Oil sunflower is an oil sunflower with a short growing period, wide adaptability, drought tolerance and thinness, easy management, and high oil yield. Specific cultivation management measures: 1, choose a good seed. Good selection of locally grown hybrid generation seeds with good yield, high oil yield, and strong disease resistance, such as the United States short large head 567DW, 667DW and so on. 2. Selection and Site Preparation 2.1 Selection. You should avoid heavy tricks and pay attention to rotation. Continuous crop disease is serious, the plant is short, the flower disk is small, and it is prone to premature aging, and there are many empty grains, which can reduce the yield by 5-20%. 2.2 Soil preparation. Deep-spotting the land preparation and timely protection. Dip 20-25cm deep before planting. According to the conditions of fertility, 2-3 square meters per acre Shinongjiafu, 20-25 kg of superphosphate, 10-15 kg of ammonium bicarbonate, 10-15 kg of potassium sulfate. Or Mushi Sanyuan compound fertilizer 30-40 kg. 3, timely broadcast. The oil sunflower is very resistant to low temperature and should be sown as early as possible under the condition of ensuring seedling emergence. Plastic film coverage was performed in early March (before and after convulsions). The sowing date for sowing in bare land is from late March to early April (usually 5 cm above ground temperature can be sown at above 10°C). Summer sowing in late June to early July. Plants are generally planted at equal intervals, with a 60-foot row spacing and a 30-33 inch spacing. According to soil conditions, suitable soil density is 3300-3500 plants/mu, suitable soil density is 3500-3800 plants/mu, and sowing method is better. In order to save the use of species, sowing can be used single and double pods. The on-demand seed amount is 400-500 grams per acre. The sowing should not be too deep. Generally, it should be controlled at 3-5? When the sensation is good, the depth should be 3cm, and when the sensation is poor, the depth should be 5cm. 4, field management 4.1 timely check seedlings to ensure seedlings. Oil sunflower is a dicotyledonous crop, with large cotyledons and difficulty in emergence. This is especially true if the quality of the soil is poor and the weather is dry and rainy, it can easily cause seedling deficiency. On-demand seedlings can be planted between rows. When the seedlings are missing, they are transplanted and planted in time. Immediately after the seedlings are filled, they are watered. 4.2 seedlings and Dingmiao. When the first sunflower leaves are planted on the true leaves, the second seedlings or the third pair of true leaves are planted. 4.3 Cultivate weeds. Two or three times of cultivating and weeding should be carried out during the growth period of the oil sunflower. The first cultivator is combined with the seedlings, the second cultivating and cultivating is carried out one week later, the third cultivator is carried out before the mulching, and the cultivator is used to cultivate the soil, and the soil height is 10cm. To promote the deep roots of oil sunflower roots to prevent lodging. 4.4 Hiccups and leaves. Some varieties in the disk formation period, the middle and upper axillary buds will grow branches, although it can grow disk, but usually small disk, the grain is not full, but also affect the development of the main stem disk. Branches should be removed promptly to promote the growth of the main stem disk. The occurrence of lesions on the leaves, and the lower leaves, yellow leaves should be promptly removed in order to facilitate ventilation. 5. Fertilizer and water management The absorption of fertilizer by sunflower is less in the early period and more in the later period. Spring sowing of sunflower oil in the application of base fertilizer, generally do not need top dressing. When no seedlings were sown at the time of sowing, the nitrogen and potassium fertilizers could be topdressed in 7 to 8 pairs of true leaves, and 25 kg of Ammonium bicarbonate could be applied to Mushi, or 8 kg of urea and 15 kg of potassium chloride. Summer sowing sunflower seedlings can be topdressed with 5-7 kg of urea per acre, buds before flowering combined with watering, applying 15-20 kg of urea per mu, 10-15 kg of potassium sulphate, fertilizing depth of about 10cm. The early stage of oil sunflower requires low water and strong drought resistance. It is advisable to carry out seedlings to promote root growth. When the surface water accumulation, it should be drained in time to prevent Rotten root died. 6, timely harvest. The oil sunflower must be harvested in time after it matures. The suitable period for harvesting was yellowing of the stems of the plants. Most of the leaves were yellow, drooping, or detached. The back of the flower disk became yellow-brown, and the lingual petal was dry and shedding, and the peel became hard. After the harvest, dry it in time to prevent mildew. 7. Pest control 7.1 Oil sunflower seedling pests are mainly tigers and weevils. Spring sowing of oil sunflower H. armigera is less harmful and generally does not require control. Summer sowing sunflower shall be controlled if it is seriously endangered. The way to control the tigers is to poison soils. Per acre can be used 50% phoxim EC 500ml water 1-2 kg, mixed with 40-60 kg of fine sand, sprinkled in the evening next to the seedlings. Control weevil: use 48% chlorpyrifos EC, or 50% phoxim EC or 1000 times solution of PR. 7.2 The focus of the disease is Sclerotinia and Alternaria. Sclerotinia, also known as rotten disk disease, can develop from seedling to anthesis. Black spot develops dark spots on leaves, petioles, and stems. Control methods: 1, a reasonable rotation. It is best to work with grass crops for more than three years. 2. Diseased plants should be removed in time to remove diseased leaves or diseased strains, and transported to the field for centralized destruction. 3, the use of fungicides, such as 800 times thiophanate-methyl WP or 800 times the carbendazim spray control. Fingerprint Lock Safe Box,Fingerprint Lock Safe,Fingerprint Lock Box,Fingerprint Safe Hebei Tiger Brand Group Jia Bao Cabinet Industry Co. LTD , https://www.cntigersafe.com