For the technical difficulties in the cultivation of spring cabbage and radish in spring and summer season in our province, we promote the selection of varieties with strong glutinous, cold-tolerant and heat-tolerant varieties, and promote techniques and methods for avoiding low-temperature chilling and freezing damage under anti-seasonal cultivation conditions. Key technologies for early convulsions, key techniques for summer rain protection, pest control nets, key technologies for different cultivation modes (early sowing, early spring sowing, summer cultivation), management under different conditions (shelf or simple cover), and harvesting and marketing . Can effectively solve the practical problems of Chinese cabbage and radish in the off-season cultivation, improve the anti-season production level of Chinese cabbage, radish, etc., and achieve an annual balanced supply. Technical points: 1. Variety selection. The first key factor for the success of the anti-season cultivation is the selection of varieties. In the spring, it is necessary to select cultivars that are resistant to bolting and early maturing, that is, varieties that are strong in winter. Radish can be selected from white spring, big root, white marble, Tianzheng spring jade and other varieties. Chinese cabbage can be used Spring and Autumn King, Tian Zheng Chun Bai No. 1, Chun Lu Bai No. 1, Chun Lu No. 1, Qi Chun Bai No. 1. In the summer, we must choose heat-resistant, disease-resistant and high-yielding varieties, such as radish varieties such as Xia Zaosheng No. 3, Xiaqiu Mino, Baiqiu Mino, Baiyuwang, etc., Lubai No. 6, Beijing Xiaoza No. 56, Xiabai 45 and Xiabai. 50 other cabbage varieties. To prevent premature picking, new seeds should be used. 2. Suitable sowing. In order to prevent the occurrence of pre-existing convulsions, under normal circumstances, the average daily temperature in spring is stable above 13 °C when exposed to the ground, from the end of March to early April in Shandong. If a small shed is used for covering cultivation, it can be sown from late February to late March. The temperature in the shed is not lower than 8°C to prevent vernalization and extend the period of vegetative growth so as to increase the yield. Summer cultivation can be planted in June and July. 3. Ridge cultivation. The sandy loam soil with good drainage and irrigation conditions should be selected. After the rain or watering, the drainage will be faster and the ground temperature will rise faster in the spring. Using a single row of small high ridge cultivation, this will not only drain well, but also increase the area of ​​solar irradiation. The spring will help increase the temperature of the ground, and the summer will facilitate ventilation and dehumidification, which will effectively reduce the occurrence of pests and diseases. 4. Reasonable coverage. Immediately after sowing in spring, the mulch film should be covered. The mulching film can significantly increase the ground temperature by 2 to 3°C. Moreover, the number of watering can be reduced in the early stage of low-temperature growth to prevent the ground temperature from decreasing. In the summer, it is possible to use the leisure winter greenhouse or shade the greenhouse to cultivate rain, which is the most effective measure to reduce the occurrence of pests and diseases. Cabbage should be planted in a protective facility and then transplanted. 5. Timely seedlings, seedlings or transplants. After the seedlings were unearthed and the seedlings were planted in time, they were not crowded and the radish was selected to retain the strong seedlings in the "breaking belly period" for the fixed seedlings. Generally medium-sized breeds are 18-25 cm apart, 16-20 cm long, 25-35 cm long, and 25-30 cm long. The Chinese cabbage planted with seedlings and seedlings should be seeded in spring with a strict seedling age of about 40 days, and the number of leaves should be 6 to 7. When selecting plants for sunny daytime and timely planting, the seedling age must not be too long. The seedling age in summer is about 20 days, and the number of leaves is about 4 pieces. Select the soil in the cool afternoon and transplant them. 6. Strengthen the management of fertilizers and waters, and promote it in the end. In the off-season cultivation of Chinese cabbage and radish, fertilizer and water management should be strengthened. Generally, no seedlings are planted. In the end, the roots or leaves of the flesh are rapidly enlarged and harvested before the convulsions. In the case of applying basic fertilizer (generally 3500 to 4000 kg of organic fertilizer per acre, and 20 to 30 kg of NPK fertilizer), 20 kg of ammonium sulfate can be applied to each acre and applied in two batches. After the breaking of the bellies and the rapid expansion of the fleshy roots, Chinese cabbage was in the rosette period and the balsamic period. In addition, in the middle and late stages of growth, spraying 0.5% urea water and appropriate amount of potassium dihydrogen phosphate to promote growth every 15 days can effectively prevent unripe convulsions and flowering. 7. Pest control. (1) Insect pests: The cultivation of spring should pay attention to the control of aphids and spotted flies, which can be controlled by chemical agents such as chlorfenapyr, chizide, and ephedrine. Summer cultivation in addition to control of aphids, spotted fly, but also should prevent cabbage caterpillar, night moth and other pests, can be used Baicao one, hundred insect net or 48% of the music to control. (2) Diseases: mainly downy mildew, soft rot, virus disease, etc. Downy mildew can be used at the beginning of the disease with 40% aluminum phosphate wettable powder 200 to 300 times, or 50% manganese manganese 500 to 600 Double liquid prevention. At the beginning of the soft rot disease, 200-300 grams of high-yield spirit per mu is applied to 100 kg of water, or sprayed with 3000-4000 times of agricultural streptomycin wettable powder. 8. Harvest in due course. Harvesting is a key technical link in spring production. When the radish roots are fully swollen, the color of the radish will be reduced, and harvesting should be carried out in time. Otherwise, hollow, convulsions, cruelty, and other phenomena will occur, and the value of commodities will be lost. Cabbage does not have to be fully grown after the leaf ball is harvested, generally 5 to 6 percent of the heart can be harvested and marketed in batches.
The routine postpartum administration of oxytoxin or antibiotics is unnecessary. But if the animals got postpartum problems, we recommend these postpartum care medicines: Oxytocin Injection, Cloprostenol Sodium Injection, Estradiol Benzoate Injection. All the veterinary medicines are GMP certified and has wide market and good reputation in China. we are now engaging in open overseas market with our high quality and enonomic price veterinary medicines.
Postpartum Care Medicine,Professional Postpartum Care Medicine,Health Postpartum Care Medicine,Postpartum Care Nutrition Medicine Jiangxi Institute of Biological Products Inc. , https://www.jxinstitute.com