in midsummer (June-August), with high temperature and drought early in the season and hot and rainy in the later period. High temperature and drought are prone to viral diseases and dry heart disease; hot and rainy are prone to soft rot and downy mildew; insects are also very serious, and not only directly harm cabbage, but also spread the virus, leading to increased disease and epidemic. Based on years of planting experience, the following cultivation points are summarized for reference.
1. Choose a good variety
High-quality varieties should have the characteristics of high temperature resistance, strong nodule resistance, disease resistance, short growth period, and good commercial quality. Such as Xiabai 45, Xiabai 50 and other summer special varieties have the above characteristics, in particular the ability to withstand high temperature 37 °C, and a wide range of adaptation, which Xia Bai 45 in May 2001 passed the approval of Shandong Crop Variety Approval Committee.
2. Choose suitable land and apply base fertilizer. High ridge cultivation
In order to control the occurrence and damage of pests and diseases, land plots with high dryness and convenient irrigation and drainage should be selected. Due to the short growing period of summer cabbage varieties, in order to promote its rapid growth, multiple base fertilizers should be paid attention to. In general, 3,000 m3 of high-quality manure is applied per 667 m2, and 40-50 kg of compound fertilizer containing NPK. If it is not sandy land, ridge cultivation is preferable. On the one hand, drainage and irrigation are convenient. On the one hand, ventilation and light transmission are good. General ridge distance 50-55 cm. The ridge width is 20-30 cm and the ridge height is 10-15 cm.
3. Appropriate sowing, reasonable close planting to ensure that the seedlings are fully grown
The best sowing date in Shandong is in the middle and early June. Other regions can choose suitable sowing dates according to local climatic conditions and past planting experience. Generally 3000-3500 plants are planted per 667 square meters. In order to ensure that the seedlings are fully grown and seedlings are sown, they can be planted on the ridge and can also be planted according to the determined spacing of the seedlings. If the waterlogging condition is not good, you can sow in the ditch or inside the hole, and then cover the soil 0.5-1.0 cm. The water level should be poured and watered immediately. After 2 days, it should be poured 1 time and 3-5 days can emerge. After the emergence of the ridge to keep wet see dry. Should be divided between seedlings, seedlings in time to make up the seedlings, 2 cotyledons began when the seedlings, 5-6 true leaves when the seedlings for the appropriate time.
4. Strengthen fertilizer and water management, prevent disease and pest control
It is necessary to make early attacks on fertilizers and promote them in the end. In the early stage, the ball can be top-dressed, and in the case of basal fertilization, 25-30 kg of urea can be topped every 667 m2 (also a 2:1 mixture of topdressing urea and ternary compound fertilizer). After the topdressing, the ridges are watered. Generally, the fertilizer can be recovered once. After setting seedlings, we must keep the ridges wet and dry. During the ball stage, we must pay attention to watering, because this period is the period when the Chinese cabbage has the largest amount of water, and it is during the hot and hot period from July to August. The temperature is high and the evaporation is large. If water is lacking, dry heart disease can easily occur. . Usually 1 to 3 times a day to water, but do not flood irrigation. Stop watering 5 days before harvest. If you encounter heavy rain, drain it in time.
Focus on prevention and control of soft rot disease and dry heart disease. Anti-soft rot can be sprayed with neemoxime 400 times in the early stage of cabbage Chinese cabbage, 500-600 times that of antibacterial agent 401, and 600 times that in the case of bacteria. When spraying, pay attention to the petiole and the root. The diseased plants were found to be removed in time. To prevent the spread of germs, a layer of quicklime could be sprinkled around the diseased plants and sprayed 2-3 times successively, spraying once every 7-10 days. At the beginning of the ball, a 0.3% calcium chloride solution was sprayed simultaneously with the spray to control the occurrence of dry heartburn. In the prevention and control of pests, it mainly controls Pieris rapae, Aphids, and Plutella xylostella, etc. The seedling density is controlled in time according to the density of the larvae. The liquid must be sprayed strictly, and special attention must be paid to spraying the back of the leaves. Stop spraying before 10 days before harvest.
5. Early harvest
After harvesting the ball tightly and timely harvesting, the field permeability can be increased and the pests and diseases can be reduced. The sooner the general listing is, the better the benefits will be, and the late harvest will easily lead to fissile ball, which will increase the pests and diseases and affect the quality and efficiency of Chinese cabbage.
Desk Mini Fans,Portable Mini Fan,Mini Fan USB,Mini Fan Cooler,Handheld Mini fan
Ningbo Shuangtuo International Trade Co., Ltd. , https://www.nbst-sports.com